aboutsummaryrefslogtreecommitdiff
path: root/lib/ChangeFile.py
diff options
context:
space:
mode:
Diffstat (limited to 'lib/ChangeFile.py')
-rw-r--r--lib/ChangeFile.py109
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/ChangeFile.py b/lib/ChangeFile.py
new file mode 100644
index 0000000..b74e623
--- /dev/null
+++ b/lib/ChangeFile.py
@@ -0,0 +1,109 @@
+# 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: