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# ChangeFile
# A class which represents a Debian change file.
# Copyright 2002 Colin Walters <walters@gnu.org>
# This file 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.
import os, re, sys, string, stat, popen2
import threading, Queue
import logging
from minidinstall import DpkgControl, SignedFile
class ChangeFileException(Exception):
def __init__(self, value):
self._value = value
def __str__(self):
return `self._value`
class ChangeFile(DpkgControl.DpkgParagraph):
def __init__(self):
DpkgControl.DpkgParagraph.__init__(self)
self._logger = logging.getLogger("mini-dinstall")
def load_from_file(self, filename):
f = SignedFile.SignedFile(open(filename))
self.load(f)
f.close()
def getFiles(self):
out = []
try:
files = self['files']
except KeyError:
return []
lineregexp = re.compile("^([0-9a-f]{32})[ \t]+(\d+)[ \t]+([-/a-zA-Z0-9]+)[ \t]+([-a-zA-Z0-9]+)[ \t]+([0-9a-zA-Z][-+:.,=~0-9a-zA-Z_]+)$")
for line in files:
if line == '':
continue
match = lineregexp.match(line)
if (match is None):
raise ChangeFileException("Couldn't parse file entry \"%s\" in Files field of .changes" % (line,))
out.append((match.group(1), match.group(2), match.group(3), match.group(4), match.group(5)))
return out
def verify(self, sourcedir):
for (md5sum, size, section, prioriy, filename) in self.getFiles():
self._verify_file_integrity(os.path.join(sourcedir, filename), int(size), md5sum)
def _verify_file_integrity(self, filename, expected_size, expected_md5sum):
self._logger.debug('Checking integrity of %s' % (filename,))
try:
statbuf = os.stat(filename)
if not stat.S_ISREG(statbuf[stat.ST_MODE]):
raise ChangeFileException("%s is not a regular file" % (filename,))
size = statbuf[stat.ST_SIZE]
except OSError, e:
raise ChangeFileException("Can't stat %s: %s" % (filename,e.strerror))
if size != expected_size:
raise ChangeFileException("File size for %s does not match that specified in .dsc" % (filename,))
if (self._get_file_md5sum(filename) != expected_md5sum):
raise ChangeFileException("md5sum for %s does not match that specified in .dsc" % (filename,))
self._logger.debug('Verified md5sum %s and size %s for %s' % (expected_md5sum, expected_size, filename))
def _get_file_md5sum(self, filename):
if os.access('/usr/bin/md5sum', os.X_OK):
cmd = '/usr/bin/md5sum %s' % (filename,)
self._logger.debug("Running: %s" % (cmd,))
child = popen2.Popen3(cmd, 1)
child.tochild.close()
erroutput = child.childerr.read()
child.childerr.close()
if erroutput != '':
child.fromchild.close()
raise ChangeFileException("md5sum returned error output \"%s\"" % (erroutput,))
(md5sum, filename) = string.split(child.fromchild.read(), None, 1)
child.fromchild.close()
status = child.wait()
if not (status is None or (os.WIFEXITED(status) and os.WEXITSTATUS(status) == 0)):
if os.WIFEXITED(status):
msg = "md5sum exited with error code %d" % (os.WEXITSTATUS(status),)
elif os.WIFSTOPPED(status):
msg = "md5sum stopped unexpectedly with signal %d" % (os.WSTOPSIG(status),)
elif os.WIFSIGNALED(status):
msg = "md5sum died with signal %d" % (os.WTERMSIG(status),)
raise ChangeFileException(msg)
return md5sum.strip()
import md5
f = open(filename)
md5sum = md5.new()
buf = f.read(8192)
while buf != '':
md5sum.update(buf)
buf = f.read(8192)
return md5sum.hexdigest()
# vim:ts=4:sw=4:et:
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