pax_global_header00006660000000000000000000000064126170245700014516gustar00rootroot0000000000000052 comment=04185a29152c133d4d01fcd1cbe6bc48cb08d6c8 pygtail-0.6.1/000077500000000000000000000000001261702457000131735ustar00rootroot00000000000000pygtail-0.6.1/.gitignore000066400000000000000000000000531261702457000151610ustar00rootroot00000000000000*.pyc *.egg-info .coverage build dist .tox pygtail-0.6.1/.travis.yml000066400000000000000000000003541261702457000153060ustar00rootroot00000000000000language: python python: - 2.6 - 2.7 - pypy # - 3.1 # no longer supported on travis - 3.2 - 3.3 script: python setup.py test install: - if [[ $TRAVIS_PYTHON_VERSION == 2.6 ]]; then pip install --use-mirrors unittest2; fi pygtail-0.6.1/LICENSE000066400000000000000000000432531261702457000142070ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 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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 Lesser General Public License instead of this License.pygtail-0.6.1/README.md000066400000000000000000000025171261702457000144570ustar00rootroot00000000000000pygtail ======= A python "port" of [logcheck's logtail2](http://logcheck.org). Pygtail reads log file lines that have not been read. It will even handle log files that have been rotated. Usage ----- From the command line: Usage: pygtail.py [options] logfile Print log file lines that have not been read. Options: -h, --help show this help message and exit -o OFFSET_FILE, --offset-file=OFFSET_FILE File to which offset data is written (default: .offset). -p, --paranoid Update the offset file every time we read a line (as opposed to only when we reach the end of the file). -n N, --every-n=N Update the offset file every N'th time we read a line (as opposed to only when we reach the end of the file). --no-copytruncate Don't support copytruncate-style log rotation. Instead, if the log file shrinks, print a warning. In your code: ```python from pygtail import Pygtail for line in Pygtail("some.log"): sys.stdout.write(line) ``` Build status ------------ [![Build Status](https://secure.travis-ci.org/bgreenlee/pygtail.png)](http://travis-ci.org/bgreenlee/pygtail) pygtail-0.6.1/README.txt000066400000000000000000000026051261702457000146740ustar00rootroot00000000000000pygtail ======= A python "port" of `logcheck's logtail2 `__. Pygtail reads log file lines that have not been read. It will even handle log files that have been rotated. Usage ----- From the command line: :: Usage: pygtail.py [options] logfile Print log file lines that have not been read. Options: -h, --help show this help message and exit -o OFFSET_FILE, --offset-file=OFFSET_FILE File to which offset data is written (default: .offset). -p, --paranoid Update the offset file every time we read a line (as opposed to only when we reach the end of the file). -n N, --every-n=N Update the offset file every N'th time we read a line (as opposed to only when we reach the end of the file). --no-copytruncate Don't support copytruncate-style log rotation. Instead, if the log file shrinks, print a warning. In your code: .. code:: python from pygtail import Pygtail for line in Pygtail("some.log"): sys.stdout.write(line) Build status ------------ |Build Status| .. |Build Status| image:: https://secure.travis-ci.org/bgreenlee/pygtail.png :target: http://travis-ci.org/bgreenlee/pygtail pygtail-0.6.1/debian/000077500000000000000000000000001261702457000144155ustar00rootroot00000000000000pygtail-0.6.1/debian/changelog000066400000000000000000000042161261702457000162720ustar00rootroot00000000000000pygtail (0.6.1) lucid; urgency=low * Enable line buffering to avoid reading incomplete lines (thanks @olystretch) -- Brad Greenlee Thu, 05 November 2015 20:13:52 -0800 pygtail (0.6.0) lucid; urgency=low * Added flag to write offset file only after every n lines, and ability to optionally call a function whenever the offset file is written (thanks @btilly) -- Brad Greenlee Thu, 08 October 2015 05:19:19 -0700 pygtail (0.5.3) lucid; urgency=low * Fixed Python 3 compatibility (thanks @sbraz) -- Brad Greenlee Thu, 16 April 2015 17:30:43 -0700 pygtail (0.5.2) lucid; urgency=medium * Fixed issue with potentially incorrect offset due to python's read-ahead buffer (thanks @czchen) -- Brad Greenlee Thu, 26 March 2015 09:10:36 -0400 pygtail (0.5.1) lucid; urgency=low * Fixed print statement to be Python 3 compatible (thanks @benburry) -- Brad Greenlee Fri, 4 January 2015 20:36:00 -0800 pygtail (0.5.0) lucid; urgency=low * Add handling of rotated and immediately compressed files (thanks @NotSqrt) -- Brad Greenlee Fri, 17 October 2014 09:39:00 -0700 pygtail (0.4.0) lucid; urgency=low * Make support for copytruncate log rotation the default. * Add --no-copytruncate commandline switch. * Print warning if copytruncate is disabled and the log file shrinks -- Brad Greenlee Fri, 9 May 2014 17:31:00 -0700 pygtail (0.3.0) lucid; urgency=low * Add support for copytruncate style logrotation (contributed by https://github.com/atward) -- Brad Greenlee Fri, 9 May 2014 16:00:00 -0700 pygtail (0.2.2) lucid; urgency=low * Add parsing support for python's TimedRotatingFileHandler (contributed by https://github.com/darknight) -- Brad Greenlee Wed, 21 Aug 2013 15:50:00 -0700 pygtail (0.2.1) lucid; urgency=low * Add ReStructuredText README for PyPi. -- Brad Greenlee Wed, 06 Jul 2011 12:37:08 -0700 pygtail (0.2) lucid; urgency=low * Add setup.py and debianize. -- Brad Greenlee Wed, 05 Jul 2011 15:04:42 -0700 pygtail-0.6.1/debian/compat000066400000000000000000000000021261702457000156130ustar00rootroot000000000000007 pygtail-0.6.1/debian/control000066400000000000000000000006101261702457000160150ustar00rootroot00000000000000Source: pygtail Section: python Priority: optional Maintainer: Brad Greenlee Build-Depends: debhelper (>= 7) Build-Depends-Indep: python-support, python-setuptools Standards-Version: 3.8.3 Homepage: http://github.com/bgreenlee/pygtail Package: pygtail Architecture: all Depends: ${misc:Depends}, ${python:Depends} Description: Reads log file lines that have not been read. pygtail-0.6.1/debian/copyright000066400000000000000000000001521261702457000163460ustar00rootroot00000000000000Copyright: 2011 Brad Greenlee License: GPL v2 http://www.gnu.org/licenses/gpl-2.0.html pygtail-0.6.1/debian/rules000077500000000000000000000000411261702457000154700ustar00rootroot00000000000000#!/usr/bin/make -f %: dh $@ pygtail-0.6.1/makedoc.sh000077500000000000000000000000771261702457000151410ustar00rootroot00000000000000#!/bin/bash pandoc -f markdown -t rst -o README.txt README.md pygtail-0.6.1/pygtail/000077500000000000000000000000001261702457000146445ustar00rootroot00000000000000pygtail-0.6.1/pygtail/__init__.py000066400000000000000000000001061261702457000167520ustar00rootroot00000000000000from pygtail.core import __version__ from pygtail.core import Pygtail pygtail-0.6.1/pygtail/core.py000077500000000000000000000244521261702457000161600ustar00rootroot00000000000000#!/usr/bin/python -tt # -*- coding: utf-8 -*- # pygtail - a python "port" of logtail2 # Copyright (C) 2011 Brad Greenlee # # Derived from logcheck # Copyright (C) 2003 Jonathan Middleton # Copyright (C) 2001 Paul Slootman # # 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 from __future__ import print_function from os import stat from os.path import exists, getsize import sys import glob import gzip from optparse import OptionParser __version__ = '0.6.1' PY3 = sys.version_info[0] == 3 if PY3: text_type = str else: text_type = unicode def force_text(s, encoding='utf-8', errors='strict'): if isinstance(s, text_type): return s return s.decode(encoding, errors) class Pygtail(object): """ Creates an iterable object that returns only unread lines. Keyword arguments: offset_file File to which offset data is written (default: .offset). paranoid Update the offset file every time we read a line (as opposed to only when we reach the end of the file (default: False)) every_n Update the offset file every n'th line (as opposed to only when we reach the end of the file (default: 0)) on_update Execute this function when offset data is written (default False) copytruncate Support copytruncate-style log rotation (default: True) """ def __init__(self, filename, offset_file=None, paranoid=False, copytruncate=True, every_n=0, on_update=False): self.filename = filename self.paranoid = paranoid self.every_n = every_n self.on_update = on_update self.copytruncate = copytruncate self._offset_file = offset_file or "%s.offset" % self.filename self._offset_file_inode = 0 self._offset = 0 self._since_update = 0 self._fh = None self._rotated_logfile = None # if offset file exists and non-empty, open and parse it if exists(self._offset_file) and getsize(self._offset_file): offset_fh = open(self._offset_file, "r") (self._offset_file_inode, self._offset) = \ [int(line.strip()) for line in offset_fh] offset_fh.close() if self._offset_file_inode != stat(self.filename).st_ino or \ stat(self.filename).st_size < self._offset: # The inode has changed or filesize has reduced so the file # might have been rotated. # Look for the rotated file and process that if we find it. self._rotated_logfile = self._determine_rotated_logfile() def __del__(self): if self._filehandle(): self._filehandle().close() def __iter__(self): return self def next(self): """ Return the next line in the file, updating the offset. """ try: line = self._get_next_line() except StopIteration: # we've reached the end of the file; if we're processing the # rotated log file, we can continue with the actual file; otherwise # update the offset file if self._rotated_logfile: self._rotated_logfile = None self._fh.close() self._offset = 0 # open up current logfile and continue try: line = self._get_next_line() except StopIteration: # oops, empty file self._update_offset_file() raise else: self._update_offset_file() raise if self.paranoid: self._update_offset_file() elif self.every_n and self.every_n <= self._since_update: self._update_offset_file() return line def __next__(self): """`__next__` is the Python 3 version of `next`""" return self.next() def readlines(self): """ Read in all unread lines and return them as a list. """ return [line for line in self] def read(self): """ Read in all unread lines and return them as a single string. """ lines = self.readlines() if lines: try: return ''.join(lines) except TypeError: return ''.join(force_text(line) for line in lines) else: return None def _is_closed(self): if not self._fh: return True try: return self._fh.closed except AttributeError: if isinstance(self._fh, gzip.GzipFile): # python 2.6 return self._fh.fileobj is None else: raise def _filehandle(self): """ Return a filehandle to the file being tailed, with the position set to the current offset. """ if not self._fh or self._is_closed(): filename = self._rotated_logfile or self.filename if filename.endswith('.gz'): self._fh = gzip.open(filename, 'r') else: self._fh = open(filename, "r", 1) self._fh.seek(self._offset) return self._fh def _update_offset_file(self): """ Update the offset file with the current inode and offset. """ if self.on_update: self.on_update() offset = self._filehandle().tell() inode = stat(self.filename).st_ino fh = open(self._offset_file, "w") fh.write("%s\n%s\n" % (inode, offset)) fh.close() self._since_update = 0 def _determine_rotated_logfile(self): """ We suspect the logfile has been rotated, so try to guess what the rotated filename is, and return it. """ rotated_filename = self._check_rotated_filename_candidates() if rotated_filename and exists(rotated_filename): if stat(rotated_filename).st_ino == self._offset_file_inode: return rotated_filename # if the inode hasn't changed, then the file shrank; this is expected with copytruncate, # otherwise print a warning if stat(self.filename).st_ino == self._offset_file_inode: if self.copytruncate: return rotated_filename else: sys.stderr.write( "[pygtail] [WARN] file size of %s shrank, and copytruncate support is " "disabled (expected at least %d bytes, was %d bytes).\n" % (self.filename, self._offset, stat(self.filename).st_size)) return None def _check_rotated_filename_candidates(self): """ Check for various rotated logfile filename patterns and return the first match we find. """ # savelog(8) candidate = "%s.0" % self.filename if (exists(candidate) and exists("%s.1.gz" % self.filename) and (stat(candidate).st_mtime > stat("%s.1.gz" % self.filename).st_mtime)): return candidate # logrotate(8) # with delaycompress candidate = "%s.1" % self.filename if exists(candidate): return candidate # without delaycompress candidate = "%s.1.gz" % self.filename if exists(candidate): return candidate # dateext rotation scheme candidates = glob.glob("%s-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]" % self.filename) if candidates: candidates.sort() return candidates[-1] # return most recent # for TimedRotatingFileHandler candidates = glob.glob("%s.[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]" % self.filename) if candidates: candidates.sort() return candidates[-1] # return most recent # no match return None def _get_next_line(self): line = self._filehandle().readline() if not line: raise StopIteration self._since_update += 1 return line def main(): # command-line parsing cmdline = OptionParser(usage="usage: %prog [options] logfile", description="Print log file lines that have not been read.") cmdline.add_option("--offset-file", "-o", action="store", help="File to which offset data is written (default: .offset).") cmdline.add_option("--paranoid", "-p", action="store_true", help="Update the offset file every time we read a line (as opposed to" " only when we reach the end of the file).") cmdline.add_option("--every-n", "-n", action="store", help="Update the offset file every n'th time we read a line (as opposed to" " only when we reach the end of the file).") cmdline.add_option("--no-copytruncate", action="store_true", help="Don't support copytruncate-style log rotation. Instead, if the log file" " shrinks, print a warning.") cmdline.add_option("--version", action="store_true", help="Print version and exit.") options, args = cmdline.parse_args() if options.version: print("pygtail version", __version__) sys.exit(0) if (len(args) != 1): cmdline.error("Please provide a logfile to read.") if options.every_n: options.every_n = int(options.every_n) pygtail = Pygtail(args[0], offset_file=options.offset_file, paranoid=options.paranoid, every_n=options.every_n, copytruncate=not options.no_copytruncate) for line in pygtail: sys.stdout.write(line) if __name__ == "__main__": main() pygtail-0.6.1/pygtail/test/000077500000000000000000000000001261702457000156235ustar00rootroot00000000000000pygtail-0.6.1/pygtail/test/__init__.py000066400000000000000000000000011261702457000177230ustar00rootroot00000000000000#pygtail-0.6.1/pygtail/test/test_pygtail.py000066400000000000000000000147711261702457000207170ustar00rootroot00000000000000import os import sys try: # python 2.6 import unittest2 as unittest except ImportError: import unittest import shutil import tempfile import gzip import io from pygtail import Pygtail PY2 = sys.version_info[0] == 2 class PygtailTest(unittest.TestCase): # TODO: # - test for non-default offset file # - test for savelog and datext rotation schemes def setUp(self): self.test_lines = ["1\n", "2\n", "3\n"] self.test_str = ''.join(self.test_lines) self.logfile = tempfile.NamedTemporaryFile(delete=False) self.logfile.write(self.test_str.encode('utf-8')) self.logfile.close() def append(self, str): # append the give string to the temp logfile fh = open(self.logfile.name, "a") fh.write(str) fh.close() def copytruncate(self): shutil.copyfile(self.logfile.name, "%s.1" % self.logfile.name) fh = open(self.logfile.name, "w") fh.close() def tearDown(self): filename = self.logfile.name for tmpfile in [filename, filename + ".offset", filename + ".1", filename + ".1.gz"]: if os.path.exists(tmpfile): os.remove(tmpfile) def test_read(self): pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.read(), self.test_str) def test_readlines(self): pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.readlines(), self.test_lines) def test_subsequent_read_with_no_new_data(self): pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.read(), self.test_str) self.assertEqual(pygtail.read(), None) def test_subsequent_read_with_new_data(self): pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.read(), self.test_str) new_lines = "4\n5\n" self.append(new_lines) new_pygtail = Pygtail(self.logfile.name) self.assertEqual(new_pygtail.read(), new_lines) def test_logrotate_without_delay_compress(self): new_lines = ["4\n5\n", "6\n7\n"] pygtail = Pygtail(self.logfile.name) pygtail.read() self.append(new_lines[0]) # put content to gzip file gzip_handle = gzip.open("%s.1.gz" % self.logfile.name, 'wb') with open(self.logfile.name, 'rb') as logfile: gzip_handle.write(logfile.read()) gzip_handle.close() with open(self.logfile.name, 'w'): # truncate file pass self.append(new_lines[1]) pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.read(), ''.join(new_lines)) def test_logrotate_with_delay_compress(self): new_lines = ["4\n5\n", "6\n7\n"] pygtail = Pygtail(self.logfile.name) pygtail.read() self.append(new_lines[0]) os.rename(self.logfile.name, "%s.1" % self.logfile.name) self.append(new_lines[1]) pygtail = Pygtail(self.logfile.name) self.assertEqual(pygtail.read(), ''.join(new_lines)) def test_copytruncate_off_smaller(self): self.test_readlines() self.copytruncate() new_lines = "4\n5\n" self.append(new_lines) sys.stderr = captured = io.BytesIO() if PY2 else io.StringIO() pygtail = Pygtail(self.logfile.name, copytruncate=False) captured_value = captured.getvalue() sys.stderr = sys.__stderr__ assert_class = self.assertRegex if sys.version_info >= (3, 1) else self.assertRegexpMatches assert_class(captured_value, r".*?\bWARN\b.*?\bshrank\b.*") self.assertEqual(pygtail.read(), None) def test_copytruncate_on_smaller(self): self.test_readlines() self.copytruncate() new_lines = "4\n5\n" self.append(new_lines) pygtail = Pygtail(self.logfile.name, copytruncate=True) self.assertEqual(pygtail.read(), new_lines) def _test_copytruncate_larger(self, onoff): self.test_readlines() self.copytruncate() self.append(self.test_str) new_lines = "4\n5\n" self.append(new_lines) pygtail = Pygtail(self.logfile.name, copytruncate=onoff) self.assertEqual(pygtail.read(), new_lines) def test_copytruncate_larger_off(self): self._test_copytruncate_larger(False) def test_copytruncate_larger_on(self): self._test_copytruncate_larger(True) def test_offset_file(self): pygtail = Pygtail(self.logfile.name, paranoid=True) log_inode = os.stat(self.logfile.name).st_ino next(pygtail) with open(self.logfile.name + '.offset', 'r') as f: inode, offset = int(next(f)), int(next(f)) self.assertEqual(inode, log_inode) self.assertEqual(offset, 2) next(pygtail) with open(self.logfile.name + '.offset', 'r') as f: inode, offset = int(next(f)), int(next(f)) self.assertEqual(inode, log_inode) self.assertEqual(offset, 4) next(pygtail) with open(self.logfile.name + '.offset', 'r') as f: inode, offset = int(next(f)), int(next(f)) self.assertEqual(inode, log_inode) self.assertEqual(offset, 6) def test_on_update_with_paranoid(self): updates = [0] def record_update(): updates[0] += 1 pygtail = Pygtail(self.logfile.name, paranoid=True, on_update=record_update) self.assertEqual(updates[0], 0) next(pygtail) self.assertEqual(updates[0], 1) next(pygtail) self.assertEqual(updates[0], 2) next(pygtail) self.assertEqual(updates[0], 3) def test_on_update_without_paranoid(self): updates = [0] def record_update(): updates[0] += 1 pygtail = Pygtail(self.logfile.name, on_update=record_update) self.assertEqual(updates[0], 0) for line in pygtail: self.assertEqual(updates[0], 0) self.assertEqual(updates[0], 1) def test_every_n(self): updates = [0] # We save before returning the second line. # We save at the end of the file with all 3 recorded. expected = [1, 3] previous_lines = 0 def record_update(): self.assertEqual(previous_lines, expected[updates[0]]) updates[0] += 1 pygtail = Pygtail(self.logfile.name, every_n=2, on_update=record_update) self.assertEqual(updates[0], 0) for line in pygtail: previous_lines += 1 def main(): unittest.main(buffer=True) if __name__ == "__main__": main() pygtail-0.6.1/pypi.txt000066400000000000000000000002371261702457000147170ustar00rootroot00000000000000To update the version on PyPi: 1. Update __version__ in pygtail/core.py 2. Update debian/changelog 3. python setup.py register 4. python setup.py sdist uploadpygtail-0.6.1/setup.py000066400000000000000000000026351261702457000147130ustar00rootroot00000000000000import os from setuptools import setup from pygtail import __version__ def main(): cwd = os.path.dirname(os.path.abspath(__file__)) path = os.path.join(cwd, 'README.txt') readme = open(path, 'r').read() setup( name = 'pygtail', version = __version__, description = 'Reads log file lines that have not been read.', license = 'GPL v2', author = 'Brad Greenlee', author_email = 'brad@footle.org', keywords = ['logging', 'tail', 'logtail2'], url = 'http://github.com/bgreenlee/pygtail', packages = ['pygtail'], entry_points = { 'console_scripts': ['pygtail=pygtail.core:main'] }, test_suite='pygtail.test', classifiers = [ "Development Status :: 4 - Beta", "Intended Audience :: Developers", "License :: OSI Approved :: GNU General Public License (GPL)", "Operating System :: MacOS :: MacOS X", "Operating System :: POSIX :: Linux", "Operating System :: Unix", "Programming Language :: Python", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Topic :: Software Development :: Libraries :: Python Modules", "Topic :: System :: Logging" ], long_description = readme ) if __name__ == '__main__': main() pygtail-0.6.1/tox.ini000066400000000000000000000006011261702457000145030ustar00rootroot00000000000000# Tox (http://codespeak.net/~hpk/tox/) is a tool for running tests # in multiple virtualenvs. This configuration file will run the # test suite on all supported python versions. To use it, "pip install tox" # and then run "tox" from this directory. [tox] minversion=1.8.0 envlist = py26, py27, py31, py32, py33, pypy [testenv] commands = python setup.py test deps = py26: unittest2