From e5f5a2ab23ace19c6de39512f76f8fed5f5ad912 Mon Sep 17 00:00:00 2001
From: Guido Guenther <agx@sigxcpu.org>
Date: Thu, 23 Aug 2007 15:47:20 +0200
Subject: Imported upstream version 0.6.21

---
 lib/ChangeFile.py | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 lib/ChangeFile.py

(limited to 'lib/ChangeFile.py')

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:
-- 
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