pax_global_header00006660000000000000000000000064121255731670014523gustar00rootroot0000000000000052 comment=748ef0df0ae891c65043a2a3c8d0f29cad358f5a libfuse-0.0.20140820/000077500000000000000000000000001212557316700137125ustar00rootroot00000000000000libfuse-0.0.20140820/.gitignore000066400000000000000000000004221212557316700157000ustar00rootroot00000000000000*.lo *.o .deps Makefile Makefile.in aclocal.m4 libtool stamp-h stamp-h.in autom4te.cache autoscan.log config.h config.h.in config.h.in~ config.log config.status configure .libs libfuse.la INSTALL config.guess config.sub depcomp fuse.pc install-sh ltmain.sh missing stamp-h1 libfuse-0.0.20140820/AUTHORS000066400000000000000000000000441212557316700147600ustar00rootroot00000000000000Stefan Siegl libfuse-0.0.20140820/COPYING000066400000000000000000000431101212557316700147440ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. libfuse-0.0.20140820/ChangeLog000066400000000000000000000003411212557316700154620ustar00rootroot00000000000000#! /bin/sh # ChangeLog is more or less available through CVS revision history # there is no separate file telling what was changed line by line ... exec lynx "http://cvs.savannah.nongnu.org/viewcvs/libfuse/?root=hurdextras" libfuse-0.0.20140820/Makefile.am000066400000000000000000000004021212557316700157420ustar00rootroot00000000000000# Makefile.am # Used by automake and configure to create Makefile. # # Copyright (C) 2005,2006 Stefan Siegl , Germany SUBDIRS = include src pkgconfigdir = $(libdir)/pkgconfig pkgconfig_DATA = fuse.pc $(pkgconfig_DATA): config.status libfuse-0.0.20140820/NEWS000066400000000000000000000000261212557316700144070ustar00rootroot00000000000000no news is good news. libfuse-0.0.20140820/README000066400000000000000000000040421212557316700145720ustar00rootroot00000000000000 -*- mode: outline -*- * General Information libfuse is a library intended for the GNU Hurd trying to imitate the API of the fuse library, available from http://fuse.sourceforge.net, for Linux. It's based on Hurd's libnetfs and tries to bring all the fuse based virtual filesystems over to the Hurd. ** Fuse Low-Level API The low-level API will not be supported by libfuse/Hurd for the time being. This is simply because it is to specific to the Linux kernel and (besides that) it is not farly used now. In case the latter should change in the future, we might want to re-think about that issue though. This is, you will not succeed in compiling the hello_ll.c example from the example-24 directory. * Dependencies Actually none, besides libnetfs. However you should have installed that anyways (maybe missing just the header files). * Installation ./configure make make install For more details see the INSTALL file in this directory. * How To Use Translators linked against libfuse/Hurd don't work exactly like on the Linux operating system. To be more precise: you need to install them using settrans. Some filesystems check for the availibility of a command line argument, which they want to pass to libfuse, and simply fail, if you don't supply it. This is because on Linux you call the translator as a program as such and specify the mount-point as the first argument. If the fuse-based translator insists on that argument, just provide any useless information (maybe the correct path). This one will not be treated (at least by libfuse). The filesystem will be put on the node you provide to the settrans command. Anything else is not of any interest. Filesystems that try to export more than one filesystem (I don't know of any example, sorry, but these are generally supported by Linux's FUSE) will fail on the Hurd. This is because of the settrans thing. * Bug Reports You can contact us at . $Id: README,v 1.4 2006/01/30 22:33:57 stesie Exp $ libfuse-0.0.20140820/TODO000066400000000000000000000041771212557316700144130ustar00rootroot00000000000000-*- mode: outline -*- * example fusexmp crash Running the example fusexmp file system, the translator crashes (and the whole system might also crash) if you try to run a binary from within that file system, e.g. $ settrans -ac f ./fusexmp $ cd f $ bin/ls ** single-threaded operation The libfuse/Linux does allow to force single-threaded operation (`-s' command line arg). This was somewhat the hardcoded default case for the Hurd variant so far (mainly for debugging reasons). Single-threaded operation is necessary for parts of the Perl and Python bindings, where the filesystem callbacks would confuse the main interpreter. libfuse/Hurd does use multi-threaded operation by default as well now. This is, the fusexmp translator should work like a charm now (at least when it comes to this issue). * example null The example null file system does not return zeroes (which it is supposed to do, I think): $ settrans -ac n ./null $ od -x -N 10 < n 0000000 01f4 0000 0000 3000 0002 0000012 Is the following fix correct? --- netfs.c 15 Nov 2005 23:43:05 -0000 1.30 +++ netfs.c 2 Dec 2005 00:03:45 -0000 @@ -1090,6 +1101,8 @@ || (err = fshelp_access(&node->nn_stat, S_IREAD, cred))) goto out; + memset(data, 0, *len); + int sz = fuse_ops ? (fuse_ops->read(node->nn->path, data, *len, offset, &node->nn->info)) : (fuse_ops_compat->read(node->nn->path, data, *len, offset)); ** libfuse/Linux doesn't return null-bytes as well Since it isn't of any practical use for a meaningful filesystem, I would vote against applying it. * We're supposed to define netfs_make_user(). ** are we? I cannot find any appearance in the Hurd sources except for the netfs.h header file. Is this just one relict there or is it of any use? The task sounds rather like another libraries and not a filesystem's job. * readdir() FUSE's readdir() needs to be supported in netfs_get_dirents(). ** this was introduced by an api change with version 2.3 ... and should finally be supported. But still needs some more testing. I've just run the fusexmp_fh example so far. libfuse-0.0.20140820/configure.ac000066400000000000000000000023221212557316700161770ustar00rootroot00000000000000# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. # # Copyright (C) 2005,2006 by Stefan Siegl , Germany AC_PREREQ(2.59) AC_INIT(libfuse, 0.1, hurdextras-hackers@nongnu.org) AC_REVISION($Revision: 1.9 $) AC_CONFIG_SRCDIR(src/main.c) AM_CONFIG_HEADER(config.h) # Initialize automake AM_INIT_AUTOMAKE(libfuse, 0.1) # Checks for programs. m4_ifdef([LT_INIT], [LT_INIT], [AC_PROG_LIBTOOL]) AC_PROG_CC AC_PROG_MAKE_SET # compatibility for automake < 1.8 if test -z "$mkdir_p"; then mkdir_p="../mkinstalldirs" AC_SUBST(mkdir_p) fi # Checks for libraries. AC_CHECK_LIB([pthread], [pthread_rwlock_init]) AC_CHECK_LIB([ports], [hurd_ihash_init]) AC_CHECK_LIB([fshelp], [fshelp_touch]) AC_CHECK_LIB([iohelp], [iohelp_initialize_conch]) #AC_CHECK_LIB([netfs], [netfs_startup]) LIBS="-lnetfs $LIBS" CFLAGS="$CFLAGS -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -W -ggdb" # Checks for header files. # Checks for typedefs, structures, and compiler characteristics. # Checks for library functions. AC_CONFIG_FILES([fuse.pc Makefile] [include/Makefile src/Makefile] [example-25/Makefile example-26/Makefile]) AC_OUTPUT libfuse-0.0.20140820/example-25/000077500000000000000000000000001212557316700155715ustar00rootroot00000000000000libfuse-0.0.20140820/example-25/.gitignore000066400000000000000000000000361212557316700175600ustar00rootroot00000000000000fusexmp fusexmp_fh hello null libfuse-0.0.20140820/example-25/Makefile.am000066400000000000000000000005501212557316700176250ustar00rootroot00000000000000## Process this file with automake to produce Makefile.in noinst_PROGRAMS = fusexmp fusexmp_fh null hello # low-level api not supported: hello_ll fusexmp_SOURCES = fusexmp.c fusexmp_fh_SOURCES = fusexmp_fh.c null_SOURCES = null.c hello_SOURCES = hello.c LDADD = ../src/libfuse.la AM_CPPFLAGS = -DFUSE_USE_VERSION=25 -I$(top_srcdir) -I$(top_srcdir)/include libfuse-0.0.20140820/example-25/fusexmp.c000066400000000000000000000154371212557316700174360ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #ifdef linux /* For pread()/pwrite() */ #define _XOPEN_SOURCE 500 #endif #include #include #include #include #include #include #include #ifdef HAVE_SETXATTR #include #endif static int xmp_getattr(const char *path, struct stat *stbuf) { int res; res = lstat(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_access(const char *path, int mask) { int res; res = access(path, mask); if (res == -1) return -errno; return 0; } static int xmp_readlink(const char *path, char *buf, size_t size) { int res; res = readlink(path, buf, size - 1); if (res == -1) return -errno; buf[res] = '\0'; return 0; } static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { DIR *dp; struct dirent *de; (void) offset; (void) fi; dp = opendir(path); if (dp == NULL) return -errno; while ((de = readdir(dp)) != NULL) { struct stat st; memset(&st, 0, sizeof(st)); st.st_ino = de->d_ino; st.st_mode = de->d_type << 12; if (filler(buf, de->d_name, &st, 0)) break; } closedir(dp); return 0; } static int xmp_mknod(const char *path, mode_t mode, dev_t rdev) { int res; /* On Linux this could just be 'mknod(path, mode, rdev)' but this is more portable */ if (S_ISREG(mode)) { res = open(path, O_CREAT | O_EXCL | O_WRONLY, mode); if (res >= 0) res = close(res); } else if (S_ISFIFO(mode)) res = mkfifo(path, mode); else res = mknod(path, mode, rdev); if (res == -1) return -errno; return 0; } static int xmp_mkdir(const char *path, mode_t mode) { int res; res = mkdir(path, mode); if (res == -1) return -errno; return 0; } static int xmp_unlink(const char *path) { int res; res = unlink(path); if (res == -1) return -errno; return 0; } static int xmp_rmdir(const char *path) { int res; res = rmdir(path); if (res == -1) return -errno; return 0; } static int xmp_symlink(const char *from, const char *to) { int res; res = symlink(from, to); if (res == -1) return -errno; return 0; } static int xmp_rename(const char *from, const char *to) { int res; res = rename(from, to); if (res == -1) return -errno; return 0; } static int xmp_link(const char *from, const char *to) { int res; res = link(from, to); if (res == -1) return -errno; return 0; } static int xmp_chmod(const char *path, mode_t mode) { int res; res = chmod(path, mode); if (res == -1) return -errno; return 0; } static int xmp_chown(const char *path, uid_t uid, gid_t gid) { int res; res = lchown(path, uid, gid); if (res == -1) return -errno; return 0; } static int xmp_truncate(const char *path, off_t size) { int res; res = truncate(path, size); if (res == -1) return -errno; return 0; } static int xmp_utime(const char *path, struct utimbuf *buf) { int res; res = utime(path, buf); if (res == -1) return -errno; return 0; } static int xmp_open(const char *path, struct fuse_file_info *fi) { int res; res = open(path, fi->flags); if (res == -1) return -errno; close(res); return 0; } static int xmp_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int fd; int res; (void) fi; fd = open(path, O_RDONLY); if (fd == -1) return -errno; res = pread(fd, buf, size, offset); if (res == -1) res = -errno; close(fd); return res; } static int xmp_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int fd; int res; (void) fi; fd = open(path, O_WRONLY); if (fd == -1) return -errno; res = pwrite(fd, buf, size, offset); if (res == -1) res = -errno; close(fd); return res; } static int xmp_statfs(const char *path, struct statvfs *stbuf) { int res; res = statvfs(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_release(const char *path, struct fuse_file_info *fi) { /* Just a stub. This method is optional and can safely be left unimplemented */ (void) path; (void) fi; return 0; } static int xmp_fsync(const char *path, int isdatasync, struct fuse_file_info *fi) { /* Just a stub. This method is optional and can safely be left unimplemented */ (void) path; (void) isdatasync; (void) fi; return 0; } #ifdef HAVE_SETXATTR /* xattr operations are optional and can safely be left unimplemented */ static int xmp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) { int res = lsetxattr(path, name, value, size, flags); if (res == -1) return -errno; return 0; } static int xmp_getxattr(const char *path, const char *name, char *value, size_t size) { int res = lgetxattr(path, name, value, size); if (res == -1) return -errno; return res; } static int xmp_listxattr(const char *path, char *list, size_t size) { int res = llistxattr(path, list, size); if (res == -1) return -errno; return res; } static int xmp_removexattr(const char *path, const char *name) { int res = lremovexattr(path, name); if (res == -1) return -errno; return 0; } #endif /* HAVE_SETXATTR */ static struct fuse_operations xmp_oper = { .getattr = xmp_getattr, .access = xmp_access, .readlink = xmp_readlink, .readdir = xmp_readdir, .mknod = xmp_mknod, .mkdir = xmp_mkdir, .symlink = xmp_symlink, .unlink = xmp_unlink, .rmdir = xmp_rmdir, .rename = xmp_rename, .link = xmp_link, .chmod = xmp_chmod, .chown = xmp_chown, .truncate = xmp_truncate, .utime = xmp_utime, .open = xmp_open, .read = xmp_read, .write = xmp_write, .statfs = xmp_statfs, .release = xmp_release, .fsync = xmp_fsync, #ifdef HAVE_SETXATTR .setxattr = xmp_setxattr, .getxattr = xmp_getxattr, .listxattr = xmp_listxattr, .removexattr= xmp_removexattr, #endif }; int main(int argc, char *argv[]) { umask(0); return fuse_main(argc, argv, &xmp_oper); } libfuse-0.0.20140820/example-25/fusexmp_fh.c000066400000000000000000000167651212557316700201200ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #define _GNU_SOURCE #include #include #include #include #include #include #include #ifdef HAVE_SETXATTR #include #endif static int xmp_getattr(const char *path, struct stat *stbuf) { int res; res = lstat(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_fgetattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) { int res; (void) path; res = fstat(fi->fh, stbuf); if (res == -1) return -errno; return 0; } static int xmp_access(const char *path, int mask) { int res; res = access(path, mask); if (res == -1) return -errno; return 0; } static int xmp_readlink(const char *path, char *buf, size_t size) { int res; res = readlink(path, buf, size - 1); if (res == -1) return -errno; buf[res] = '\0'; return 0; } static int xmp_opendir(const char *path, struct fuse_file_info *fi) { DIR *dp = opendir(path); if (dp == NULL) return -errno; fi->fh = (unsigned long) dp; return 0; } static inline DIR *get_dirp(struct fuse_file_info *fi) { return (DIR *) (uintptr_t) fi->fh; } static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { DIR *dp = get_dirp(fi); struct dirent *de; (void) path; seekdir(dp, offset); while ((de = readdir(dp)) != NULL) { struct stat st; memset(&st, 0, sizeof(st)); st.st_ino = de->d_ino; st.st_mode = de->d_type << 12; if (filler(buf, de->d_name, &st, telldir(dp))) break; } return 0; } static int xmp_releasedir(const char *path, struct fuse_file_info *fi) { DIR *dp = get_dirp(fi); (void) path; closedir(dp); return 0; } static int xmp_mknod(const char *path, mode_t mode, dev_t rdev) { int res; if (S_ISFIFO(mode)) res = mkfifo(path, mode); else res = mknod(path, mode, rdev); if (res == -1) return -errno; return 0; } static int xmp_mkdir(const char *path, mode_t mode) { int res; res = mkdir(path, mode); if (res == -1) return -errno; return 0; } static int xmp_unlink(const char *path) { int res; res = unlink(path); if (res == -1) return -errno; return 0; } static int xmp_rmdir(const char *path) { int res; res = rmdir(path); if (res == -1) return -errno; return 0; } static int xmp_symlink(const char *from, const char *to) { int res; res = symlink(from, to); if (res == -1) return -errno; return 0; } static int xmp_rename(const char *from, const char *to) { int res; res = rename(from, to); if (res == -1) return -errno; return 0; } static int xmp_link(const char *from, const char *to) { int res; res = link(from, to); if (res == -1) return -errno; return 0; } static int xmp_chmod(const char *path, mode_t mode) { int res; res = chmod(path, mode); if (res == -1) return -errno; return 0; } static int xmp_chown(const char *path, uid_t uid, gid_t gid) { int res; res = lchown(path, uid, gid); if (res == -1) return -errno; return 0; } static int xmp_truncate(const char *path, off_t size) { int res; res = truncate(path, size); if (res == -1) return -errno; return 0; } static int xmp_ftruncate(const char *path, off_t size, struct fuse_file_info *fi) { int res; (void) path; res = ftruncate(fi->fh, size); if (res == -1) return -errno; return 0; } static int xmp_utime(const char *path, struct utimbuf *buf) { int res; res = utime(path, buf); if (res == -1) return -errno; return 0; } static int xmp_create(const char *path, mode_t mode, struct fuse_file_info *fi) { int fd; fd = open(path, fi->flags, mode); if (fd == -1) return -errno; fi->fh = fd; return 0; } static int xmp_open(const char *path, struct fuse_file_info *fi) { int fd; fd = open(path, fi->flags); if (fd == -1) return -errno; fi->fh = fd; return 0; } static int xmp_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int res; (void) path; res = pread(fi->fh, buf, size, offset); if (res == -1) res = -errno; return res; } static int xmp_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int res; (void) path; res = pwrite(fi->fh, buf, size, offset); if (res == -1) res = -errno; return res; } static int xmp_statfs(const char *path, struct statvfs *stbuf) { int res; res = statvfs(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_release(const char *path, struct fuse_file_info *fi) { (void) path; close(fi->fh); return 0; } static int xmp_fsync(const char *path, int isdatasync, struct fuse_file_info *fi) { int res; (void) path; #ifndef HAVE_FDATASYNC (void) isdatasync; #else if (isdatasync) res = fdatasync(fi->fh); else #endif res = fsync(fi->fh); if (res == -1) return -errno; return 0; } #ifdef HAVE_SETXATTR /* xattr operations are optional and can safely be left unimplemented */ static int xmp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) { int res = lsetxattr(path, name, value, size, flags); if (res == -1) return -errno; return 0; } static int xmp_getxattr(const char *path, const char *name, char *value, size_t size) { int res = lgetxattr(path, name, value, size); if (res == -1) return -errno; return res; } static int xmp_listxattr(const char *path, char *list, size_t size) { int res = llistxattr(path, list, size); if (res == -1) return -errno; return res; } static int xmp_removexattr(const char *path, const char *name) { int res = lremovexattr(path, name); if (res == -1) return -errno; return 0; } #endif /* HAVE_SETXATTR */ static struct fuse_operations xmp_oper = { .getattr = xmp_getattr, .fgetattr = xmp_fgetattr, .access = xmp_access, .readlink = xmp_readlink, .opendir = xmp_opendir, .readdir = xmp_readdir, .releasedir = xmp_releasedir, .mknod = xmp_mknod, .mkdir = xmp_mkdir, .symlink = xmp_symlink, .unlink = xmp_unlink, .rmdir = xmp_rmdir, .rename = xmp_rename, .link = xmp_link, .chmod = xmp_chmod, .chown = xmp_chown, .truncate = xmp_truncate, .ftruncate = xmp_ftruncate, .utime = xmp_utime, .create = xmp_create, .open = xmp_open, .read = xmp_read, .write = xmp_write, .statfs = xmp_statfs, .release = xmp_release, .fsync = xmp_fsync, #ifdef HAVE_SETXATTR .setxattr = xmp_setxattr, .getxattr = xmp_getxattr, .listxattr = xmp_listxattr, .removexattr= xmp_removexattr, #endif }; int main(int argc, char *argv[]) { umask(0); return fuse_main(argc, argv, &xmp_oper); } libfuse-0.0.20140820/example-25/hello.c000066400000000000000000000040521212557316700170410ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #include #include #include #include static const char *hello_str = "Hello World!\n"; static const char *hello_path = "/hello"; static int hello_getattr(const char *path, struct stat *stbuf) { int res = 0; memset(stbuf, 0, sizeof(struct stat)); if(strcmp(path, "/") == 0) { stbuf->st_mode = S_IFDIR | 0755; stbuf->st_nlink = 2; } else if(strcmp(path, hello_path) == 0) { stbuf->st_mode = S_IFREG | 0444; stbuf->st_nlink = 1; stbuf->st_size = strlen(hello_str); } else res = -ENOENT; return res; } static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; filler(buf, ".", NULL, 0); filler(buf, "..", NULL, 0); filler(buf, hello_path + 1, NULL, 0); return 0; } static int hello_open(const char *path, struct fuse_file_info *fi) { if(strcmp(path, hello_path) != 0) return -ENOENT; if((fi->flags & 3) != O_RDONLY) return -EACCES; return 0; } static int hello_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { size_t len; (void) fi; if(strcmp(path, hello_path) != 0) return -ENOENT; len = strlen(hello_str); if (offset < len) { if (offset + size > len) size = len - offset; memcpy(buf, hello_str + offset, size); } else size = 0; return size; } static struct fuse_operations hello_oper = { .getattr = hello_getattr, .readdir = hello_readdir, .open = hello_open, .read = hello_read, }; int main(int argc, char *argv[]) { return fuse_main(argc, argv, &hello_oper); } libfuse-0.0.20140820/example-25/hello_ll.c000066400000000000000000000106121212557316700175270ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #include #include #include #include #include #include #include static const char *hello_str = "Hello World!\n"; static const char *hello_name = "hello"; static int hello_stat(fuse_ino_t ino, struct stat *stbuf) { stbuf->st_ino = ino; switch (ino) { case 1: stbuf->st_mode = S_IFDIR | 0755; stbuf->st_nlink = 2; break; case 2: stbuf->st_mode = S_IFREG | 0444; stbuf->st_nlink = 1; stbuf->st_size = strlen(hello_str); break; default: return -1; } return 0; } static void hello_ll_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { struct stat stbuf; (void) fi; memset(&stbuf, 0, sizeof(stbuf)); if (hello_stat(ino, &stbuf) == -1) fuse_reply_err(req, ENOENT); else fuse_reply_attr(req, &stbuf, 1.0); } static void hello_ll_lookup(fuse_req_t req, fuse_ino_t parent, const char *name) { struct fuse_entry_param e; if (parent != 1 || strcmp(name, hello_name) != 0) fuse_reply_err(req, ENOENT); else { memset(&e, 0, sizeof(e)); e.ino = 2; e.attr_timeout = 1.0; e.entry_timeout = 1.0; hello_stat(e.ino, &e.attr); fuse_reply_entry(req, &e); } } struct dirbuf { char *p; size_t size; }; static void dirbuf_add(struct dirbuf *b, const char *name, fuse_ino_t ino) { struct stat stbuf; size_t oldsize = b->size; b->size += fuse_dirent_size(strlen(name)); b->p = (char *) realloc(b->p, b->size); memset(&stbuf, 0, sizeof(stbuf)); stbuf.st_ino = ino; fuse_add_dirent(b->p + oldsize, name, &stbuf, b->size); } #define min(x, y) ((x) < (y) ? (x) : (y)) static int reply_buf_limited(fuse_req_t req, const char *buf, size_t bufsize, off_t off, size_t maxsize) { if (off < bufsize) return fuse_reply_buf(req, buf + off, min(bufsize - off, maxsize)); else return fuse_reply_buf(req, NULL, 0); } static void hello_ll_readdir(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, struct fuse_file_info *fi) { (void) fi; if (ino != 1) fuse_reply_err(req, ENOTDIR); else { struct dirbuf b; memset(&b, 0, sizeof(b)); dirbuf_add(&b, ".", 1); dirbuf_add(&b, "..", 1); dirbuf_add(&b, hello_name, 2); reply_buf_limited(req, b.p, b.size, off, size); free(b.p); } } static void hello_ll_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { if (ino != 2) fuse_reply_err(req, EISDIR); else if ((fi->flags & 3) != O_RDONLY) fuse_reply_err(req, EACCES); else fuse_reply_open(req, fi); } static void hello_ll_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, struct fuse_file_info *fi) { (void) fi; assert(ino == 2); reply_buf_limited(req, hello_str, strlen(hello_str), off, size); } static struct fuse_lowlevel_ops hello_ll_oper = { .lookup = hello_ll_lookup, .getattr = hello_ll_getattr, .readdir = hello_ll_readdir, .open = hello_ll_open, .read = hello_ll_read, }; int main(int argc, char *argv[]) { struct fuse_args args = FUSE_ARGS_INIT(argc, argv); char *mountpoint; int err = -1; int fd; if (fuse_parse_cmdline(&args, &mountpoint, NULL, NULL) != -1 && (fd = fuse_mount(mountpoint, &args)) != -1) { struct fuse_session *se; se = fuse_lowlevel_new(&args, &hello_ll_oper, sizeof(hello_ll_oper), NULL); if (se != NULL) { if (fuse_set_signal_handlers(se) != -1) { struct fuse_chan *ch = fuse_kern_chan_new(fd); if (ch != NULL) { fuse_session_add_chan(se, ch); err = fuse_session_loop(se); } fuse_remove_signal_handlers(se); } fuse_session_destroy(se); } close(fd); } fuse_unmount(mountpoint); fuse_opt_free_args(&args); return err ? 1 : 0; } libfuse-0.0.20140820/example-25/null.c000066400000000000000000000033621212557316700167130ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. */ #include #include #include #include #include static int null_getattr(const char *path, struct stat *stbuf) { if(strcmp(path, "/") != 0) return -ENOENT; stbuf->st_mode = S_IFREG | 0644; stbuf->st_nlink = 1; stbuf->st_uid = getuid(); stbuf->st_gid = getgid(); stbuf->st_size = (1ULL << 32); /* 4G */ stbuf->st_blocks = 0; stbuf->st_atime = stbuf->st_mtime = stbuf->st_ctime = time(NULL); return 0; } static int null_truncate(const char *path, off_t size) { (void) size; if(strcmp(path, "/") != 0) return -ENOENT; return 0; } static int null_open(const char *path, struct fuse_file_info *fi) { (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return 0; } static int null_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { (void) buf; (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return size; } static int null_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { (void) buf; (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return size; } static struct fuse_operations null_oper = { .getattr = null_getattr, .truncate = null_truncate, .open = null_open, .read = null_read, .write = null_write, }; int main(int argc, char *argv[]) { return fuse_main(argc, argv, &null_oper); } libfuse-0.0.20140820/example-26/000077500000000000000000000000001212557316700155725ustar00rootroot00000000000000libfuse-0.0.20140820/example-26/.gitignore000066400000000000000000000000361212557316700175610ustar00rootroot00000000000000fusexmp fusexmp_fh hello null libfuse-0.0.20140820/example-26/Makefile.am000066400000000000000000000005501212557316700176260ustar00rootroot00000000000000## Process this file with automake to produce Makefile.in noinst_PROGRAMS = fusexmp fusexmp_fh null hello # low-level api not supported: hello_ll fusexmp_SOURCES = fusexmp.c fusexmp_fh_SOURCES = fusexmp_fh.c null_SOURCES = null.c hello_SOURCES = hello.c LDADD = ../src/libfuse.la AM_CPPFLAGS = -DFUSE_USE_VERSION=26 -I$(top_srcdir) -I$(top_srcdir)/include libfuse-0.0.20140820/example-26/fusexmp.c000066400000000000000000000161341212557316700174320ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. gcc -Wall `pkg-config fuse --cflags --libs` fusexmp.c -o fusexmp */ #define FUSE_USE_VERSION 26 #include #ifdef linux /* For pread()/pwrite() */ #define _XOPEN_SOURCE 500 #endif #include #include #include #include #include #include #include #include #ifdef HAVE_SETXATTR #include #endif static int xmp_getattr(const char *path, struct stat *stbuf) { int res; res = lstat(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_access(const char *path, int mask) { int res; res = access(path, mask); if (res == -1) return -errno; return 0; } static int xmp_readlink(const char *path, char *buf, size_t size) { int res; res = readlink(path, buf, size - 1); if (res == -1) return -errno; buf[res] = '\0'; return 0; } static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { DIR *dp; struct dirent *de; (void) offset; (void) fi; dp = opendir(path); if (dp == NULL) return -errno; while ((de = readdir(dp)) != NULL) { struct stat st; memset(&st, 0, sizeof(st)); st.st_ino = de->d_ino; st.st_mode = de->d_type << 12; if (filler(buf, de->d_name, &st, 0)) break; } closedir(dp); return 0; } static int xmp_mknod(const char *path, mode_t mode, dev_t rdev) { int res; /* On Linux this could just be 'mknod(path, mode, rdev)' but this is more portable */ if (S_ISREG(mode)) { res = open(path, O_CREAT | O_EXCL | O_WRONLY, mode); if (res >= 0) res = close(res); } else if (S_ISFIFO(mode)) res = mkfifo(path, mode); else res = mknod(path, mode, rdev); if (res == -1) return -errno; return 0; } static int xmp_mkdir(const char *path, mode_t mode) { int res; res = mkdir(path, mode); if (res == -1) return -errno; return 0; } static int xmp_unlink(const char *path) { int res; res = unlink(path); if (res == -1) return -errno; return 0; } static int xmp_rmdir(const char *path) { int res; res = rmdir(path); if (res == -1) return -errno; return 0; } static int xmp_symlink(const char *from, const char *to) { int res; res = symlink(from, to); if (res == -1) return -errno; return 0; } static int xmp_rename(const char *from, const char *to) { int res; res = rename(from, to); if (res == -1) return -errno; return 0; } static int xmp_link(const char *from, const char *to) { int res; res = link(from, to); if (res == -1) return -errno; return 0; } static int xmp_chmod(const char *path, mode_t mode) { int res; res = chmod(path, mode); if (res == -1) return -errno; return 0; } static int xmp_chown(const char *path, uid_t uid, gid_t gid) { int res; res = lchown(path, uid, gid); if (res == -1) return -errno; return 0; } static int xmp_truncate(const char *path, off_t size) { int res; res = truncate(path, size); if (res == -1) return -errno; return 0; } static int xmp_utimens(const char *path, const struct timespec ts[2]) { int res; struct timeval tv[2]; tv[0].tv_sec = ts[0].tv_sec; tv[0].tv_usec = ts[0].tv_nsec / 1000; tv[1].tv_sec = ts[1].tv_sec; tv[1].tv_usec = ts[1].tv_nsec / 1000; res = utimes(path, tv); if (res == -1) return -errno; return 0; } static int xmp_open(const char *path, struct fuse_file_info *fi) { int res; res = open(path, fi->flags); if (res == -1) return -errno; close(res); return 0; } static int xmp_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int fd; int res; (void) fi; fd = open(path, O_RDONLY); if (fd == -1) return -errno; res = pread(fd, buf, size, offset); if (res == -1) res = -errno; close(fd); return res; } static int xmp_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int fd; int res; (void) fi; fd = open(path, O_WRONLY); if (fd == -1) return -errno; res = pwrite(fd, buf, size, offset); if (res == -1) res = -errno; close(fd); return res; } static int xmp_statfs(const char *path, struct statvfs *stbuf) { int res; res = statvfs(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_release(const char *path, struct fuse_file_info *fi) { /* Just a stub. This method is optional and can safely be left unimplemented */ (void) path; (void) fi; return 0; } static int xmp_fsync(const char *path, int isdatasync, struct fuse_file_info *fi) { /* Just a stub. This method is optional and can safely be left unimplemented */ (void) path; (void) isdatasync; (void) fi; return 0; } #ifdef HAVE_SETXATTR /* xattr operations are optional and can safely be left unimplemented */ static int xmp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) { int res = lsetxattr(path, name, value, size, flags); if (res == -1) return -errno; return 0; } static int xmp_getxattr(const char *path, const char *name, char *value, size_t size) { int res = lgetxattr(path, name, value, size); if (res == -1) return -errno; return res; } static int xmp_listxattr(const char *path, char *list, size_t size) { int res = llistxattr(path, list, size); if (res == -1) return -errno; return res; } static int xmp_removexattr(const char *path, const char *name) { int res = lremovexattr(path, name); if (res == -1) return -errno; return 0; } #endif /* HAVE_SETXATTR */ static struct fuse_operations xmp_oper = { .getattr = xmp_getattr, .access = xmp_access, .readlink = xmp_readlink, .readdir = xmp_readdir, .mknod = xmp_mknod, .mkdir = xmp_mkdir, .symlink = xmp_symlink, .unlink = xmp_unlink, .rmdir = xmp_rmdir, .rename = xmp_rename, .link = xmp_link, .chmod = xmp_chmod, .chown = xmp_chown, .truncate = xmp_truncate, .utimens = xmp_utimens, .open = xmp_open, .read = xmp_read, .write = xmp_write, .statfs = xmp_statfs, .release = xmp_release, .fsync = xmp_fsync, #ifdef HAVE_SETXATTR .setxattr = xmp_setxattr, .getxattr = xmp_getxattr, .listxattr = xmp_listxattr, .removexattr= xmp_removexattr, #endif }; int main(int argc, char *argv[]) { umask(0); return fuse_main(argc, argv, &xmp_oper, NULL); } libfuse-0.0.20140820/example-26/fusexmp_fh.c000066400000000000000000000212121212557316700201000ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. gcc -Wall `pkg-config fuse --cflags --libs` -lulockmgr fusexmp_fh.c -o fusexmp_fh */ #define FUSE_USE_VERSION 26 #include #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #ifdef HAVE_SETXATTR #include #endif static int xmp_getattr(const char *path, struct stat *stbuf) { int res; res = lstat(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_fgetattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) { int res; (void) path; res = fstat(fi->fh, stbuf); if (res == -1) return -errno; return 0; } static int xmp_access(const char *path, int mask) { int res; res = access(path, mask); if (res == -1) return -errno; return 0; } static int xmp_readlink(const char *path, char *buf, size_t size) { int res; res = readlink(path, buf, size - 1); if (res == -1) return -errno; buf[res] = '\0'; return 0; } static int xmp_opendir(const char *path, struct fuse_file_info *fi) { DIR *dp = opendir(path); if (dp == NULL) return -errno; fi->fh = (unsigned long) dp; return 0; } static inline DIR *get_dirp(struct fuse_file_info *fi) { return (DIR *) (uintptr_t) fi->fh; } static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { DIR *dp = get_dirp(fi); struct dirent *de; (void) path; seekdir(dp, offset); while ((de = readdir(dp)) != NULL) { struct stat st; memset(&st, 0, sizeof(st)); st.st_ino = de->d_ino; st.st_mode = de->d_type << 12; if (filler(buf, de->d_name, &st, telldir(dp))) break; } return 0; } static int xmp_releasedir(const char *path, struct fuse_file_info *fi) { DIR *dp = get_dirp(fi); (void) path; closedir(dp); return 0; } static int xmp_mknod(const char *path, mode_t mode, dev_t rdev) { int res; if (S_ISFIFO(mode)) res = mkfifo(path, mode); else res = mknod(path, mode, rdev); if (res == -1) return -errno; return 0; } static int xmp_mkdir(const char *path, mode_t mode) { int res; res = mkdir(path, mode); if (res == -1) return -errno; return 0; } static int xmp_unlink(const char *path) { int res; res = unlink(path); if (res == -1) return -errno; return 0; } static int xmp_rmdir(const char *path) { int res; res = rmdir(path); if (res == -1) return -errno; return 0; } static int xmp_symlink(const char *from, const char *to) { int res; res = symlink(from, to); if (res == -1) return -errno; return 0; } static int xmp_rename(const char *from, const char *to) { int res; res = rename(from, to); if (res == -1) return -errno; return 0; } static int xmp_link(const char *from, const char *to) { int res; res = link(from, to); if (res == -1) return -errno; return 0; } static int xmp_chmod(const char *path, mode_t mode) { int res; res = chmod(path, mode); if (res == -1) return -errno; return 0; } static int xmp_chown(const char *path, uid_t uid, gid_t gid) { int res; res = lchown(path, uid, gid); if (res == -1) return -errno; return 0; } static int xmp_truncate(const char *path, off_t size) { int res; res = truncate(path, size); if (res == -1) return -errno; return 0; } static int xmp_ftruncate(const char *path, off_t size, struct fuse_file_info *fi) { int res; (void) path; res = ftruncate(fi->fh, size); if (res == -1) return -errno; return 0; } static int xmp_utimens(const char *path, const struct timespec ts[2]) { int res; struct timeval tv[2]; tv[0].tv_sec = ts[0].tv_sec; tv[0].tv_usec = ts[0].tv_nsec / 1000; tv[1].tv_sec = ts[1].tv_sec; tv[1].tv_usec = ts[1].tv_nsec / 1000; res = utimes(path, tv); if (res == -1) return -errno; return 0; } static int xmp_create(const char *path, mode_t mode, struct fuse_file_info *fi) { int fd; fd = open(path, fi->flags, mode); if (fd == -1) return -errno; fi->fh = fd; return 0; } static int xmp_open(const char *path, struct fuse_file_info *fi) { int fd; fd = open(path, fi->flags); if (fd == -1) return -errno; fi->fh = fd; return 0; } static int xmp_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int res; (void) path; res = pread(fi->fh, buf, size, offset); if (res == -1) res = -errno; return res; } static int xmp_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { int res; (void) path; res = pwrite(fi->fh, buf, size, offset); if (res == -1) res = -errno; return res; } static int xmp_statfs(const char *path, struct statvfs *stbuf) { int res; res = statvfs(path, stbuf); if (res == -1) return -errno; return 0; } static int xmp_flush(const char *path, struct fuse_file_info *fi) { int res; (void) path; /* This is called from every close on an open file, so call the close on the underlying filesystem. But since flush may be called multiple times for an open file, this must not really close the file. This is important if used on a network filesystem like NFS which flush the data/metadata on close() */ res = close(dup(fi->fh)); if (res == -1) return -errno; return 0; } static int xmp_release(const char *path, struct fuse_file_info *fi) { (void) path; close(fi->fh); return 0; } static int xmp_fsync(const char *path, int isdatasync, struct fuse_file_info *fi) { int res; (void) path; #ifndef HAVE_FDATASYNC (void) isdatasync; #else if (isdatasync) res = fdatasync(fi->fh); else #endif res = fsync(fi->fh); if (res == -1) return -errno; return 0; } #ifdef HAVE_SETXATTR /* xattr operations are optional and can safely be left unimplemented */ static int xmp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) { int res = lsetxattr(path, name, value, size, flags); if (res == -1) return -errno; return 0; } static int xmp_getxattr(const char *path, const char *name, char *value, size_t size) { int res = lgetxattr(path, name, value, size); if (res == -1) return -errno; return res; } static int xmp_listxattr(const char *path, char *list, size_t size) { int res = llistxattr(path, list, size); if (res == -1) return -errno; return res; } static int xmp_removexattr(const char *path, const char *name) { int res = lremovexattr(path, name); if (res == -1) return -errno; return 0; } #endif /* HAVE_SETXATTR */ static int xmp_lock(const char *path, struct fuse_file_info *fi, int cmd, struct flock *lock) { (void) path; return ulockmgr_op(fi->fh, cmd, lock, &fi->lock_owner, sizeof(fi->lock_owner)); } static struct fuse_operations xmp_oper = { .getattr = xmp_getattr, .fgetattr = xmp_fgetattr, .access = xmp_access, .readlink = xmp_readlink, .opendir = xmp_opendir, .readdir = xmp_readdir, .releasedir = xmp_releasedir, .mknod = xmp_mknod, .mkdir = xmp_mkdir, .symlink = xmp_symlink, .unlink = xmp_unlink, .rmdir = xmp_rmdir, .rename = xmp_rename, .link = xmp_link, .chmod = xmp_chmod, .chown = xmp_chown, .truncate = xmp_truncate, .ftruncate = xmp_ftruncate, .utimens = xmp_utimens, .create = xmp_create, .open = xmp_open, .read = xmp_read, .write = xmp_write, .statfs = xmp_statfs, .flush = xmp_flush, .release = xmp_release, .fsync = xmp_fsync, #ifdef HAVE_SETXATTR .setxattr = xmp_setxattr, .getxattr = xmp_getxattr, .listxattr = xmp_listxattr, .removexattr= xmp_removexattr, #endif .lock = xmp_lock, }; int main(int argc, char *argv[]) { umask(0); return fuse_main(argc, argv, &xmp_oper, NULL); } libfuse-0.0.20140820/example-26/hello.c000066400000000000000000000042171212557316700170450ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. gcc -Wall `pkg-config fuse --cflags --libs` hello.c -o hello */ #define FUSE_USE_VERSION 26 #include #include #include #include #include static const char *hello_str = "Hello World!\n"; static const char *hello_path = "/hello"; static int hello_getattr(const char *path, struct stat *stbuf) { int res = 0; memset(stbuf, 0, sizeof(struct stat)); if(strcmp(path, "/") == 0) { stbuf->st_mode = S_IFDIR | 0755; stbuf->st_nlink = 2; } else if(strcmp(path, hello_path) == 0) { stbuf->st_mode = S_IFREG | 0444; stbuf->st_nlink = 1; stbuf->st_size = strlen(hello_str); } else res = -ENOENT; return res; } static int hello_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; filler(buf, ".", NULL, 0); filler(buf, "..", NULL, 0); filler(buf, hello_path + 1, NULL, 0); return 0; } static int hello_open(const char *path, struct fuse_file_info *fi) { if(strcmp(path, hello_path) != 0) return -ENOENT; if((fi->flags & 3) != O_RDONLY) return -EACCES; return 0; } static int hello_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { size_t len; (void) fi; if(strcmp(path, hello_path) != 0) return -ENOENT; len = strlen(hello_str); if (offset < len) { if (offset + size > len) size = len - offset; memcpy(buf, hello_str + offset, size); } else size = 0; return size; } static struct fuse_operations hello_oper = { .getattr = hello_getattr, .readdir = hello_readdir, .open = hello_open, .read = hello_read, }; int main(int argc, char *argv[]) { return fuse_main(argc, argv, &hello_oper, NULL); } libfuse-0.0.20140820/example-26/hello_ll.c000066400000000000000000000110351212557316700175300ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. gcc -Wall `pkg-config fuse --cflags --libs` hello_ll.c -o hello_ll */ #define FUSE_USE_VERSION 26 #include #include #include #include #include #include #include #include static const char *hello_str = "Hello World!\n"; static const char *hello_name = "hello"; static int hello_stat(fuse_ino_t ino, struct stat *stbuf) { stbuf->st_ino = ino; switch (ino) { case 1: stbuf->st_mode = S_IFDIR | 0755; stbuf->st_nlink = 2; break; case 2: stbuf->st_mode = S_IFREG | 0444; stbuf->st_nlink = 1; stbuf->st_size = strlen(hello_str); break; default: return -1; } return 0; } static void hello_ll_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { struct stat stbuf; (void) fi; memset(&stbuf, 0, sizeof(stbuf)); if (hello_stat(ino, &stbuf) == -1) fuse_reply_err(req, ENOENT); else fuse_reply_attr(req, &stbuf, 1.0); } static void hello_ll_lookup(fuse_req_t req, fuse_ino_t parent, const char *name) { struct fuse_entry_param e; if (parent != 1 || strcmp(name, hello_name) != 0) fuse_reply_err(req, ENOENT); else { memset(&e, 0, sizeof(e)); e.ino = 2; e.attr_timeout = 1.0; e.entry_timeout = 1.0; hello_stat(e.ino, &e.attr); fuse_reply_entry(req, &e); } } struct dirbuf { char *p; size_t size; }; static void dirbuf_add(fuse_req_t req, struct dirbuf *b, const char *name, fuse_ino_t ino) { struct stat stbuf; size_t oldsize = b->size; b->size += fuse_add_direntry(req, NULL, 0, name, NULL, 0); b->p = (char *) realloc(b->p, b->size); memset(&stbuf, 0, sizeof(stbuf)); stbuf.st_ino = ino; fuse_add_direntry(req, b->p + oldsize, b->size - oldsize, name, &stbuf, b->size); } #define min(x, y) ((x) < (y) ? (x) : (y)) static int reply_buf_limited(fuse_req_t req, const char *buf, size_t bufsize, off_t off, size_t maxsize) { if (off < bufsize) return fuse_reply_buf(req, buf + off, min(bufsize - off, maxsize)); else return fuse_reply_buf(req, NULL, 0); } static void hello_ll_readdir(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, struct fuse_file_info *fi) { (void) fi; if (ino != 1) fuse_reply_err(req, ENOTDIR); else { struct dirbuf b; memset(&b, 0, sizeof(b)); dirbuf_add(req, &b, ".", 1); dirbuf_add(req, &b, "..", 1); dirbuf_add(req, &b, hello_name, 2); reply_buf_limited(req, b.p, b.size, off, size); free(b.p); } } static void hello_ll_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { if (ino != 2) fuse_reply_err(req, EISDIR); else if ((fi->flags & 3) != O_RDONLY) fuse_reply_err(req, EACCES); else fuse_reply_open(req, fi); } static void hello_ll_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off, struct fuse_file_info *fi) { (void) fi; assert(ino == 2); reply_buf_limited(req, hello_str, strlen(hello_str), off, size); } static struct fuse_lowlevel_ops hello_ll_oper = { .lookup = hello_ll_lookup, .getattr = hello_ll_getattr, .readdir = hello_ll_readdir, .open = hello_ll_open, .read = hello_ll_read, }; int main(int argc, char *argv[]) { struct fuse_args args = FUSE_ARGS_INIT(argc, argv); struct fuse_chan *ch; char *mountpoint; int err = -1; if (fuse_parse_cmdline(&args, &mountpoint, NULL, NULL) != -1 && (ch = fuse_mount(mountpoint, &args)) != NULL) { struct fuse_session *se; se = fuse_lowlevel_new(&args, &hello_ll_oper, sizeof(hello_ll_oper), NULL); if (se != NULL) { if (fuse_set_signal_handlers(se) != -1) { fuse_session_add_chan(se, ch); err = fuse_session_loop(se); fuse_remove_signal_handlers(se); fuse_session_remove_chan(ch); } fuse_session_destroy(se); } fuse_unmount(mountpoint, ch); } fuse_opt_free_args(&args); return err ? 1 : 0; } libfuse-0.0.20140820/example-26/null.c000066400000000000000000000035251212557316700167150ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU GPL. See the file COPYING. gcc -Wall `pkg-config fuse --cflags --libs` null.c -o null */ #define FUSE_USE_VERSION 26 #include #include #include #include #include static int null_getattr(const char *path, struct stat *stbuf) { if(strcmp(path, "/") != 0) return -ENOENT; stbuf->st_mode = S_IFREG | 0644; stbuf->st_nlink = 1; stbuf->st_uid = getuid(); stbuf->st_gid = getgid(); stbuf->st_size = (1ULL << 32); /* 4G */ stbuf->st_blocks = 0; stbuf->st_atime = stbuf->st_mtime = stbuf->st_ctime = time(NULL); return 0; } static int null_truncate(const char *path, off_t size) { (void) size; if(strcmp(path, "/") != 0) return -ENOENT; return 0; } static int null_open(const char *path, struct fuse_file_info *fi) { (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return 0; } static int null_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { (void) buf; (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return size; } static int null_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { (void) buf; (void) offset; (void) fi; if(strcmp(path, "/") != 0) return -ENOENT; return size; } static struct fuse_operations null_oper = { .getattr = null_getattr, .truncate = null_truncate, .open = null_open, .read = null_read, .write = null_write, }; int main(int argc, char *argv[]) { return fuse_main(argc, argv, &null_oper, NULL); } libfuse-0.0.20140820/fuse.pc.in000066400000000000000000000003671212557316700156130ustar00rootroot00000000000000prefix=@prefix@ exec_prefix=@exec_prefix@ libdir=@libdir@ includedir=@includedir@ Name: fuse Description: Filesystem in Userspace Version: 2.6.5 Libs: -L${libdir} -lfuse Libs.private: -lpthread Cflags: -I${includedir}/fuse -D_FILE_OFFSET_BITS=64 libfuse-0.0.20140820/include/000077500000000000000000000000001212557316700153355ustar00rootroot00000000000000libfuse-0.0.20140820/include/Makefile.am000066400000000000000000000004651212557316700173760ustar00rootroot00000000000000# Makefile.am # Used by automake and configure to create Makefile. # # Copyright (C) 2005,2006 Stefan Siegl , Germany fuseincludedir=$(includedir)/fuse fuseinclude_HEADERS = \ fuse.h \ fuse_opt.h \ fuse_common.h \ fuse_common_compat.h \ fuse_compat.h include_HEADERS = old/fuse.h libfuse-0.0.20140820/include/fuse.h000066400000000000000000000526051212557316700164600ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB. */ #ifndef _FUSE_H_ #define _FUSE_H_ /* This file defines the library interface of FUSE */ /* IMPORTANT: you should define FUSE_USE_VERSION before including this header. To use the newest API define it to 26 (recommended for any new application), to use the old API define it to 21 (default) 22 or 25, to use the even older 1.X API define it to 11. */ #ifndef FUSE_USE_VERSION #define FUSE_USE_VERSION 21 #endif #include "fuse_common.h" #include #include #include #include #include #include #ifdef __cplusplus extern "C" { #endif /* ----------------------------------------------------------- * * Basic FUSE API * * ----------------------------------------------------------- */ /** Handle for a FUSE filesystem */ struct fuse; /** Structure containing a raw command */ struct fuse_cmd; /** Function to add an entry in a readdir() operation * * @param buf the buffer passed to the readdir() operation * @param name the file name of the directory entry * @param stat file attributes, can be NULL * @param off offset of the next entry or zero * @return 1 if buffer is full, zero otherwise */ typedef int (*fuse_fill_dir_t) (void *buf, const char *name, const struct stat *stbuf, off_t off); /* Used by deprecated getdir() method */ typedef struct fuse_dirhandle *fuse_dirh_t; typedef int (*fuse_dirfil_t) (fuse_dirh_t h, const char *name, int type, ino_t ino); /** * The file system operations: * * Most of these should work very similarly to the well known UNIX * file system operations. A major exception is that instead of * returning an error in 'errno', the operation should return the * negated error value (-errno) directly. * * All methods are optional, but some are essential for a useful * filesystem (e.g. getattr). Open, flush, release, fsync, opendir, * releasedir, fsyncdir, access, create, ftruncate, fgetattr, lock, * init and destroy are special purpose methods, without which a full * featured filesystem can still be implemented. */ struct fuse_operations { /** Get file attributes. * * Similar to stat(). The 'st_dev' and 'st_blksize' fields are * ignored. The 'st_ino' field is ignored except if the 'use_ino' * mount option is given. */ int (*getattr) (const char *, struct stat *); /** Read the target of a symbolic link * * The buffer should be filled with a null terminated string. The * buffer size argument includes the space for the terminating * null character. If the linkname is too long to fit in the * buffer, it should be truncated. The return value should be 0 * for success. */ int (*readlink) (const char *, char *, size_t); /* Deprecated, use readdir() instead */ int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t); /** Create a file node * * If the filesystem doesn't define a create() operation, mknod() * will be called for creation of all non-directory, non-symlink * nodes. */ int (*mknod) (const char *, mode_t, dev_t); /** Create a directory */ int (*mkdir) (const char *, mode_t); /** Remove a file */ int (*unlink) (const char *); /** Remove a directory */ int (*rmdir) (const char *); /** Create a symbolic link */ int (*symlink) (const char *, const char *); /** Rename a file */ int (*rename) (const char *, const char *); /** Create a hard link to a file */ int (*link) (const char *, const char *); /** Change the permission bits of a file */ int (*chmod) (const char *, mode_t); /** Change the owner and group of a file */ int (*chown) (const char *, uid_t, gid_t); /** Change the size of a file */ int (*truncate) (const char *, off_t); /** Change the access and/or modification times of a file * * Deprecated, use utimes() instead. */ int (*utime) (const char *, struct utimbuf *); /** File open operation * * No creation, or truncation flags (O_CREAT, O_EXCL, O_TRUNC) * will be passed to open(). Open should check if the operation * is permitted for the given flags. Optionally open may also * return an arbitrary filehandle in the fuse_file_info structure, * which will be passed to all file operations. * * Changed in version 2.2 */ int (*open) (const char *, struct fuse_file_info *); /** Read data from an open file * * Read should return exactly the number of bytes requested except * on EOF or error, otherwise the rest of the data will be * substituted with zeroes. An exception to this is when the * 'direct_io' mount option is specified, in which case the return * value of the read system call will reflect the return value of * this operation. * * Changed in version 2.2 */ int (*read) (const char *, char *, size_t, off_t, struct fuse_file_info *); /** Write data to an open file * * Write should return exactly the number of bytes requested * except on error. An exception to this is when the 'direct_io' * mount option is specified (see read operation). * * Changed in version 2.2 */ int (*write) (const char *, const char *, size_t, off_t, struct fuse_file_info *); /** Get file system statistics * * The 'f_frsize', 'f_favail', 'f_fsid' and 'f_flag' fields are ignored * * Replaced 'struct statfs' parameter with 'struct statvfs' in * version 2.5 */ int (*statfs) (const char *, struct statvfs *); /** Possibly flush cached data * * BIG NOTE: This is not equivalent to fsync(). It's not a * request to sync dirty data. * * Flush is called on each close() of a file descriptor. So if a * filesystem wants to return write errors in close() and the file * has cached dirty data, this is a good place to write back data * and return any errors. Since many applications ignore close() * errors this is not always useful. * * NOTE: The flush() method may be called more than once for each * open(). This happens if more than one file descriptor refers * to an opened file due to dup(), dup2() or fork() calls. It is * not possible to determine if a flush is final, so each flush * should be treated equally. Multiple write-flush sequences are * relatively rare, so this shouldn't be a problem. * * Filesystems shouldn't assume that flush will always be called * after some writes, or that if will be called at all. * * Changed in version 2.2 */ int (*flush) (const char *, struct fuse_file_info *); /** Release an open file * * Release is called when there are no more references to an open * file: all file descriptors are closed and all memory mappings * are unmapped. * * For every open() call there will be exactly one release() call * with the same flags and file descriptor. It is possible to * have a file opened more than once, in which case only the last * release will mean, that no more reads/writes will happen on the * file. The return value of release is ignored. * * Changed in version 2.2 */ int (*release) (const char *, struct fuse_file_info *); /** Synchronize file contents * * If the datasync parameter is non-zero, then only the user data * should be flushed, not the meta data. * * Changed in version 2.2 */ int (*fsync) (const char *, int, struct fuse_file_info *); /** Set extended attributes */ int (*setxattr) (const char *, const char *, const char *, size_t, int); /** Get extended attributes */ int (*getxattr) (const char *, const char *, char *, size_t); /** List extended attributes */ int (*listxattr) (const char *, char *, size_t); /** Remove extended attributes */ int (*removexattr) (const char *, const char *); /** Open directory * * This method should check if the open operation is permitted for * this directory * * Introduced in version 2.3 */ int (*opendir) (const char *, struct fuse_file_info *); /** Read directory * * This supersedes the old getdir() interface. New applications * should use this. * * The filesystem may choose between two modes of operation: * * 1) The readdir implementation ignores the offset parameter, and * passes zero to the filler function's offset. The filler * function will not return '1' (unless an error happens), so the * whole directory is read in a single readdir operation. This * works just like the old getdir() method. * * 2) The readdir implementation keeps track of the offsets of the * directory entries. It uses the offset parameter and always * passes non-zero offset to the filler function. When the buffer * is full (or an error happens) the filler function will return * '1'. * * Introduced in version 2.3 */ int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *); /** Release directory * * Introduced in version 2.3 */ int (*releasedir) (const char *, struct fuse_file_info *); /** Synchronize directory contents * * If the datasync parameter is non-zero, then only the user data * should be flushed, not the meta data * * Introduced in version 2.3 */ int (*fsyncdir) (const char *, int, struct fuse_file_info *); /** * Initialize filesystem * * The return value will passed in the private_data field of * fuse_context to all file operations and as a parameter to the * destroy() method. * * Introduced in version 2.3 * Changed in version 2.6 */ void *(*init) (struct fuse_conn_info *conn); /** * Clean up filesystem * * Called on filesystem exit. * * Introduced in version 2.3 */ void (*destroy) (void *); /** * Check file access permissions * * This will be called for the access() system call. If the * 'default_permissions' mount option is given, this method is not * called. * * This method is not called under Linux kernel versions 2.4.x * * Introduced in version 2.5 */ int (*access) (const char *, int); /** * Create and open a file * * If the file does not exist, first create it with the specified * mode, and then open it. * * If this method is not implemented or under Linux kernel * versions earlier than 2.6.15, the mknod() and open() methods * will be called instead. * * Introduced in version 2.5 */ int (*create) (const char *, mode_t, struct fuse_file_info *); /** * Change the size of an open file * * This method is called instead of the truncate() method if the * truncation was invoked from an ftruncate() system call. * * If this method is not implemented or under Linux kernel * versions earlier than 2.6.15, the truncate() method will be * called instead. * * Introduced in version 2.5 */ int (*ftruncate) (const char *, off_t, struct fuse_file_info *); /** * Get attributes from an open file * * This method is called instead of the getattr() method if the * file information is available. * * Currently this is only called after the create() method if that * is implemented (see above). Later it may be called for * invocations of fstat() too. * * Introduced in version 2.5 */ int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *); /** * Perform POSIX file locking operation * * The cmd argument will be either F_GETLK, F_SETLK or F_SETLKW. * * For the meaning of fields in 'struct flock' see the man page * for fcntl(2). The l_whence field will always be set to * SEEK_SET. * * For checking lock ownership, the 'fuse_file_info->owner' * argument must be used. * * For F_GETLK operation, the library will first check currently * held locks, and if a conflicting lock is found it will return * information without calling this method. This ensures, that * for local locks the l_pid field is correctly filled in. The * results may not be accurate in case of race conditions and in * the presence of hard links, but it's unlikly that an * application would rely on accurate GETLK results in these * cases. If a conflicting lock is not found, this method will be * called, and the filesystem may fill out l_pid by a meaningful * value, or it may leave this field zero. * * For F_SETLK and F_SETLKW the l_pid field will be set to the pid * of the process performing the locking operation. * * Note: if this method is not implemented, the kernel will still * allow file locking to work locally. Hence it is only * interesting for network filesystems and similar. * * Introduced in version 2.6 */ int (*lock) (const char *, struct fuse_file_info *, int cmd, struct flock *); /** * Change the access and modification times of a file with * nanosecond resolution * * Introduced in version 2.6 */ int (*utimens) (const char *, const struct timespec tv[2]); /** * Map block index within file to block index within device * * Note: This makes sense only for block device backed filesystems * mounted with the 'blkdev' option * * Introduced in version 2.6 */ int (*bmap) (const char *, size_t blocksize, uint64_t *idx); }; /** Extra context that may be needed by some filesystems * * The uid, gid and pid fields are not filled in case of a writepage * operation. */ struct fuse_context { /** Pointer to the fuse object */ struct fuse *fuse; /** User ID of the calling process */ uid_t uid; /** Group ID of the calling process */ gid_t gid; /** Thread ID of the calling process */ pid_t pid; /** Private filesystem data */ void *private_data; }; /* * Main function of FUSE. * * This is for the lazy. This is all that has to be called from the * main() function. * * This function does the following: * - parses command line options (-d -s and -h) * - passes relevant mount options to the fuse_mount() * - installs signal handlers for INT, HUP, TERM and PIPE * - registers an exit handler to unmount the filesystem on program exit * - creates a fuse handle * - registers the operations * - calls either the single-threaded or the multi-threaded event loop * * Note: this is currently implemented as a macro. * * @param argc the argument counter passed to the main() function * @param argv the argument vector passed to the main() function * @param op the file system operation * @param user_data user data set in context for init() method * @return 0 on success, nonzero on failure */ /* int fuse_main(int argc, char *argv[], const struct fuse_operations *op, void *user_data); */ #define fuse_main(argc, argv, op, user_data) \ fuse_main_real(argc, argv, op, sizeof(*(op)), user_data) /* ----------------------------------------------------------- * * More detailed API * * ----------------------------------------------------------- */ /** * Create a new FUSE filesystem. * * @param ch the communication channel * @param args argument vector * @param op the operations * @param op_size the size of the fuse_operations structure * @param user_data user data set in context for init() method * @return the created FUSE handle */ struct fuse *fuse_new(struct fuse_chan *ch, struct fuse_args *args, const struct fuse_operations *op, size_t op_size, void *user_data); /** * Destroy the FUSE handle. * * The communication channel attached to the handle is also destroyed. * * NOTE: This function does not unmount the filesystem. If this is * needed, call fuse_unmount() before calling this function. * * @param f the FUSE handle */ void fuse_destroy(struct fuse *f); /** * FUSE event loop. * * Requests from the kernel are processed, and the appropriate * operations are called. * * @param f the FUSE handle * @return 0 if no error occurred, -1 otherwise */ int fuse_loop(struct fuse *f); /** * Exit from event loop * * @param f the FUSE handle */ void fuse_exit(struct fuse *f); /** * FUSE event loop with multiple threads * * Requests from the kernel are processed, and the appropriate * operations are called. Request are processed in parallel by * distributing them between multiple threads. * * Calling this function requires the pthreads library to be linked to * the application. * * @param f the FUSE handle * @return 0 if no error occurred, -1 otherwise */ int fuse_loop_mt(struct fuse *f); /** * Get the current context * * The context is only valid for the duration of a filesystem * operation, and thus must not be stored and used later. * * @return the context */ struct fuse_context *fuse_get_context(void); /** * Check if a request has already been interrupted * * @param req request handle * @return 1 if the request has been interrupted, 0 otherwise */ int fuse_interrupted(void); /** * Obsolete, doesn't do anything * * @return -EINVAL */ int fuse_invalidate(struct fuse *f, const char *path); /* Deprecated, don't use */ int fuse_is_lib_option(const char *opt); /** * The real main function * * Do not call this directly, use fuse_main() */ int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op, size_t op_size, void *user_data); /* ----------------------------------------------------------- * * Advanced API for event handling, don't worry about this... * * ----------------------------------------------------------- */ /* NOTE: the following functions are deprecated, and will be removed from the 3.0 API. Use the lowlevel session functions instead */ /** Function type used to process commands */ typedef void (*fuse_processor_t)(struct fuse *, struct fuse_cmd *, void *); /** This is the part of fuse_main() before the event loop */ struct fuse *fuse_setup(int argc, char *argv[], const struct fuse_operations *op, size_t op_size, char **mountpoint, int *multithreaded, void *user_data); /** This is the part of fuse_main() after the event loop */ void fuse_teardown(struct fuse *fuse, char *mountpoint); /** Read a single command. If none are read, return NULL */ struct fuse_cmd *fuse_read_cmd(struct fuse *f); /** Process a single command */ void fuse_process_cmd(struct fuse *f, struct fuse_cmd *cmd); /** Multi threaded event loop, which calls the custom command processor function */ int fuse_loop_mt_proc(struct fuse *f, fuse_processor_t proc, void *data); /** Return the exited flag, which indicates if fuse_exit() has been called */ int fuse_exited(struct fuse *f); /** This function is obsolete and implemented as a no-op */ void fuse_set_getcontext_func(struct fuse_context *(*func)(void)); /** Get session from fuse object */ struct fuse_session *fuse_get_session(struct fuse *f); /* ----------------------------------------------------------- * * Compatibility stuff * * ----------------------------------------------------------- */ #if FUSE_USE_VERSION < 26 # include "fuse_compat.h" # undef fuse_main # if FUSE_USE_VERSION == 25 # define fuse_main(argc, argv, op) \ fuse_main_real_compat25(argc, argv, op, sizeof(*(op))) # define fuse_new fuse_new_compat25 # define fuse_setup fuse_setup_compat25 # define fuse_teardown fuse_teardown_compat22 # define fuse_operations fuse_operations_compat25 # elif FUSE_USE_VERSION == 22 # define fuse_main(argc, argv, op) \ fuse_main_real_compat22(argc, argv, op, sizeof(*(op))) # define fuse_new fuse_new_compat22 # define fuse_setup fuse_setup_compat22 # define fuse_teardown fuse_teardown_compat22 # define fuse_operations fuse_operations_compat22 # define fuse_file_info fuse_file_info_compat # elif FUSE_USE_VERSION == 24 # error Compatibility with high-level API version 24 not supported # else # define fuse_dirfil_t fuse_dirfil_t_compat # define __fuse_read_cmd fuse_read_cmd # define __fuse_process_cmd fuse_process_cmd # define __fuse_loop_mt fuse_loop_mt_proc # if FUSE_USE_VERSION == 21 # define fuse_operations fuse_operations_compat2 # define fuse_main fuse_main_compat2 # define fuse_new fuse_new_compat2 # define __fuse_setup fuse_setup_compat2 # define __fuse_teardown fuse_teardown_compat22 # define __fuse_exited fuse_exited # define __fuse_set_getcontext_func fuse_set_getcontext_func # else # define fuse_statfs fuse_statfs_compat1 # define fuse_operations fuse_operations_compat1 # define fuse_main fuse_main_compat1 # define fuse_new fuse_new_compat1 # define FUSE_DEBUG FUSE_DEBUG_COMPAT1 # endif # endif #endif #ifdef __cplusplus } #endif #endif /* _FUSE_H_ */ libfuse-0.0.20140820/include/fuse_common.h000066400000000000000000000144251212557316700200260ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB. */ #if !defined(_FUSE_H_) && !defined(_FUSE_LOWLEVEL_H_) #error "Never include directly; use or /** Major version of FUSE library interface */ #define FUSE_MAJOR_VERSION 2 /** Minor version of FUSE library interface */ #define FUSE_MINOR_VERSION 6 #define FUSE_MAKE_VERSION(maj, min) ((maj) * 10 + (min)) #define FUSE_VERSION FUSE_MAKE_VERSION(FUSE_MAJOR_VERSION, FUSE_MINOR_VERSION) /* This interface uses 64 bit off_t */ #if _FILE_OFFSET_BITS != 64 #error Please add -D_FILE_OFFSET_BITS=64 to your compile flags! #endif #ifdef __cplusplus extern "C" { #endif /** * Information about open files * * Changed in version 2.5 */ struct fuse_file_info { /** Open flags. Available in open() and release() */ int flags; /** Old file handle, don't use */ unsigned long fh_old; /** In case of a write operation indicates if this was caused by a writepage */ int writepage; /** Can be filled in by open, to use direct I/O on this file. Introduced in version 2.4 */ unsigned int direct_io : 1; /** Can be filled in by open, to indicate, that cached file data need not be invalidated. Introduced in version 2.4 */ unsigned int keep_cache : 1; /** Indicates a flush operation. Set in flush operation, also maybe set in highlevel lock operation and lowlevel release operation. Introduced in version 2.6 */ unsigned int flush : 1; /** Padding. Do not use*/ unsigned int padding : 29; /** File handle. May be filled in by filesystem in open(). Available in all other file operations */ uint64_t fh; /** Lock owner id. Available in locking operations and flush */ uint64_t lock_owner; }; /** * Connection information, passed to the ->init() method * * Some of the elements are read-write, these can be changed to * indicate the value requested by the filesystem. The requested * value must usually be smaller than the indicated value. */ struct fuse_conn_info { /** * Major version of the protocol (read-only) */ unsigned proto_major; /** * Minor version of the protocol (read-only) */ unsigned proto_minor; /** * Is asynchronous read supported (read-write) */ unsigned async_read; /** * Maximum size of the write buffer */ unsigned max_write; /** * Maximum readahead */ unsigned max_readahead; /** * For future use. */ unsigned reserved[27]; }; struct fuse_session; struct fuse_chan; /** * Create a FUSE mountpoint * * Returns a control file descriptor suitable for passing to * fuse_new() * * @param mountpoint the mount point path * @param args argument vector * @return the communication channel on success, NULL on failure */ struct fuse_chan *fuse_mount(const char *mountpoint, struct fuse_args *args); /** * Umount a FUSE mountpoint * * @param mountpoint the mount point path * @param ch the communication channel */ void fuse_unmount(const char *mountpoint, struct fuse_chan *ch); /** * Parse common options * * The following options are parsed: * * '-f' foreground * '-d' '-odebug' foreground, but keep the debug option * '-s' single threaded * '-h' '--help' help * '-ho' help without header * '-ofsname=..' file system name, if not present, then set to the program * name * * All parameters may be NULL * * @param args argument vector * @param mountpoint the returned mountpoint, should be freed after use * @param multithreaded set to 1 unless the '-s' option is present * @param foreground set to 1 if one of the relevant options is present * @return 0 on success, -1 on failure */ int fuse_parse_cmdline(struct fuse_args *args, char **mountpoint, int *multithreaded, int *foreground); int fuse_daemonize(int foreground); /* ----------------------------------------------------------- * * Signal handling * * ----------------------------------------------------------- */ /** * Exit session on HUP, TERM and INT signals and ignore PIPE signal * * Stores session in a global variable. May only be called once per * process until fuse_remove_signal_handlers() is called. * * @param se the session to exit * @return 0 on success, -1 on failure */ int fuse_set_signal_handlers(struct fuse_session *se); /** * Restore default signal handlers * * Resets global session. After this fuse_set_signal_handlers() may * be called again. * * @param se the same session as given in fuse_set_signal_handlers() */ void fuse_remove_signal_handlers(struct fuse_session *se); /* ----------------------------------------------------------- * * Compatibility stuff * * ----------------------------------------------------------- */ #if FUSE_USE_VERSION < 26 # if defined(__FreeBSD__) || defined(__GNU__) # if FUSE_USE_VERSION < 25 # error On FreeBSD and Hurd API version 25 or greater must be used # endif # endif # include "fuse_common_compat.h" # undef FUSE_MINOR_VERSION # undef fuse_main # define fuse_unmount fuse_unmount_compat22 # if FUSE_USE_VERSION == 25 # define FUSE_MINOR_VERSION 5 # define fuse_mount fuse_mount_compat25 # elif FUSE_USE_VERSION == 24 || FUSE_USE_VERSION == 22 # define FUSE_MINOR_VERSION 4 # define fuse_mount fuse_mount_compat22 # elif FUSE_USE_VERSION == 21 # define FUSE_MINOR_VERSION 1 # define fuse_mount fuse_mount_compat22 # elif FUSE_USE_VERSION == 11 # warning Compatibility with API version 11 is deprecated # undef FUSE_MAJOR_VERSION # define FUSE_MAJOR_VERSION 1 # define FUSE_MINOR_VERSION 1 # define fuse_mount fuse_mount_compat1 # else # error Compatibility with API version other than 21, 22, 24, 25 and 11 not supported # endif #endif #ifdef __cplusplus } #endif #endif /* _FUSE_COMMON_H_ */ libfuse-0.0.20140820/include/fuse_common_compat.h000066400000000000000000000013401212557316700213610ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB. */ /* these definitions provide source compatibility to prior versions. Do not include this file directly! */ struct fuse_file_info_compat { int flags; unsigned long fh; int writepage; unsigned int direct_io : 1; unsigned int keep_cache : 1; }; int fuse_mount_compat25(const char *mountpoint, struct fuse_args *args); int fuse_mount_compat22(const char *mountpoint, const char *opts); int fuse_mount_compat1(const char *mountpoint, const char *args[]); void fuse_unmount_compat22(const char *mountpoint); libfuse-0.0.20140820/include/fuse_compat.h000066400000000000000000000211211212557316700200100ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB. */ /* these definitions provide source compatibility to prior versions. Do not include this file directly! */ struct fuse_operations_compat25 { int (*getattr) (const char *, struct stat *); int (*readlink) (const char *, char *, size_t); int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t); int (*mknod) (const char *, mode_t, dev_t); int (*mkdir) (const char *, mode_t); int (*unlink) (const char *); int (*rmdir) (const char *); int (*symlink) (const char *, const char *); int (*rename) (const char *, const char *); int (*link) (const char *, const char *); int (*chmod) (const char *, mode_t); int (*chown) (const char *, uid_t, gid_t); int (*truncate) (const char *, off_t); int (*utime) (const char *, struct utimbuf *); int (*open) (const char *, struct fuse_file_info *); int (*read) (const char *, char *, size_t, off_t, struct fuse_file_info *); int (*write) (const char *, const char *, size_t, off_t, struct fuse_file_info *); int (*statfs) (const char *, struct statvfs *); int (*flush) (const char *, struct fuse_file_info *); int (*release) (const char *, struct fuse_file_info *); int (*fsync) (const char *, int, struct fuse_file_info *); int (*setxattr) (const char *, const char *, const char *, size_t, int); int (*getxattr) (const char *, const char *, char *, size_t); int (*listxattr) (const char *, char *, size_t); int (*removexattr) (const char *, const char *); int (*opendir) (const char *, struct fuse_file_info *); int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *); int (*releasedir) (const char *, struct fuse_file_info *); int (*fsyncdir) (const char *, int, struct fuse_file_info *); void *(*init) (void); void (*destroy) (void *); int (*access) (const char *, int); int (*create) (const char *, mode_t, struct fuse_file_info *); int (*ftruncate) (const char *, off_t, struct fuse_file_info *); int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *); }; struct fuse *fuse_new_compat25(int fd, struct fuse_args *args, const struct fuse_operations_compat25 *op, size_t op_size); int fuse_main_real_compat25(int argc, char *argv[], const struct fuse_operations_compat25 *op, size_t op_size); struct fuse *fuse_setup_compat25(int argc, char *argv[], const struct fuse_operations_compat25 *op, size_t op_size, char **mountpoint, int *multithreaded, int *fd); void fuse_teardown_compat22(struct fuse *fuse, int fd, char *mountpoint); #if !defined(__FreeBSD__) && !defined(__GNU__) #include struct fuse_operations_compat22 { int (*getattr) (const char *, struct stat *); int (*readlink) (const char *, char *, size_t); int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t); int (*mknod) (const char *, mode_t, dev_t); int (*mkdir) (const char *, mode_t); int (*unlink) (const char *); int (*rmdir) (const char *); int (*symlink) (const char *, const char *); int (*rename) (const char *, const char *); int (*link) (const char *, const char *); int (*chmod) (const char *, mode_t); int (*chown) (const char *, uid_t, gid_t); int (*truncate) (const char *, off_t); int (*utime) (const char *, struct utimbuf *); int (*open) (const char *, struct fuse_file_info_compat *); int (*read) (const char *, char *, size_t, off_t, struct fuse_file_info_compat *); int (*write) (const char *, const char *, size_t, off_t, struct fuse_file_info_compat *); int (*statfs) (const char *, struct statfs *); int (*flush) (const char *, struct fuse_file_info_compat *); int (*release) (const char *, struct fuse_file_info_compat *); int (*fsync) (const char *, int, struct fuse_file_info_compat *); int (*setxattr) (const char *, const char *, const char *, size_t, int); int (*getxattr) (const char *, const char *, char *, size_t); int (*listxattr) (const char *, char *, size_t); int (*removexattr) (const char *, const char *); int (*opendir) (const char *, struct fuse_file_info_compat *); int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info_compat *); int (*releasedir) (const char *, struct fuse_file_info_compat *); int (*fsyncdir) (const char *, int, struct fuse_file_info_compat *); void *(*init) (void); void (*destroy) (void *); }; struct fuse *fuse_new_compat22(int fd, const char *opts, const struct fuse_operations_compat22 *op, size_t op_size); struct fuse *fuse_setup_compat22(int argc, char *argv[], const struct fuse_operations_compat22 *op, size_t op_size, char **mountpoint, int *multithreaded, int *fd); int fuse_main_real_compat22(int argc, char *argv[], const struct fuse_operations_compat22 *op, size_t op_size); typedef int (*fuse_dirfil_t_compat) (fuse_dirh_t h, const char *name, int type); struct fuse_operations_compat2 { int (*getattr) (const char *, struct stat *); int (*readlink) (const char *, char *, size_t); int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t_compat); int (*mknod) (const char *, mode_t, dev_t); int (*mkdir) (const char *, mode_t); int (*unlink) (const char *); int (*rmdir) (const char *); int (*symlink) (const char *, const char *); int (*rename) (const char *, const char *); int (*link) (const char *, const char *); int (*chmod) (const char *, mode_t); int (*chown) (const char *, uid_t, gid_t); int (*truncate) (const char *, off_t); int (*utime) (const char *, struct utimbuf *); int (*open) (const char *, int); int (*read) (const char *, char *, size_t, off_t); int (*write) (const char *, const char *, size_t, off_t); int (*statfs) (const char *, struct statfs *); int (*flush) (const char *); int (*release) (const char *, int); int (*fsync) (const char *, int); int (*setxattr) (const char *, const char *, const char *, size_t, int); int (*getxattr) (const char *, const char *, char *, size_t); int (*listxattr) (const char *, char *, size_t); int (*removexattr) (const char *, const char *); }; int fuse_main_compat2(int argc, char *argv[], const struct fuse_operations_compat2 *op); struct fuse *fuse_new_compat2(int fd, const char *opts, const struct fuse_operations_compat2 *op); struct fuse *fuse_setup_compat2(int argc, char *argv[], const struct fuse_operations_compat2 *op, char **mountpoint, int *multithreaded, int *fd); struct fuse_statfs_compat1 { long block_size; long blocks; long blocks_free; long files; long files_free; long namelen; }; struct fuse_operations_compat1 { int (*getattr) (const char *, struct stat *); int (*readlink) (const char *, char *, size_t); int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t_compat); int (*mknod) (const char *, mode_t, dev_t); int (*mkdir) (const char *, mode_t); int (*unlink) (const char *); int (*rmdir) (const char *); int (*symlink) (const char *, const char *); int (*rename) (const char *, const char *); int (*link) (const char *, const char *); int (*chmod) (const char *, mode_t); int (*chown) (const char *, uid_t, gid_t); int (*truncate) (const char *, off_t); int (*utime) (const char *, struct utimbuf *); int (*open) (const char *, int); int (*read) (const char *, char *, size_t, off_t); int (*write) (const char *, const char *, size_t, off_t); int (*statfs) (struct fuse_statfs_compat1 *); int (*release) (const char *, int); int (*fsync) (const char *, int); }; #define FUSE_DEBUG_COMPAT1 (1 << 1) struct fuse *fuse_new_compat1(int fd, int flags, const struct fuse_operations_compat1 *op); void fuse_main_compat1(int argc, char *argv[], const struct fuse_operations_compat1 *op); #endif /* __FreeBSD__ || __GNU__ */ libfuse-0.0.20140820/include/fuse_opt.h000066400000000000000000000161731212557316700173420ustar00rootroot00000000000000/* FUSE: Filesystem in Userspace Copyright (C) 2001-2006 Miklos Szeredi This program can be distributed under the terms of the GNU LGPL. See the file COPYING.LIB. */ #ifndef _FUSE_OPT_H_ #define _FUSE_OPT_H_ /* This file defines the option parsing interface of FUSE */ #ifdef __cplusplus extern "C" { #endif /** * Option description * * This structure describes a single option, and and action associated * with it, in case it matches. * * More than one such match may occur, in which case the action for * each match is executed. * * There are three possible actions in case of a match: * * i) An integer (int or unsigned) variable determined by 'offset' is * set to 'value' * * ii) The processing function is called, with 'value' as the key * * iii) An integer (any) or string (char *) variable determined by * 'offset' is set to the value of an option parameter * * 'offset' should normally be either set to * * - 'offsetof(struct foo, member)' actions i) and iii) * * - -1 action ii) * * The 'offsetof()' macro is defined in the header. * * The template determines which options match, and also have an * effect on the action. Normally the action is either i) or ii), but * if a format is present in the template, then action iii) is * performed. * * The types of templates are: * * 1) "-x", "-foo", "--foo", "--foo-bar", etc. These match only * themselves. Invalid values are "--" and anything beginning * with "-o" * * 2) "foo", "foo-bar", etc. These match "-ofoo", "-ofoo-bar" or * the relevant option in a comma separated option list * * 3) "bar=", "--foo=", etc. These are variations of 1) and 2) * which have a parameter * * 4) "bar=%s", "--foo=%lu", etc. Same matching as above but perform * action iii). * * 5) "-x ", etc. Matches either "-xparam" or "-x param" as * two separate arguments * * 6) "-x %s", etc. Combination of 4) and 5) * * If the format is "%s", memory is allocated for the string unlike * with scanf(). */ struct fuse_opt { /** Matching template and optional parameter formatting */ const char *templ; /** * Offset of variable within 'data' parameter of fuse_opt_parse() * or -1 */ unsigned long offset; /** * Value to set the variable to, or to be passed as 'key' to the * processing function. Ignored if template has a format */ int value; }; /** * Key option. In case of a match, the processing function will be * called with the specified key. */ #define FUSE_OPT_KEY(templ, key) { templ, -1U, key } /** * Last option. An array of 'struct fuse_opt' must end with a NULL * template value */ #define FUSE_OPT_END { .templ = NULL } /** * Argument list */ struct fuse_args { /** Argument count */ int argc; /** Argument vector. NULL terminated */ char **argv; /** Is 'argv' allocated? */ int allocated; }; /** * Initializer for 'struct fuse_args' */ #define FUSE_ARGS_INIT(argc, argv) { argc, argv, 0 } /** * Key value passed to the processing function if an option did not * match any template */ #define FUSE_OPT_KEY_OPT -1 /** * Key value passed to the processing function for all non-options * * Non-options are the arguments beginning with a charater other than * '-' or all arguments after the special '--' option */ #define FUSE_OPT_KEY_NONOPT -2 /** * Special key value for options to keep * * Argument is not passed to processing function, but behave as if the * processing function returned 1 */ #define FUSE_OPT_KEY_KEEP -3 /** * Special key value for options to discard * * Argument is not passed to processing function, but behave as if the * processing function returned zero */ #define FUSE_OPT_KEY_DISCARD -4 /** * Processing function * * This function is called if * - option did not match any 'struct fuse_opt' * - argument is a non-option * - option did match and offset was set to -1 * * The 'arg' parameter will always contain the whole argument or * option including the parameter if exists. A two-argument option * ("-x foo") is always converted to single arguemnt option of the * form "-xfoo" before this function is called. * * Options of the form '-ofoo' are passed to this function without the * '-o' prefix. * * The return value of this function determines whether this argument * is to be inserted into the output argument vector, or discarded. * * @param data is the user data passed to the fuse_opt_parse() function * @param arg is the whole argument or option * @param key determines why the processing function was called * @param outargs the current output argument list * @return -1 on error, 0 if arg is to be discarded, 1 if arg should be kept */ typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key, struct fuse_args *outargs); /** * Option parsing function * * If 'args' was returned from a previous call to fuse_opt_parse() or * it was constructed from * * A NULL 'args' is equivalent to an empty argument vector * * A NULL 'opts' is equivalent to an 'opts' array containing a single * end marker * * A NULL 'proc' is equivalent to a processing function always * returning '1' * * @param args is the input and output argument list * @param data is the user data * @param opts is the option description array * @param proc is the processing function * @return -1 on error, 0 on success */ int fuse_opt_parse(struct fuse_args *args, void *data, const struct fuse_opt opts[], fuse_opt_proc_t proc); /** * Add an option to a comma separated option list * * @param opts is a pointer to an option list, may point to a NULL value * @param opt is the option to add * @return -1 on allocation error, 0 on success */ int fuse_opt_add_opt(char **opts, const char *opt); /** * Add an argument to a NULL terminated argument vector * * @param args is the structure containing the current argument list * @param arg is the new argument to add * @return -1 on allocation error, 0 on success */ int fuse_opt_add_arg(struct fuse_args *args, const char *arg); /** * Add an argument at the specified position in a NULL terminated * argument vector * * Adds the argument to the N-th position. This is useful for adding * options at the beggining of the array which must not come after the * special '--' option. * * @param args is the structure containing the current argument list * @param pos is the position at which to add the argument * @param arg is the new argument to add * @return -1 on allocation error, 0 on success */ int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg); /** * Free the contents of argument list * * The structure itself is not freed * * @param args is the structure containing the argument list */ void fuse_opt_free_args(struct fuse_args *args); /** * Check if an option matches * * @param opts is the option description array * @param opt is the option to match * @return 1 if a match is found, 0 if not */ int fuse_opt_match(const struct fuse_opt opts[], const char *opt); #ifdef __cplusplus } #endif #endif /* _FUSE_OPT_H_ */ libfuse-0.0.20140820/include/old/000077500000000000000000000000001212557316700161135ustar00rootroot00000000000000libfuse-0.0.20140820/include/old/fuse.h000066400000000000000000000003661212557316700172330ustar00rootroot00000000000000/* This header is for compatibility with older software using FUSE. Please use 'pkg-config --cflags fuse' to set include path. The correct usage is still '#include ', not '#include '. */ #include "fuse/fuse.h" libfuse-0.0.20140820/libfuse-test-hello.sh000077500000000000000000000014471212557316700177660ustar00rootroot00000000000000#! /bin/sh do_test() { echo "" echo " *****************************************************" echo " * testing in $1/ ..." echo " ***" make -C $1 hello || { echo "FAILED to compile hello translator from $1/" exit 2 } test -e node && settrans -fg node settrans -fca node $1/hello || { echo "FAILED to set translator $1/hello" exit 2 } test -e node/hello || { echo "node/hello file missing, but should be there." exit 1 } test `stat --format "%s" node/hello` -eq 13 || { echo "node/hello expected to be 13 bytes long." exit 1 } grep -q "Hello World" node/hello || { echo "node/hello doesn't contain 'Hello World'" exit 1 } echo "looks good." echo } # now let's get it on ... for A in example*; do do_test $A || exit 1; done libfuse-0.0.20140820/src/000077500000000000000000000000001212557316700145015ustar00rootroot00000000000000libfuse-0.0.20140820/src/Makefile.am000066400000000000000000000006541212557316700165420ustar00rootroot00000000000000# Makefile.am # Used by automake and configure to create Makefile. # # Copyright (C) 2005,2006 Stefan Siegl , Germany lib_LTLIBRARIES = libfuse.la libfuse_la_LDFLAGS = -version-number 1:0:0 \ -Wl,--version-script,$(srcdir)/fuse_versionscript libfuse_la_SOURCES = \ main.c \ netfs.c \ netnode.c \ node.c noinst_HEADERS = \ fuse_i.h DEFAULT_INCLUDES = -I. -I$(top_srcdir) -I$(top_srcdir)/includelibfuse-0.0.20140820/src/fuse_i.h000066400000000000000000000161631212557316700161330ustar00rootroot00000000000000/********************************************************** * fuse_i.h * * Copyright (C) 2004, 2005, 2006 by Stefan Siegl , Germany * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU General Publice License, * version 2 or any later. The license is contained in the COPYING * file that comes with the libfuse distribution. * * libfuse internals ... */ #ifndef FUSE_INTERNAL_H #define FUSE_INTERNAL_H #ifdef FUSE_USE_VERSION # include "fuse.h" #else # define FUSE_USE_VERSION 26 # include "fuse.h" # include "fuse_compat.h" #endif struct iouser; /* write out message to stderr, that some routine is not yet implemented, * thus misbehaviour must be accepted. */ #define NOT_IMPLEMENTED() \ fprintf(stderr, PACKAGE ": functionality not yet implemented in " \ __FILE__ ":%d\nyou're welcome to put your effort to here.\n\n", \ __LINE__) struct fuse { int version; union { struct fuse_operations_compat25 ops25; struct fuse_operations ops; } op; struct fuse_conn_info conn; void *private_data; }; /* pointer to the fuse structure of this translator process */ extern struct fuse *libfuse_fuse; #define FUSE_OP_HAVE(a) (libfuse_fuse->op.ops.a != NULL) #define FUSE_OP_CALL(a,b...) ({ \ DEBUG("tracing", "FUSE_OP_CALL(%s)\n", #a); \ libfuse_fuse->op.ops.a(b); \ }) #define NN_INFO(dir) ((void *) &(dir)->nn->info.info25) #define NN_INFO_APPLY(node,key) (node)->nn->info.info25.key #define FUSE_SYMVER(x) __asm__(x) extern void update_context_struct(struct iouser *cred, struct fuse *fuse); /***************************************************************************** *** netnodes (in memory representation of libfuse's files or directories) *** *****************************************************************************/ struct netnode; struct netnode { /* full pathname of the referenced file or directory */ char *path; /* inode number assigned to the node, unique id that mustn't be * changed - throughout the life of this translator */ ino_t inode; /* information about the opened file */ union { struct fuse_file_info info25; } info; /* pointer to our parent's netnode, if any */ struct netnode *parent; /* reference to our libnetfs node, if any * (lock must be held on read or write attempt) */ struct node *node; /* lock for *node pointer */ pthread_mutex_t lock; /* whether this is an anonymous node, i.e. it has to be deleted, * after the last node associated to it, was removed. */ unsigned anonymous :1; /* whether the netnode was touched since reading it from disk, * i.e. the was a write access that may not be synced to disk */ unsigned may_need_sync :1; }; /* make a new netnode for a specific path, with specified parent * parent == NULL means root node, i.e. "/" ... */ struct netnode *fuse_make_netnode(struct netnode *parent, const char *path); /* scan the whole netnode hash and call fuse_ops->fsync on every node, * that may be out of sync */ error_t fuse_sync_filesystem(void); /***************************************************************************** *** nodes (structures used by the GNU Hurd, i.e. libnetfs) *** *****************************************************************************/ /* make a new node for a specific netnode */ struct node *fuse_make_node(struct netnode *nn); /***************************************************************************** *** various parameters which can be used to change libfuse's behaviour *** *****************************************************************************/ struct _libfuse_params { /* whether or not the filesystem sets the inode number */ unsigned use_ino : 1; /* whether uid,gid,umask-parameters are specified or not */ unsigned force_uid : 1; unsigned force_gid : 1; unsigned force_umask : 1; /* whether either root or other users should be allowed to use the * filesystem (this overrides uid/gid/umask checking!) */ unsigned deflt_perms : 1; unsigned allow_other : 1; unsigned allow_root : 1; /* whether to disable multithreading (if using fuse_main) */ unsigned disable_mt : 1; /* whether to fork to background or not (if started without settrans) */ unsigned foreground : 1; /* the uid and gid to set and which umask to apply (if bitfields are set) */ uid_t uid; gid_t gid; mode_t umask; }; extern struct _libfuse_params libfuse_params; /* magic number, passed from fuse_mount to fuse_new */ #define FUSE_MAGIC ((int) 0x66757365) /***************************************************************************** *** debug cruft *** *****************************************************************************/ /* the port where to write out debug messages to, NULL to omit these */ extern FILE *debug_port; #define DEBUG(cat,msg...) \ if(debug_port) \ fprintf(debug_port, PACKAGE ": " cat ": " msg) #define FUNC_PROLOGUE_(func_name, fmt...) \ do \ { \ const char *debug_func_name = func_name; \ DEBUG("tracing", "entering %s (" __FILE__ ":%d) ", \ debug_func_name, __LINE__); \ if(debug_port) \ { \ fmt; \ fprintf(debug_port, "\n"); \ } #define FUNC_PROLOGUE(func_name) \ FUNC_PROLOGUE_(func_name, (void)0) #define FUNC_PROLOGUE_FMT(func_name, fmt...) \ FUNC_PROLOGUE_(func_name, fprintf(debug_port, fmt)) #define FUNC_PROLOGUE_NODE(func_name, node) \ FUNC_PROLOGUE_FMT(func_name, "node=%s", (node)->nn->path) #define FUNC_EPILOGUE_NORET() \ DEBUG("tracing", "leaving %s\n", debug_func_name); \ } while(0); #define FUNC_RETURN_(ret, fmt) \ { \ int retval = (ret); \ DEBUG("tracing", "leaving %s (" __FILE__ ":%d) ret=%d ", \ debug_func_name, __LINE__, retval); \ if(debug_port) \ { \ if(retval) \ fprintf(debug_port, "(%s) ", strerror(retval)); \ fmt; \ fprintf(debug_port, "\n"); \ } \ return retval; \ } #define FUNC_EPILOGUE_(ret, fmt) \ FUNC_RETURN_(ret, fmt) \ } while(0) #define FUNC_RETURN_FMT(ret, fmt...) \ FUNC_RETURN_(ret, fprintf(debug_port, fmt)) #define FUNC_EPILOGUE_FMT(ret, fmt...) \ FUNC_EPILOGUE_(ret, fprintf(debug_port, fmt)) #define FUNC_RETURN(ret) \ FUNC_RETURN_(ret, (void)0) #define FUNC_EPILOGUE(ret) \ FUNC_EPILOGUE_(ret, (void)0) /* malloc debugging */ #if 0 static char *_strdup(const char *s, const char *f, int l) { void *ptr = strdup(s); DEBUG("strdup", "ptr=%8p [%s:%d]\n", ptr, f, l); return ptr; } #undef strdup #define strdup(s) _strdup(s, __FILE__, __LINE__) static void *_malloc(size_t sz, const char *f, int l) { void *ptr = malloc(sz); DEBUG("malloc", "ptr=%8p [%s:%d]\n", ptr, f, l); return ptr; } #define malloc(s) _malloc(s, __FILE__, __LINE__) static void _free(void *ptr, const char *f, int l) { DEBUG(" free", "ptr=%8p [%s:%d]\n", ptr, f, l); free(ptr); } #define free(s) _free(s, __FILE__, __LINE__) #endif /* malloc debugging */ #endif /* FUSE_INTERNAL_H */ libfuse-0.0.20140820/src/fuse_versionscript000066400000000000000000000042121212557316700203570ustar00rootroot00000000000000libfuse { global: netfs_*; }; FUSE_2.2 { global: fuse_destroy; fuse_exit; fuse_exited; fuse_get_context; fuse_invalidate; fuse_is_lib_option; fuse_loop; fuse_loop_mt; fuse_loop_mt_proc; fuse_main; fuse_main_compat1; fuse_main_compat2; fuse_mount_compat1; fuse_new_compat1; fuse_new_compat2; fuse_process_cmd; fuse_read_cmd; fuse_set_getcontext_func; fuse_setup_compat2; }; FUSE_2.4 { global: fuse_add_dirent; fuse_chan_bufsize; fuse_chan_data; fuse_chan_destroy; fuse_chan_fd; fuse_chan_new; fuse_chan_receive; fuse_chan_send; fuse_chan_session; fuse_dirent_size; fuse_kern_chan_new; fuse_lowlevel_is_lib_option; fuse_reply_attr; fuse_reply_buf; fuse_reply_entry; fuse_reply_err; fuse_reply_none; fuse_reply_readlink; fuse_reply_write; fuse_reply_xattr; fuse_req_ctx; fuse_req_userdata; fuse_session_add_chan; fuse_session_destroy; fuse_session_exit; fuse_session_exited; fuse_session_loop; fuse_session_loop_mt; fuse_session_new; fuse_session_next_chan; fuse_session_process; fuse_session_reset; } FUSE_2.2; FUSE_2.5 { global: fuse_lowlevel_new_compat; fuse_main_real_compat22; fuse_mount_compat22; fuse_new_compat22; fuse_opt_parse; fuse_opt_add_opt; fuse_opt_add_arg; fuse_opt_free_args; fuse_opt_insert_arg; fuse_opt_match; fuse_parse_cmdline; fuse_remove_signal_handlers; fuse_reply_create; fuse_reply_open; fuse_reply_open_compat; fuse_reply_statfs; fuse_reply_statfs_compat; fuse_setup_compat22; fuse_set_signal_handlers; } FUSE_2.4; FUSE_2.6 { global: fuse_add_direntry; fuse_chan_new; fuse_chan_new_compat24; fuse_chan_recv; fuse_daemonize; fuse_get_session; fuse_interrupted; fuse_lowlevel_new; fuse_lowlevel_new_compat25; fuse_main_real; fuse_main_real_compat25; fuse_mount; fuse_mount_compat25; fuse_new; fuse_new_compat25; fuse_opt_insert_arg; fuse_reply_lock; fuse_req_interrupt_func; fuse_req_interrupted; fuse_session_remove_chan; fuse_setup; fuse_setup_compat25; fuse_teardown; fuse_teardown_compat22; fuse_unmount; fuse_unmount_compat22; local: *; } FUSE_2.5; libfuse-0.0.20140820/src/main.c000066400000000000000000000344111212557316700155740ustar00rootroot00000000000000/********************************************************** * main.c * * Copyright (C) 2004,2005,2006 by Stefan Siegl , Germany * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU General Publice License, * version 2 or any later. The license is contained in the COPYING * file that comes with the libfuse distribution. * * translator startup code (and argp handling) */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #include #include "fuse_i.h" #include "fuse.h" /* global variables, needed for netfs */ char *netfs_server_name = PACKAGE; char *netfs_server_version = VERSION; int netfs_maxsymlinks = 12; /* libfuse filesystem configuration */ struct _libfuse_params libfuse_params = { 0 }; /* pointer to the fuse structure of this translator process */ struct fuse *libfuse_fuse = NULL; /* the key for the fuse_context */ static pthread_key_t libfuse_ctx_key; /* the port where to write out debug messages to, NULL to omit these */ FILE *debug_port = NULL; /* bootstrap fuse translator */ static int fuse_bootstrap(const char *mountpoint); /* Destroy the fuse_context held as TSD. */ static void fuse_destroy_context(void *data) { free(data); } /* Create the TSD key. */ static void fuse_create_key(void) { int err = pthread_key_create(&libfuse_ctx_key, fuse_destroy_context); assert_perror(err); } /* Interpret a __single__ mount option * The option itself `opt' may be modified during this call. */ static int fuse_parse_opt(char *opt) { char *ptrptr; char *option = strtok_r(opt, "=", &ptrptr); char *value = strtok_r(NULL, "=", &ptrptr); DEBUG("parse_opt", "option `%s' => `%s'\n", option, value); if(! strcmp(option, "use_ino")) libfuse_params.use_ino = 1; else if(! strcmp(option, "default_permissions")) libfuse_params.deflt_perms = 1; else if(! strcmp(option, "allow_other")) libfuse_params.allow_other = 1; else if(! strcmp(option, "allow_root")) libfuse_params.allow_root = 1; else if(! strcmp(option, "uid")) { char *endptr; if(! value || (libfuse_params.uid = strtol(value, &endptr, 10), endptr == value)) { fprintf(stderr, PACKAGE_NAME ": missing or invalid argument to " "mount option '%s': %s\n", option, value); return EINVAL; } libfuse_params.force_uid = 1; } else if(! strcmp(option, "gid")) { char *endptr; if(! value || (libfuse_params.gid = strtol(value, &endptr, 10), endptr == value)) { fprintf(stderr, PACKAGE_NAME ": missing or invalid argument to " "mount option '%s': %s\n", option, value); return EINVAL; } libfuse_params.force_gid = 1; } else if(! strcmp(option, "umask")) { char *endptr; if(! value || (libfuse_params.umask = strtol(value, &endptr, 8), endptr == value)) { fprintf(stderr, PACKAGE_NAME ": missing or invalid argument to " "mount option '%s': %s\n", option, value); return EINVAL; } libfuse_params.force_umask = 1; } else if(! strcmp(option, "fsname")) { /* nothing to do for us */ } else { fprintf(stderr, PACKAGE_NAME ": unsupported mount option: %s\n", option); return EINVAL; } return 0; } /* Parse a single (or a comma-separated list) of mount options * (those that are specified using `-o' on the command line for example) */ static int fuse_parse_opts(const char *opts) { if(! opts) return 0; /* ... why did'ya call us? */ char *copy = strdup(opts); /* copy string to allow strtok calls */ if(! copy) return ENOMEM; char *ptrptr, *token, *tok_me = copy; while((token = strtok_r(tok_me, ",", &ptrptr))) { tok_me = NULL; if(fuse_parse_opt(token)) { free(copy); return EINVAL; } } free(copy); return 0; } /* Parse the command line arguments given to fuse_main (or _compat function). * If --help specified, output help string and call exit. If there are any * options that shall be passed to the file system itself, return them. */ static void fuse_parse_argv(int argc, char *argv[]) { const char *translat_path = argv[0]; /* parse command line arguments */ int opt; FILE *opt_help = NULL; while((opt = getopt(argc, argv, "d::o:hsf")) >= 0) switch(opt) { case 'd': if(optarg) debug_port = fopen(optarg, "w"); if(! debug_port) debug_port = stderr; setvbuf(debug_port, NULL, _IONBF, 0); fprintf(debug_port, "translator %s starting up.\n", translat_path); break; case 'o': assert(optarg); if(fuse_parse_opts(optarg)) exit(1); break; case 'h': opt_help = stdout; break; case 's': libfuse_params.disable_mt = 1; break; case 'f': libfuse_params.foreground = 1; break; case '?': default: opt_help = stderr; break; } if(argc - optind > 1) { opt_help = stderr; fprintf(opt_help, "%s: too many command line arguments.\n", argv[0]); } if(opt_help) { fprintf(opt_help, "usage: %s [FUSE options]\n\n" "FUSE Options:\n" " -d[FILENAME] " "enable debug output (default=stderr)\n" " -s disable multi-threaded operation\n" " -f don't fork to background\n" /* " -r " * "mount read only (equivalent to '-o ro')\n" */ " -o opt,[opt...] mount options\n" " -h print help\n" "\n" "Mount options:\n" " default_permissions enable permission checking\n" " allow_other allow access to other users\n" " allow_root allow access to root\n" " use_ino let filesystem set inode numbers\n" /* " readdir_ino " * "try to fill in d_ino in readdir\n" */ " umask set file permissions (octal)\n" " uid set file owner\n" " gid set file group\n", translat_path); exit(opt_help == stdout ? 0 : 1); } /* chop off the consumed args */ argv[0] = argv[optind]; argv[1] = NULL; } int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op, size_t op_size, void *user_data) { fuse_parse_argv(argc, argv); struct fuse_chan *ch = fuse_mount(argv[0], NULL); return (libfuse_params.disable_mt ? fuse_loop : fuse_loop_mt) (fuse_new(ch, NULL, op, op_size, user_data)); } int fuse_main_real_compat25(int argc, char *argv[], const struct fuse_operations_compat25 *op, size_t op_size) { return fuse_main_real(argc, argv, (const struct fuse_operations *) op, op_size, NULL); } #undef fuse_main int fuse_main(void); int fuse_main(void) { fprintf(stderr, "fuse_main is supposed to be used via the macro, not the symbol\n"); return -1; } /* Create a new FUSE filesystem, actually there's nothing for us to do * on the Hurd. Hmm. */ struct fuse * fuse_new(struct fuse_chan *ch, struct fuse_args *args, const struct fuse_operations *op, size_t op_size, void *user_data) { struct fuse *new; if(ch != (void *) FUSE_MAGIC) return NULL; if(args && args->allocated) { int i; for(i = 0; i < args->argc; i ++) if(fuse_parse_opt(args->argv[i])) return NULL; } new = calloc(1, sizeof *new); if(! new) return NULL; switch (op_size) { case sizeof(new->op.ops25): new->version = 25; break; case sizeof(new->op.ops): new->version = 26; break; default: fprintf(stderr, "Unhandled size of fuse_operations: %d\n", op_size); fprintf(stderr, "libfuse will abort now\n"); abort(); } memcpy(&new->op, op, op_size); /* FIXME: figure out better values for fuse_conn_info fields. */ new->conn.proto_major = FUSE_MAJOR_VERSION; new->conn.proto_minor = FUSE_MINOR_VERSION; new->conn.async_read = 1; new->conn.max_write = UINT_MAX; new->conn.max_readahead = UINT_MAX; update_context_struct(NULL, new); fuse_get_context()->private_data = user_data; if(new->op.ops.init != NULL) { if (new->version >= 26) new->private_data = new->op.ops.init(&new->conn); else new->private_data = new->op.ops25.init(); } update_context_struct(NULL, NULL); return new; } struct fuse * fuse_new_compat25(int fd, struct fuse_args *args, const struct fuse_operations_compat25 *op, size_t op_size) { return fuse_new((struct fuse_chan *) fd, args, (const struct fuse_operations *) op, op_size, NULL); } /* Create a new mountpoint for our fuse filesystem, i.e. do the netfs * initialization stuff ... */ struct fuse_chan * fuse_mount(const char *mountpoint, struct fuse_args *args) { if(args && args->allocated) { int i; for(i = 0; i < args->argc; i ++) if(fuse_parse_opt(args->argv[i])) return NULL; } return (struct fuse_chan *) fuse_bootstrap(mountpoint); } int fuse_mount_compat25(const char *mountpoint, struct fuse_args *args) { if(args && args->allocated) { int i; for(i = 0; i < args->argc; i ++) if(fuse_parse_opt(args->argv[i])) return 0; } return fuse_bootstrap(mountpoint); } static int fuse_bootstrap(const char *mountpoint) { mach_port_t bootstrap, ul_node; task_get_bootstrap_port(mach_task_self(), &bootstrap); if(! mountpoint || bootstrap) { netfs_init(); ul_node = netfs_startup(bootstrap, 0); } else { /* * we don't have a bootstrap port, i.e. we were not started using * settrans, but know the mountpoint, therefore try to become * a translator the hard way ... */ ul_node = file_name_lookup(mountpoint, 0, 0); if(ul_node == MACH_PORT_NULL) error(10, 0, "Unable to access underlying node"); /* fork first, we are expected to act from the background */ pid_t pid = libfuse_params.foreground ? 0 : fork(); if(pid < 0) { perror(PACKAGE ": failed to fork to background"); exit(1); } else if(pid) exit(0); /* parent process */ /* finally try to get it on ... */ netfs_init(); struct port_info *newpi; error_t err = ports_create_port(netfs_control_class, netfs_port_bucket, sizeof(struct port_info), &newpi); if(! err) { mach_port_t right = ports_get_send_right(newpi); err = file_set_translator(ul_node, 0, FS_TRANS_SET, 0, "", 0, right, MACH_MSG_TYPE_COPY_SEND); mach_port_deallocate(mach_task_self(), right); ports_port_deref(newpi); } if(err) error(11, err, "Translator startup failure: fuse_mount_compat22"); } /* create our root node */ { struct netnode *root = fuse_make_netnode(NULL, "/"); netfs_root_node = fuse_make_node(root); } if(! netfs_root_node) { perror(PACKAGE ": cannot create rootnode"); return -EAGAIN; } return FUSE_MAGIC; } int fuse_loop(struct fuse *f) { if(! f) return -1; static int server_timeout = 1000 * 60 * 10; /* ten minutes, just like in * init-loop.c of libnetfs */ libfuse_fuse = f; ports_manage_port_operations_one_thread(netfs_port_bucket, netfs_demuxer, server_timeout); return 0; } struct fuse_cmd { mach_msg_header_t *inp; mach_msg_header_t *outp; int return_value; }; static fuse_processor_t fuse_proc = NULL; static void *fuse_proc_data; static int fuse_demuxer(mach_msg_header_t *inp, mach_msg_header_t *outp) { struct fuse_cmd cmd; cmd.inp = inp; cmd.outp = outp; fuse_proc(libfuse_fuse, &cmd, fuse_proc_data); return cmd.return_value; } void fuse_process_cmd(struct fuse *f, struct fuse_cmd *cmd) { if(! f) { cmd->return_value = -1; return; } int netfs_fs_server (mach_msg_header_t *, mach_msg_header_t *); int netfs_io_server (mach_msg_header_t *, mach_msg_header_t *); int netfs_fsys_server (mach_msg_header_t *, mach_msg_header_t *); int netfs_ifsock_server (mach_msg_header_t *, mach_msg_header_t *); mach_msg_header_t *inp = cmd->inp; mach_msg_header_t *outp = cmd->outp; cmd->return_value = (netfs_io_server (inp, outp) || netfs_fs_server (inp, outp) || ports_notify_server (inp, outp) || netfs_fsys_server (inp, outp) || ports_interrupt_server (inp, outp) || netfs_ifsock_server (inp, outp)); } int fuse_loop_mt_proc(struct fuse *f, fuse_processor_t proc, void *data) { static int thread_timeout = 1000 * 60 * 2; /* two minutes */ static int server_timeout = 1000 * 60 * 10; /* ten minutes, just like in * init-loop.c of libnetfs */ if(! f) return -1; /* copy the provided arguments to global variables to make them available * to fuse_demuxer ... */ fuse_proc = proc; fuse_proc_data = data; libfuse_fuse = f; ports_manage_port_operations_multithread(netfs_port_bucket, fuse_demuxer, thread_timeout, server_timeout, 0); return 0; } int fuse_loop_mt(struct fuse *f) { if (f == NULL) return -1; return fuse_loop_mt_proc(f, (fuse_processor_t) fuse_process_cmd, NULL); } void fuse_exit(struct fuse *f) { (void) f; /* * well, we should make fuse_main exit, this is, we would have to * cancel ports_manage_port_operations_one_thread. however this is * not possible, therefore buy the farm for the moment. */ error(1, EIEIO, "fuse_exit called"); } int fuse_exited(struct fuse *f) { (void) f; /* * if fuse_exit is called, we buy the farm, therefore we still must be alive. */ return 0; } struct fuse_context * fuse_get_context(void) { static pthread_once_t libfuse_ctx_key_once = PTHREAD_ONCE_INIT; pthread_once(&libfuse_ctx_key_once, fuse_create_key); struct fuse_context *ctx = pthread_getspecific(libfuse_ctx_key); if(! ctx) { ctx = calloc(1, sizeof(*ctx)); if(! ctx) { fprintf(stderr, "Cannot allocate a new fuse_context\n"); fprintf(stderr, "libfuse will abort now\n"); abort(); } pthread_setspecific(libfuse_ctx_key, ctx); } return ctx; } int fuse_invalidate(struct fuse *f, const char *path) { (void) f; (void) path; return -EINVAL; } FUSE_SYMVER(".symver fuse_main_real_compat25,fuse_main_real@FUSE_2.5"); FUSE_SYMVER(".symver fuse_new_compat25,fuse_new@FUSE_2.5"); FUSE_SYMVER(".symver fuse_mount_compat25,fuse_mount@FUSE_2.5"); libfuse-0.0.20140820/src/netfs.c000066400000000000000000001206621212557316700157730ustar00rootroot00000000000000/********************************************************** * netfs.c * * Copyright(C) 2004,2005,2006 by Stefan Siegl , Germany * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU General Publice License, * version 2 or any later. The license is contained in the COPYING * file that comes with the libfuse distribution. * * callback functions for libnetfs */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #include #include #include #include #include #include "fuse_i.h" #include "fuse.h" /* fuse_dirhandle, passed to ops->getdir to store our information */ struct fuse_dirhandle { int first_entry; /* index of first entry to return (counted down * in helper function) */ int num_entries; /* number of further entries we may write out to the * buffer, counted down in callback function*/ int count; /* number of elements, we already wrote to buffer */ size_t size; /* number of further bytes we may write to buffer */ struct dirent *hdrpos; /* where to write next dirent structure */ size_t maxlen; /* (allocated) length of filename field, def 256 */ struct netnode *parent; /* netnode of the dir which's content we list */ char *abspath; char *filename; }; static inline void refresh_context_struct(struct iouser *cred) { update_context_struct(cred, libfuse_fuse); } void update_context_struct(struct iouser *cred, struct fuse *fuse) { FUNC_PROLOGUE("refresh_context_struct"); struct fuse_context *ctx = fuse_get_context(); ctx->fuse = fuse; ctx->private_data = ctx->fuse ? ctx->fuse->private_data : NULL; if(cred) { ctx->uid = cred->uids->num ? cred->uids->ids[0] : (libfuse_params.force_uid ? libfuse_params.uid : geteuid()); ctx->gid = cred->gids->num ? cred->gids->ids[0] : (libfuse_params.force_gid ? libfuse_params.gid : getegid()); } else { ctx->uid = libfuse_params.force_uid ? libfuse_params.uid : geteuid(); ctx->gid = libfuse_params.force_gid ? libfuse_params.gid : getegid(); } FUNC_EPILOGUE_NORET(); } /* Check whether to allow access to a node, testing the allow_root and * allow_other flag. This does not check whether default permissions * are okay to allow access. * * Return: 0 if access is to be granted, EPERM otherwise * * Sidenote: This function is mainly called from netfs_validate_stat which in * turn is called by any other of the netfs-operation-functions. This * is, we don't have to call this from all of the operation-functions * since netfs_validate_stat is called anyways! */ static error_t test_allow_root_or_other (struct iouser *cred) { FUNC_PROLOGUE("test_allow_root_or_other"); assert(cred); /* if allow_other is set, access is okay in any case */ if(libfuse_params.allow_other) FUNC_RETURN_FMT(0, "allow_other is set"); unsigned int i; uid_t proc_uid = getuid(); for(i = 0; i < cred->uids->num; i ++) { DEBUG("test_allow", "testing for uid=%d\n", cred->uids->ids[i]); if(cred->uids->ids[i] == 0 && libfuse_params.allow_root) FUNC_RETURN_FMT(0, "allowing access for root"); if(cred->uids->ids[i] == proc_uid) FUNC_RETURN_FMT(0, "allowing access for owner"); } /* iouser is not the "filesystem-owner" and allow_other is not set, * or iouser is root but allow_root is not set either */ FUNC_EPILOGUE(EPERM); } /* Make sure that NP->nn_stat is filled with current information. CRED identifies the user responsible for the operation. If the user `CRED' is not allowed to perform any operation (considering the allow_root and allow_other flags), return EPERM. */ error_t netfs_validate_stat (struct node *node, struct iouser *cred) { FUNC_PROLOGUE_NODE("netfs_validate_stat", node); error_t err = EOPNOTSUPP; if(test_allow_root_or_other(cred)) FUNC_RETURN(EPERM); if(FUSE_OP_HAVE(getattr)) { refresh_context_struct(cred); err = -FUSE_OP_CALL(getattr, node->nn->path, &node->nn_stat); } if(! err) { if(! libfuse_params.use_ino) node->nn_stat.st_ino = node->nn->inode; node->nn_stat.st_dev = getpid(); node->nn_stat.st_blksize = 1 << 12; /* there's probably no sane default, * use 4 kB for the moment */ if(libfuse_params.force_uid) node->nn_stat.st_uid = libfuse_params.uid; if(libfuse_params.force_gid) node->nn_stat.st_gid = libfuse_params.gid; if(libfuse_params.force_umask) node->nn_stat.st_mode &= ~libfuse_params.umask; } FUNC_EPILOGUE(err); } /* Read the contents of NODE (a symlink), for USER, into BUF. */ error_t netfs_attempt_readlink (struct iouser *user, struct node *node, char *buf) { FUNC_PROLOGUE_NODE("netfs_attempt_readlink", node); error_t err; if((err = netfs_validate_stat(node, user)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IREAD, user)))) goto out; if(FUSE_OP_HAVE(readlink)) err = -FUSE_OP_CALL(readlink, node->nn->path, buf, node->nn_stat.st_size + 1); else err = EOPNOTSUPP; out: FUNC_EPILOGUE(err); } /* Attempt to create a file named NAME in DIR for USER with MODE. Set *NODE to the new node upon return. On any error, clear *NODE. *NODE should be locked on success; no matter what, unlock DIR before returning. */ error_t netfs_attempt_create_file (struct iouser *user, struct node *dir, char *name, mode_t mode, struct node **node) { FUNC_PROLOGUE("netfs_attempt_create_file"); error_t err; char *path = NULL; if((err = netfs_validate_stat(dir, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&dir->nn_stat, NULL, user)))) goto out; if(! FUSE_OP_HAVE(mknod)) { err = EOPNOTSUPP; goto out; } if(! (path = malloc(strlen(dir->nn->path) + strlen(name) + 2))) { err = ENOMEM; goto out; } sprintf(path, "%s/%s", dir->nn->path, name); /* FUSE expects us to use mknod function to create files. This is allowed * on Linux, however neither the Hurd nor the POSIX standard consider that */ err = -FUSE_OP_CALL(mknod, path, (mode & ALLPERMS) | S_IFREG, 0); out: if(err) *node = NULL; else { /* create a new (net-)node for this file */ struct netnode *nn = fuse_make_netnode(dir->nn, path); if(nn) { nn->may_need_sync = 1; *node = fuse_make_node(nn); } else { *node = NULL; err = ENOMEM; } } free(path); /* fuse_make_netnode strdup'ed it. */ if(*node) pthread_mutex_lock(&(*node)->lock); pthread_mutex_unlock (&dir->lock); FUNC_EPILOGUE(err); } /* This should attempt a chmod call for the user specified by CRED on node NODE, to change the owner to UID and the group to GID. */ error_t netfs_attempt_chown (struct iouser *cred, struct node *node, uid_t uid, uid_t gid) { FUNC_PROLOGUE_NODE("netfs_attempt_chown", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_isowner(&node->nn_stat, cred)))) goto out; if(! FUSE_OP_HAVE(chown)) { err = EOPNOTSUPP; goto out; } /* FIXME, make sure, that user CRED is not able to change permissions * to somebody who is not. That is, don't allow $unpriv_user to change * owner to e.g. root. */ err = -FUSE_OP_CALL(chown, node->nn->path, uid, gid); node->nn->may_need_sync = 1; out: FUNC_EPILOGUE(err); } /* This should attempt to fetch filesystem status information for the remote filesystem, for the user CRED. */ error_t netfs_attempt_statfs (struct iouser *cred, struct node *node, fsys_statfsbuf_t *st) { FUNC_PROLOGUE_NODE("netfs_attempt_statfs", node); error_t err; if(test_allow_root_or_other(cred)) err = EPERM; else if(FUSE_OP_HAVE(statfs)) { struct statvfs stvfs; refresh_context_struct(cred); err = -FUSE_OP_CALL(statfs, node->nn->path, &stvfs); if(! err) { st->f_type = stvfs.__f_type; st->f_bsize = stvfs.f_bsize; st->f_blocks = stvfs.f_blocks; st->f_bfree = stvfs.f_bfree; st->f_bavail = stvfs.f_bavail; st->f_files = stvfs.f_files; st->f_ffree = stvfs.f_ffree; st->f_fsid = stvfs.f_fsid; st->f_namelen = stvfs.f_namemax; st->f_favail = stvfs.f_favail; st->f_frsize = stvfs.f_frsize; st->f_flag = stvfs.f_flag; } } else err = EOPNOTSUPP; FUNC_EPILOGUE(err); } /* Attempt to create a new directory named NAME in DIR for USER with mode MODE. */ error_t netfs_attempt_mkdir (struct iouser *user, struct node *dir, char *name, mode_t mode) { FUNC_PROLOGUE("netfs_attempt_mkdir"); error_t err; char *path = NULL; if((err = netfs_validate_stat(dir, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&dir->nn_stat, NULL, user)))) goto out; if(! FUSE_OP_HAVE(mkdir)) { err = EOPNOTSUPP; goto out; } if(! (path = malloc(strlen(dir->nn->path) + strlen(name) + 2))) { err = ENOMEM; goto out; } sprintf(path, "%s/%s", dir->nn->path, name); err = -FUSE_OP_CALL(mkdir, path, mode & ALLPERMS); out: /* we don't need to make a netnode already, lookup will be called and do * that for us. * * FIXME we must make sure, that the netnode will have may_need_sync is set */ free(path); FUNC_EPILOGUE(err); } /* This should attempt a chflags call for the user specified by CRED on node NODE, to change the flags to FLAGS. */ error_t netfs_attempt_chflags (struct iouser *cred, struct node *node, int flags) { (void) cred; (void) flags; FUNC_PROLOGUE_NODE("netfs_attempt_chflags", node); NOT_IMPLEMENTED(); FUNC_EPILOGUE(EOPNOTSUPP); } /* Node NODE is being opened by USER, with FLAGS. NEWNODE is nonzero if we just created this node. Return an error if we should not permit the open to complete because of a permission restriction. */ error_t netfs_check_open_permissions (struct iouser *user, struct node *node, int flags, int newnode) { (void) newnode; FUNC_PROLOGUE_FMT("netfs_check_open_permissions", "node=%s, flags=%d", node->nn->path, flags); error_t err = 0; if((err = netfs_validate_stat(node, user))) goto out; if(libfuse_params.deflt_perms) { if (flags & O_READ) err = fshelp_access (&node->nn_stat, S_IREAD, user); if (!err && (flags & O_WRITE)) err = fshelp_access (&node->nn_stat, S_IWRITE, user); if (!err && (flags & O_EXEC)) err = fshelp_access (&node->nn_stat, S_IEXEC, user); } /* store provided flags for later open/read/write/release operation call. * * If O_EXEC is set, make sure O_RDONLY is set, this is, if you want to * execute a binary, only O_EXEC is set, but we want to read the binary * into memory. */ if(! err) { NN_INFO_APPLY(node, flags = flags); if(flags & O_EXEC) NN_INFO_APPLY(node, flags |= O_RDONLY); } out: FUNC_EPILOGUE(err); } /* This should attempt a chmod call for the user specified by CRED on node NODE, to change the mode to MODE. Unlike the normal Unix and Hurd meaning of chmod, this function is also used to attempt to change files into other types. If such a transition is attempted which is impossible, then return EOPNOTSUPP. */ error_t netfs_attempt_chmod (struct iouser *cred, struct node *node, mode_t mode) { FUNC_PROLOGUE_NODE("netfs_attempt_chmod", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_isowner(&node->nn_stat, cred)))) goto out; if(! FUSE_OP_HAVE(chmod)) { err = EOPNOTSUPP; goto out; } err = -FUSE_OP_CALL(chmod, node->nn->path, mode); node->nn->may_need_sync = 1; out: FUNC_EPILOGUE(err); } /* Attempt to create an anonymous file related to DIR for USER with MODE. Set *NODE to the returned file upon success. No matter what, unlock DIR. */ error_t netfs_attempt_mkfile (struct iouser *user, struct node *dir, mode_t mode, struct node **node) { FUNC_PROLOGUE("netfs_attempt_mkfile"); error_t err; char name[20]; static int num = 0; if(! (err = netfs_validate_stat(dir, user)) && libfuse_params.deflt_perms) err = fshelp_checkdirmod(&dir->nn_stat, NULL, user); if(! err && ! FUSE_OP_HAVE(mknod)) err = EOPNOTSUPP; if(err) { /* dir has to be unlocked no matter what ... */ pthread_mutex_unlock (&dir->lock); goto out; } /* call netfs_attempt_create_file with O_EXCL and O_CREAT bits set */ mode |= O_EXCL | O_CREAT; do { snprintf(name, sizeof(name), ".libfuse-%06d", num ++); err = netfs_attempt_create_file(user, dir, name, mode, node); if(err == EEXIST) pthread_mutex_lock(&dir->lock); /* netfs_attempt_create_file just unlocked * it for us, however we need to call it once * more ... */ } while(err == EEXIST); out: if(err) *node = 0; else (*node)->nn->anonymous = 1; /* mark netnode of created file as anonymous, * i.e. mark it as to delete in noref routine */ /* we don't have to mark the netnode as may_need_sync, as * netfs_attempt_create_file has already done that for us */ /* pthread_mutex_unlock (&dir->lock); * netfs_attempt_create_file already unlocked the node for us. */ FUNC_EPILOGUE(err); } /* This should sync the entire remote filesystem. If WAIT is set, return only after sync is completely finished. */ error_t netfs_attempt_syncfs (struct iouser *cred, int wait) { (void) wait; /* there's no such flag in libfuse */ FUNC_PROLOGUE("netfs_attempt_syncfs"); error_t err; if(cred && test_allow_root_or_other(cred)) err = EPERM; else { refresh_context_struct(cred); err = fuse_sync_filesystem(); } FUNC_EPILOGUE(err); } /* This should sync the file NODE completely to disk, for the user CRED. If WAIT is set, return only after sync is completely finished. */ error_t netfs_attempt_sync (struct iouser *cred, struct node *node, int wait) { (void) wait; /* there's no such flag in libfuse */ FUNC_PROLOGUE_NODE("netfs_attempt_sync", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IWRITE, cred)))) goto out; if(! FUSE_OP_HAVE(fsync)) { err = EOPNOTSUPP; goto out; } err = -FUSE_OP_CALL(fsync, node->nn->path, 0, NN_INFO(node)); if(! err) node->nn->may_need_sync = 0; out: FUNC_EPILOGUE(err); } /* Delete NAME in DIR for USER. * The node DIR is locked, and shall stay locked */ error_t netfs_attempt_unlink (struct iouser *user, struct node *dir, char *name) { FUNC_PROLOGUE("netfs_attempt_unlink"); error_t err; struct node *node = NULL; err = netfs_attempt_lookup(user, dir, name, &node); assert(dir != node); pthread_mutex_lock(&dir->lock); /* re-lock directory, since netfs_attempt_lookup * unlocked it for us */ if(err) goto out; pthread_mutex_unlock(&node->lock); if((err = netfs_validate_stat(dir, user)) || (err = netfs_validate_stat(node, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&dir->nn_stat, &node->nn_stat, user)))) goto out; if(FUSE_OP_HAVE(unlink)) err = -FUSE_OP_CALL(unlink, node->nn->path); else err = EOPNOTSUPP; /* TODO free associated netnode. really? * FIXME, make sure nn->may_need_sync is set */ out: if(node) netfs_nrele(node); FUNC_EPILOGUE(err); } /* This should attempt to set the size of the file NODE (for user CRED) to SIZE bytes long. */ error_t netfs_attempt_set_size (struct iouser *cred, struct node *node, loff_t size) { FUNC_PROLOGUE_NODE("netfs_attempt_set_size", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IWRITE, cred)))) goto out; if(FUSE_OP_HAVE(truncate)) err = -FUSE_OP_CALL(truncate, node->nn->path, size); else err = EOPNOTSUPP; out: FUNC_EPILOGUE(err); } /* Attempt to turn NODE (user CRED) into a device. TYPE is either S_IFBLK or S_IFCHR. */ error_t netfs_attempt_mkdev (struct iouser *cred, struct node *node, mode_t type, dev_t indexes) { FUNC_PROLOGUE_NODE("netfs_attempt_mkdev", node); error_t err; /* check permissions * XXX, shall we check permissions of the parent directory as well, * since we're going to unlink files? */ if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IWRITE, cred)))) goto out; /* check whether the operations are available at all */ if(! FUSE_OP_HAVE(mknod)) { err = EOPNOTSUPP; goto out; } /* we need to unlink the existing node, therefore, if unlink is not * available, we cannot turn *node into a device. */ if(! FUSE_OP_HAVE(unlink)) { err = EOPNOTSUPP; goto out; } /* unlink the already existing node, to be able to create the (new) * device file */ if((err = -FUSE_OP_CALL(unlink, node->nn->path))) goto out; err = -FUSE_OP_CALL(mknod, node->nn->path, type & (ALLPERMS | S_IFBLK | S_IFCHR), indexes); node->nn->may_need_sync = 1; out: FUNC_EPILOGUE(err); } /* Return the valid access types (bitwise OR of O_READ, O_WRITE, and O_EXEC) in *TYPES for file NODE and user CRED. */ error_t netfs_report_access (struct iouser *cred, struct node *node, int *types) { FUNC_PROLOGUE_NODE("netfs_report_access", node); error_t err; *types = 0; if((err = netfs_validate_stat(node, cred))) goto out; if(libfuse_params.deflt_perms) { if(fshelp_access (&node->nn_stat, S_IREAD, cred) == 0) *types |= O_READ; if(fshelp_access (&node->nn_stat, S_IWRITE, cred) == 0) *types |= O_WRITE; if(fshelp_access (&node->nn_stat, S_IEXEC, cred) == 0) *types |= O_EXEC; } else /* check_allow_root_or_other allowed to get here, this is, we're * allowed to access the file. Default permissions checking is disabled, * thus, grant access */ *types |= O_READ | O_WRITE | O_EXEC; out: FUNC_EPILOGUE(0); } /* Lookup NAME in DIR for USER; set *NODE to the found name upon return. If the name was not found, then return ENOENT. On any error, clear *NODE. (*NODE, if found, should be locked, this call should unlock DIR no matter what.) */ error_t netfs_attempt_lookup (struct iouser *user, struct node *dir, char *name, struct node **node) { FUNC_PROLOGUE_FMT("netfs_attempt_lookup", "name=%s, dir=%s", name, dir->nn->path); error_t err; if((err = netfs_validate_stat(dir, user)) || (libfuse_params.deflt_perms && ((err = fshelp_access(&dir->nn_stat, S_IREAD, user)) || (err = fshelp_access(&dir->nn_stat, S_IEXEC, user))))) goto out; else err = ENOENT; /* default to return ENOENT */ if(! strcmp(name, ".")) { /* lookup for current directory, return another refernce to it */ netfs_nref(dir); *node = dir; err = 0; /* it's alright ... */ } else if(! strcmp(name, "..")) { if(dir->nn->parent) { /* okay, there is a parent directory, return a reference to that */ *node = fuse_make_node(dir->nn->parent); err = 0; } else /* cannot go up from top directory */ err = EAGAIN; } else if(FUSE_OP_HAVE(getattr)) { /* lookup for common file */ struct netnode *nn; char *path; struct stat stbuf; if(asprintf(&path, "%s/%s", dir->nn->parent ? dir->nn->path : "", name) < 0) { err = ENOMEM; goto out; } if(! (err = -FUSE_OP_CALL(getattr, path, &stbuf))) if(! (nn = fuse_make_netnode(dir->nn, path)) || ! (*node = fuse_make_node(nn))) err = ENOMEM; free(path); /* fuse_make_netnode strdup()s the pathname */ } out: pthread_mutex_unlock(&dir->lock); if(err) *node = NULL; else pthread_mutex_lock(&(*node)->lock); FUNC_EPILOGUE(err); } /* Create a link in DIR with name NAME to FILE for USER. Note that neither DIR nor FILE are locked. If EXCL is set, do not delete the target, but return EEXIST if NAME is already found in DIR. */ error_t netfs_attempt_link (struct iouser *user, struct node *dir, struct node *file, char *name, int excl) { FUNC_PROLOGUE_FMT("netfs_attempt_link", "link=%s/%s, to=%s", dir->nn->path, name, file->nn->path); error_t err; struct node *node = NULL; pthread_mutex_lock(&dir->lock); if((err = netfs_attempt_lookup(user, dir, name, &node))) goto out_nounlock; /* netfs_attempt_lookup unlocked dir */ assert(dir != node); pthread_mutex_lock(&dir->lock); if((err = netfs_validate_stat(node, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&dir->nn_stat, &node->nn_stat, user)))) goto out; if(! FUSE_OP_HAVE(link)) { err = EOPNOTSUPP; goto out; } if(! excl && FUSE_OP_HAVE(unlink)) /* EXCL is not set, therefore we may remove the target, i.e. call * unlink on it. Ignoring return value, as it's mostly not interesting, * since the file does not exist in most case */ (void) FUSE_OP_CALL(unlink, node->nn->path); err = -FUSE_OP_CALL(link, file->nn->path, node->nn->path); /* TODO * create a netnode with the may_need_sync flag set!! */ out: pthread_mutex_unlock(&dir->lock); pthread_mutex_unlock(&node->lock); netfs_nrele(node); out_nounlock: FUNC_EPILOGUE(err); } /* Attempt to remove directory named NAME in DIR for USER. * directory DIR is locked, and shall stay locked. */ error_t netfs_attempt_rmdir (struct iouser *user, struct node *dir, char *name) { FUNC_PROLOGUE("netfs_attempt_rmdir"); error_t err; struct node *node = NULL; err = netfs_attempt_lookup(user, dir, name, &node); assert(dir != node); pthread_mutex_lock(&dir->lock); /* netfs_attempt_lookup unlocked dir */ if(err) goto out_nounlock; if((err = netfs_validate_stat(node, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&dir->nn_stat, &node->nn_stat, user)))) goto out; if(FUSE_OP_HAVE(rmdir)) err = -FUSE_OP_CALL(rmdir, node->nn->path); else err = EOPNOTSUPP; /* TODO free associated netnode. really? * FIXME, make sure nn->may_need_sync is set */ out: pthread_mutex_unlock(&node->lock); netfs_nrele(node); out_nounlock: FUNC_EPILOGUE(err); } /* This should attempt a chauthor call for the user specified by CRED on node NODE, to change the author to AUTHOR. */ error_t netfs_attempt_chauthor (struct iouser *cred, struct node *node, uid_t author) { (void) cred; (void) author; FUNC_PROLOGUE_NODE("netfs_attempt_chauthor", node); NOT_IMPLEMENTED(); FUNC_EPILOGUE(EROFS); } /* Attempt to turn NODE (user CRED) into a symlink with target NAME. */ error_t netfs_attempt_mksymlink (struct iouser *cred, struct node *node, char *name) { FUNC_PROLOGUE_NODE("netfs_attempt_mksymlink", node); error_t err; /* check permissions * XXX, shall we check permissions of the parent directory as well, * since we're going to unlink files? */ if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IWRITE, cred)))) goto out; /* we need to unlink the existing node, therefore, if unlink is not * available, we cannot create symlinks */ if(! FUSE_OP_HAVE(unlink)) { err = EOPNOTSUPP; goto out; } /* symlink function available? if not, fail. */ if(! FUSE_OP_HAVE(symlink)) { err = EOPNOTSUPP; goto out; } /* try to remove the existing node (probably an anonymous file) */ if((err = -FUSE_OP_CALL(unlink, node->nn->path))) goto out; err = -FUSE_OP_CALL(symlink, name, node->nn->path); /* we don't have to adjust nodes/netnodes, as these are already existing. * netfs_attempt_mkfile did that for us. */ if(! err) node->nn->may_need_sync = 1; out: FUNC_EPILOGUE(err); } /* Note that in this one call, neither of the specific nodes are locked. */ error_t netfs_attempt_rename (struct iouser *user, struct node *fromdir, char *fromname, struct node *todir, char *toname, int excl) { FUNC_PROLOGUE("netfs_attempt_rename"); error_t err; struct node *fromnode; char *topath = NULL; if(! (topath = malloc(strlen(toname) + strlen(todir->nn->path) + 2))) { err = ENOMEM; goto out_nounlock; } pthread_mutex_lock(&fromdir->lock); if(netfs_attempt_lookup(user, fromdir, fromname, &fromnode)) { err = ENOENT; goto out_nounlock; /* netfs_attempt_lookup unlocked fromdir and locked * fromnode for us. */ } pthread_mutex_lock(&todir->lock); if((err = netfs_validate_stat(fromdir, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&fromdir->nn_stat, &fromnode->nn_stat, user)))) goto out; if((err = netfs_validate_stat(todir, user)) || (libfuse_params.deflt_perms && (err = fshelp_checkdirmod(&todir->nn_stat, NULL, user)))) goto out; if(! FUSE_OP_HAVE(rename)) { err = EOPNOTSUPP; goto out; } sprintf(topath, "%s/%s", todir->nn->path, toname); if(! excl && FUSE_OP_HAVE(unlink)) /* EXCL is not set, therefore we may remove the target, i.e. call * unlink on it. Ignoring return value, as it's mostly not interesting, * since the file does not exist in most cases */ (void) FUSE_OP_CALL(unlink, topath); err = -FUSE_OP_CALL(rename, fromnode->nn->path, topath); if(! err) { struct netnode *nn; if(! (nn = fuse_make_netnode(todir->nn, topath))) goto out; nn->may_need_sync = 1; /* FIXME mark fromnode to destroy it's associated netnode */ } out: free(topath); pthread_mutex_unlock(&todir->lock); pthread_mutex_unlock(&fromnode->lock); netfs_nrele(fromnode); out_nounlock: FUNC_EPILOGUE(err); } /* Write to the file NODE for user CRED starting at OFSET and continuing for up to *LEN bytes from DATA. Set *LEN to the amount seccessfully written upon return. */ error_t netfs_attempt_write (struct iouser *cred, struct node *node, loff_t offset, size_t *len, void *data) { FUNC_PROLOGUE_NODE("netfs_attempt_write", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IWRITE, cred)))) goto out; if(! FUSE_OP_HAVE(write)) { err = EOPNOTSUPP; goto out; } NN_INFO_APPLY(node, writepage = 0); /* cannot distinct on the Hurd :( */ if(FUSE_OP_HAVE(open)) { err = -FUSE_OP_CALL(open, node->nn->path, NN_INFO(node)); if(err) goto out; } int sz = FUSE_OP_CALL(write, node->nn->path, data, *len, offset, NN_INFO(node)); /* FIXME: open, flush and release handling probably should be changed * completely, I mean, we probably should do fuse_ops->open in * the netfs_check_open_permissions function and leave it open * until the node is destroyed. * * This way we wouldn't be able to report any errors back. */ if(sz >= 0 && FUSE_OP_HAVE(flush)) err = -FUSE_OP_CALL(flush, node->nn->path, NN_INFO(node)); if(FUSE_OP_HAVE(open) && FUSE_OP_HAVE(release)) FUSE_OP_CALL(release, node->nn->path, NN_INFO(node)); if(sz < 0) err = -sz; else *len = sz; out: FUNC_EPILOGUE(err); } /* This should attempt a utimes call for the user specified by CRED on node NODE, to change the atime to ATIME and the mtime to MTIME. */ error_t netfs_attempt_utimes (struct iouser *cred, struct node *node, struct timespec *atime, struct timespec *mtime) { FUNC_PROLOGUE_NODE("netfs_attempt_utimes", node); error_t err; /* test whether operation is supported and permission are sufficient */ if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_isowner(&node->nn_stat, cred)))) goto out; if(FUSE_OP_HAVE(utimens)) { /* Prepare TS for FUSE_OP_HAVE(utimens) call. */ struct timespec ts[2]; ts[0] = atime ? *atime : node->nn_stat.st_atim; ts[1] = mtime ? *mtime : node->nn_stat.st_mtim; err = -FUSE_OP_CALL(utimens, node->nn->path, ts); if (!err) { node->nn_stat.st_mtim = ts[1]; node->nn_stat.st_atim = ts[0]; node->nn->may_need_sync = 1; } } else if(FUSE_OP_HAVE(utime)) { /* Prepare UTB for FUSE_OP_HAVE(utime) call. */ struct utimbuf utb; utb.actime = atime ? atime->tv_sec : node->nn_stat.st_atime; utb.modtime = mtime ? mtime->tv_sec : node->nn_stat.st_mtime; err = -FUSE_OP_CALL(utime, node->nn->path, &utb); if (!err) { node->nn_stat.st_mtim.tv_sec = utb.modtime; node->nn_stat.st_mtim.tv_nsec = 0; node->nn_stat.st_atim.tv_sec = utb.actime; node->nn_stat.st_atim.tv_nsec = 0; node->nn->may_need_sync = 1; } } else err = EOPNOTSUPP; out: FUNC_EPILOGUE(err); } /* Read from the file NODE for user CRED starting at OFFSET and continuing for up to *LEN bytes. Put the data at DATA. Set *LEN to the amount successfully read upon return. */ error_t netfs_attempt_read (struct iouser *cred, struct node *node, loff_t offset, size_t *len, void *data) { FUNC_PROLOGUE_NODE("netfs_attempt_read", node); error_t err; if((err = netfs_validate_stat(node, cred)) || (libfuse_params.deflt_perms && (err = fshelp_access(&node->nn_stat, S_IREAD, cred)))) goto out; if(! FUSE_OP_HAVE(read)) { err = EOPNOTSUPP; goto out; } if(FUSE_OP_HAVE(open)) { err = -FUSE_OP_CALL(open, node->nn->path, NN_INFO(node)); if(err) goto out; } int sz = FUSE_OP_CALL(read, node->nn->path, data, *len, offset, NN_INFO(node)); /* FIXME: open, flush and release handling probably should be changed * completely, I mean, we probably should do fuse_ops->open in * the netfs_check_open_permissions function and leave it open * until the node is destroyed. * * This way we wouldn't be able to report any errors back. */ if(sz >= 0 && FUSE_OP_HAVE(flush)) err = -FUSE_OP_CALL(flush, node->nn->path, NN_INFO(node)); if(FUSE_OP_HAVE(open) && FUSE_OP_HAVE(release)) FUSE_OP_CALL(release, node->nn->path, NN_INFO(node)); if(sz < 0) err = -sz; else { err = 0; *len = sz; } out: FUNC_EPILOGUE(err); } /* Returned directory entries are aligned to blocks this many bytes long. Must be a power of two. */ #define DIRENT_ALIGN 4 #define DIRENT_NAME_OFFS offsetof (struct dirent, d_name) /* Length is structure before the name + the name + '\0', all padded to a four-byte alignment. */ #define DIRENT_LEN(name_len) \ ((DIRENT_NAME_OFFS + (name_len) + 1 + (DIRENT_ALIGN - 1)) \ & ~(DIRENT_ALIGN - 1)) /* fuse_get_inode * * look up the inode of the named file (full path) in fuse_use_ino mode, * where we don't have the inode number of parent directories in our structs */ static ino_t fuse_get_inode(const char *name) { struct stat stat; assert(FUSE_OP_HAVE(getattr)); FUSE_OP_CALL(getattr, name, &stat); return stat.st_ino; } /* callback handler used by netfs_get_dirents to write our dirents * to the mmaped memory (getdir case) */ static int get_dirents_getdir_helper(fuse_dirh_t handle, const char *name, int type, ino_t ino) { ino_t inode; if(handle->first_entry) { /* skip this entry, it's before the first one we got to write out ... */ handle->first_entry --; return 0; } if(! (handle->num_entries --)) return ENOMEM; size_t name_len = strlen(name); size_t dirent_len = DIRENT_LEN(name_len); if(dirent_len > handle->size) { handle->num_entries = 0; /* don't write any further data, e.g. in case */ return ENOMEM; /* next filename's shorter */ } else handle->size -= dirent_len; /* look the inode of this element up ... */ if(libfuse_params.use_ino) { /* using the inode based api */ if(! strcmp(name, ".")) inode = fuse_get_inode(handle->parent->path); else if(handle->parent->parent && ! strcmp(name, "..")) inode = fuse_get_inode(handle->parent->parent->path); else inode = ino; } else { /* using the old (lookup) method ... */ if(! strcmp(name, ".")) inode = handle->parent->inode; else if(handle->parent->parent && ! strcmp(name, "..")) inode = handle->parent->parent->inode; else { if(name_len > handle->maxlen) { /* allocated field in handle structure is to small, enlarge it */ handle->maxlen = name_len << 1; void *a = realloc(handle->abspath, handle->maxlen + (handle->filename - handle->abspath) + 1); if(! a) return ENOMEM; handle->filename = a + (handle->filename - handle->abspath); handle->abspath = a; } strcpy(handle->filename, name); struct netnode *nn = fuse_make_netnode(handle->parent, handle->abspath); if(! nn) return ENOMEM; inode = nn->inode; } } /* write out struct dirent ... */ handle->hdrpos->d_fileno = inode; handle->hdrpos->d_reclen = dirent_len; handle->hdrpos->d_type = type; handle->hdrpos->d_namlen = name_len; /* copy file's name ... */ memcpy(((void *) handle->hdrpos) + DIRENT_NAME_OFFS, name, name_len + 1); /* update hdrpos pointer */ handle->hdrpos = ((void *) handle->hdrpos) + dirent_len; handle->count ++; return 0; } static error_t get_dirents_getdir(struct node *dir, int first_entry, int num_entries, char **data, mach_msg_type_number_t *data_len, int *data_entries) { FUNC_PROLOGUE_NODE("get_dirents_getdir", dir); if(! FUSE_OP_HAVE(getdir)) FUNC_RETURN(EOPNOTSUPP); fuse_dirh_t handle; if(! (handle = malloc(sizeof(struct fuse_dirhandle)))) FUNC_RETURN(ENOMEM); handle->first_entry = first_entry; handle->num_entries = num_entries; handle->count = 0; handle->size = *data_len; /* allocate handle->abspath */ size_t path_len = strlen(dir->nn->path); if(! (handle->abspath = malloc((handle->maxlen = 256) + path_len + 2))) { free(handle); FUNC_RETURN(ENOMEM); } memcpy(handle->abspath, dir->nn->path, path_len); handle->filename = handle->abspath + path_len; /* add a delimiting slash if there are parent directories */ if(dir->nn->parent) *(handle->filename ++) = '/'; handle->parent = dir->nn; handle->hdrpos = (struct dirent*) *data; FUSE_OP_CALL(getdir, dir->nn->path, handle, get_dirents_getdir_helper); *data_len -= handle->size; /* subtract number of bytes left in the * buffer from the length of the buffer we * got. */ *data_entries = handle->count; free(handle->abspath); free(handle); FUNC_EPILOGUE(0); } /* callback handler used by netfs_get_dirents to write our dirents * to the mmaped memory (in readdir case) * * be careful, according to fuse.h `stat' may be NULL! */ static int get_dirents_readdir_helper(void *buf, const char *name, const struct stat *stat, off_t off) { fuse_dirh_t handle = buf; ino_t inode; if(handle->first_entry && !off) { /* skip this entry, it's before the first one * we got to write out ... */ handle->first_entry --; return 0; } if(! (handle->num_entries --)) return 1; size_t name_len = strlen(name); size_t dirent_len = DIRENT_LEN(name_len); if(dirent_len > handle->size) { handle->num_entries = 0; /* don't write any further data, e.g. in case */ return ENOMEM; /* next filename's shorter */ } else handle->size -= dirent_len; /* look the inode of this element up ... */ if(libfuse_params.use_ino) { /* using the inode based api */ if(! strcmp(name, ".")) inode = fuse_get_inode(handle->parent->path); else if(handle->parent->parent && ! strcmp(name, "..")) inode = fuse_get_inode(handle->parent->parent->path); if(! stat) { DEBUG("critical", "use_ino flag set, but stat ptr not available.\n"); inode = 0; } else inode = stat->st_ino; } else { /* using the old (lookup) method ... */ if(! strcmp(name, ".")) inode = handle->parent->inode; else if(handle->parent->parent && ! strcmp(name, "..")) inode = handle->parent->parent->inode; else { if(name_len > handle->maxlen) { /* allocated field in handle structure is to small, enlarge it */ handle->maxlen = name_len << 1; void *a = realloc(handle->abspath, handle->maxlen + (handle->filename - handle->abspath) + 1); if(! a) return ENOMEM; handle->filename = a + (handle->filename - handle->abspath); handle->abspath = a; } strcpy(handle->filename, name); struct netnode *nn = fuse_make_netnode(handle->parent, handle->abspath); if(! nn) return ENOMEM; inode = nn->inode; } } /* write out struct dirent ... */ handle->hdrpos->d_fileno = inode; handle->hdrpos->d_reclen = dirent_len; handle->hdrpos->d_type = stat ? (stat->st_mode >> 12) : 0; handle->hdrpos->d_namlen = name_len; /* copy file's name ... */ memcpy(((void *) handle->hdrpos) + DIRENT_NAME_OFFS, name, name_len + 1); /* update hdrpos pointer */ handle->hdrpos = ((void *) handle->hdrpos) + dirent_len; handle->count ++; return 0; } static error_t get_dirents_readdir(struct node *dir, int first_entry, int num_entries, char **data, mach_msg_type_number_t *data_len, int *data_entries) { error_t err; FUNC_PROLOGUE_NODE("get_dirents_readdir", dir); assert(FUSE_OP_HAVE(readdir)); fuse_dirh_t handle; if(! (handle = malloc(sizeof(struct fuse_dirhandle)))) FUNC_RETURN(ENOMEM); handle->first_entry = first_entry; handle->num_entries = num_entries; handle->count = 0; handle->size = *data_len; /* allocate handle->abspath */ size_t path_len = strlen(dir->nn->path); if(! (handle->abspath = malloc((handle->maxlen = 256) + path_len + 2))) { err = ENOMEM; goto out; } memcpy(handle->abspath, dir->nn->path, path_len); handle->filename = handle->abspath + path_len; /* add a delimiting slash if there are parent directories */ if(dir->nn->parent) *(handle->filename ++) = '/'; handle->parent = dir->nn; handle->hdrpos = (struct dirent*) *data; if(FUSE_OP_HAVE(opendir) && (err = -FUSE_OP_CALL(opendir, dir->nn->path, NN_INFO(dir)))) goto out; if((err = -FUSE_OP_CALL(readdir, dir->nn->path, handle, get_dirents_readdir_helper, first_entry, NN_INFO(dir)))) { if(FUSE_OP_HAVE(releasedir)) FUSE_OP_CALL(releasedir, dir->nn->path, NN_INFO(dir)); goto out; } if(FUSE_OP_HAVE(releasedir) && (err = -FUSE_OP_CALL(releasedir, dir->nn->path, NN_INFO(dir)))) goto out; *data_len -= handle->size; /* subtract number of bytes left in the * buffer from the length of the buffer we * got. */ *data_entries = handle->count; out: free(handle->abspath); free(handle); FUNC_EPILOGUE(err); } error_t netfs_get_dirents (struct iouser *cred, struct node *dir, int first_entry, int num_entries, char **data, mach_msg_type_number_t *data_len, vm_size_t max_data_len, int *data_entries) { (void) max_data_len; /* we live with the supplied mmap area in any case, * i.e. never allocate any further memory */ FUNC_PROLOGUE_NODE("netfs_get_dirents", dir); error_t err; if((err = netfs_validate_stat(dir, cred)) || (libfuse_params.deflt_perms && ((err = fshelp_access(&dir->nn_stat, S_IREAD, cred)) || (err = fshelp_access(&dir->nn_stat, S_IEXEC, cred))))) goto out; if(FUSE_OP_HAVE(readdir)) err = get_dirents_readdir(dir, first_entry, num_entries, data, data_len, data_entries); else if(FUSE_OP_HAVE(getdir)) err = get_dirents_getdir(dir, first_entry, num_entries, data, data_len, data_entries); else err = EOPNOTSUPP; /* TODO: fshelp_touch ATIME here */ out: FUNC_EPILOGUE_FMT(err, "%d entries.", *data_entries); } /* Node NP is all done; free all its associated storage. */ void netfs_node_norefs (struct node *node) { FUNC_PROLOGUE_NODE("netfs_node_norefs", node); assert(node); DEBUG("netnode-lock", "locking netnode, path=%s\n", node->nn->path); pthread_mutex_lock(&node->nn->lock); if(node->nn->anonymous && FUSE_OP_HAVE(unlink)) { /* FIXME, need to lock parent directory structure */ FUSE_OP_CALL(unlink, node->nn->path); /* FIXME, free associated netnode somehow. */ } node->nn->node = NULL; pthread_mutex_unlock(&node->nn->lock); DEBUG("netnode-lock", "netnode unlocked.\n"); /* no ref to node->nn av. */ FUNC_EPILOGUE_NORET(); } libfuse-0.0.20140820/src/netnode.c000066400000000000000000000076101212557316700163050ustar00rootroot00000000000000/********************************************************** * netnode.c * * Copyright(C) 2004,2005,2006 by Stefan Siegl , Germany * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU General Publice License, * version 2 or any later. The license is contained in the COPYING * file that comes with the libfuse distribution. * * netnode handling */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #include "fuse_i.h" #include "fuse.h" #define HASH_BUCKETS 512 struct hash_element; static struct hash_element { struct netnode *nn; struct hash_element *next; /* singly linked list */ } fuse_netnodes[HASH_BUCKETS] = {{ 0 }}; /* rwlock needs to be held when touching either fuse_netnodes hash or * fuse_next_inode variable */ pthread_rwlock_t fuse_netnodes_lock = PTHREAD_RWLOCK_INITIALIZER; /* next inode number that will be assigned * (fuse_netnodes_lock must be write locked, when touching this) */ ino_t fuse_next_inode = 1; static unsigned int fuse_netnode_hash_value(const char *path) { unsigned int hash = 0, a = 23, b = 251; while(*path) { hash = hash * a + *(path ++); a *= b; } return hash % HASH_BUCKETS; } struct netnode * fuse_make_netnode(struct netnode *parent, const char *path) { struct hash_element *hash_el; struct netnode *nn; unsigned int hash_value = fuse_netnode_hash_value(path); DEBUG("make_netnode", "hash for '%s' is %u\n", path, hash_value); DEBUG("netnodes_lock", "aquiring pthread_rwlock_rdlock for %s.\n", path); pthread_rwlock_rdlock(&fuse_netnodes_lock); hash_el = &fuse_netnodes[hash_value]; if(hash_el->nn) do if(! strcmp(hash_el->nn->path, path)) { nn = hash_el->nn; pthread_rwlock_unlock(&fuse_netnodes_lock); DEBUG("netnodes_lock", "releasing pthread_rwlock_rdlock.\n"); return nn; } while((hash_el = hash_el->next)); pthread_rwlock_unlock(&fuse_netnodes_lock); DEBUG("netnodes_lock", "releasing pthread_rwlock_rdlock.\n"); nn = calloc(1, sizeof(*nn)); if(! nn) return NULL; /* unfortunately we cannot serve a netnode .... */ nn->path = strdup(path); nn->parent = parent; pthread_mutex_init(&nn->lock, NULL); DEBUG("netnodes_lock", "aquiring pthread_rwlock_wrlock for %s.\n", path); pthread_rwlock_wrlock(&fuse_netnodes_lock); nn->inode = fuse_next_inode ++; /* unable to find hash element, need to generate a new one */ if(! hash_el) hash_el = &fuse_netnodes[hash_value]; if(hash_el->nn) { struct hash_element *new = malloc(sizeof(*new)); if(! new) { pthread_rwlock_unlock(&fuse_netnodes_lock); DEBUG("netnodes_lock", "releasing pthread_rwlock_wrlock.\n"); free(nn); return NULL; /* can't help, sorry. */ } /* enqueue new hash_element */ new->next = hash_el->next; hash_el->next = new; hash_el = new; } hash_el->nn = nn; pthread_rwlock_unlock(&fuse_netnodes_lock); DEBUG("netnodes_lock", "releasing pthread_rwlock_wrlock.\n"); return nn; } /* scan the whole netnode hash and call fuse_ops->fsync on every node, * that may be out of sync */ error_t fuse_sync_filesystem(void) { int i; error_t err = 0; if(! FUSE_OP_HAVE(fsync)) return err; /* success */ /* make sure, nobody tries to confuse us */ pthread_rwlock_wrlock(&fuse_netnodes_lock); for(i = 0; i < HASH_BUCKETS; i ++) { struct hash_element *he = &fuse_netnodes[i]; if(he->nn) do { if(he->nn->may_need_sync) { err = -FUSE_OP_CALL(fsync, he->nn->path, 0, NN_INFO(he)); if(err) goto out; else he->nn->may_need_sync = 0; } if(he->nn->node) DEBUG("netnode-scan", "netnode=%s has attached node\n", he->nn->path); } while((he = he->next)); } out: pthread_rwlock_unlock(&fuse_netnodes_lock); return err; } libfuse-0.0.20140820/src/node.c000066400000000000000000000037161212557316700156010ustar00rootroot00000000000000/********************************************************** * node.c * * Copyright(C) 2004, 2005 by Stefan Siegl , Germany * * This is free software; you can redistribute it and/or * modify it under the terms of the GNU General Publice License, * version 2 or any later. The license is contained in the COPYING * file that comes with the libfuse distribution. * * create (and care for) nodes ... */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include #include #include "fuse_i.h" #include "fuse.h" /* create a new node for the specified netnode */ struct node * fuse_make_node(struct netnode *nn) { struct node *node; DEBUG("fuse_make_node", "creating node for %s.\n", nn->path); DEBUG("netnode-lock", "locking netnode, path=%s\n", nn->path); pthread_mutex_lock(&nn->lock); if((node = nn->node)) { /* there already is a node, therefore return another reference to it */ netfs_nref(node); pthread_mutex_unlock(&nn->lock); DEBUG("netnode-lock", "UNlocking netnode, path=%s\n", nn->path); DEBUG("fuse_make_node", "reusing already existing node, %s\n", nn->path); return node; } if(! (node = netfs_make_node(nn))) { pthread_mutex_unlock(&nn->lock); DEBUG("netnode-lock", "UNlocking netnode, path=%s\n", nn->path); return NULL; /* doesn't look to good for us :-( */ } /* now initialize those stats for which we are reliable ... */ node->nn_stat.st_ino = nn->inode; node->nn_stat.st_blksize = 4096; /* depends on our host program, but since * we're expected to fill, assume 4k for now */ node->nn_stat.st_rdev = 0; /* add pointer to our new node structure to the netnode */ nn->node = node; pthread_mutex_unlock(&nn->lock); DEBUG("netnode-lock", "UNlocking netnode, path=%s\n", nn->path); DEBUG("fuse_make_node", "created a new node for %s.\n", nn->path); return node; }