[ python-Bugs-1543801 ] md5 sums are different between Solaris and Windows XP SP1

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Bugs item #1543801, was opened at 2006-08-21 08:21
Message generated for change (Comment added) made by gbrandl
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Category: Python Library
Group: Python 2.3
>Status: Pending
Resolution: None
Priority: 5
Submitted By: Stefan Sonnenberg (sunmountain)
Assigned to: Nobody/Anonymous (nobody)
Summary: md5 sums are different between Solaris and Windows XP SP1

Initial Comment:
The following program produces
different md5 sums under Solaris and Windows XP,
but sums are equal under the same platform.

#!/opt/ASpy23/bin/python
import sys
import md5
import getopt
import os
import re

try:
    opts,args = getopt.getopt(sys.argv[1:],'c:f:h')
except getopt.GetoptError,e:
    print 'Parsing command line arguments failed. (%s)'
% str(e)
    sys.exit(1)

md5file = None
fname = None

for o,a in opts:
   if o in '-c':
       if fname is not None:
           print '-c and -f are mutually exclusive'
           sys.exit(1)
       md5file = a
   if o in '-f':
       if md5file is not None:
           print '-c and -f are mutually exclusive'
           sys.exit(1)
       fname = a
   if o in '-h':
       print 'Usage: md5 filename. (%s)' % str(e)
       sys.exit(1)

if md5file is not None and os.path.isfile(md5file):
    try:
        lines = open(md5file,'r').readlines()
    except IOError,e: 
        print 'Could not read MD5 sum file %s. (%s)' %
(md5file,str(e))
        sys.exit(1)
    for line in lines:
        line = line[:-1]
        try:
            res = re.compile('MD5[ |\t]+\((.+)\)[
|\t]+?\=[ |\t]+(.+)').findall(line)[0]
        except Exception,e:
            print 'Could not parse line. (%s)' % str(e)
            sys.exit(1)
        if os.path.isfile(res[0]):
            try:
                f = open(res[0],'r')
            except IOError,e:
                print 'Could not open file %s. (%s)' %
(res[0],str(e))
                sys.exit(1)
            sum = md5.new()
            try:
                sum.update(f.read())
            except Exception,e:
                print 'Could not update MD5 sum. (%s)'
% str(e)
                sys.exit(1)
            #print sum.hexdigest(),res[1][2:],res[0],line
            if sum.hexdigest() == res[1][2:]:
                print 'MD5 sum of file %s is OK' % res[0]
            else:
                print 'MD5 sum of file %s DIFFERS' % res[0]
            f.close()
            sum = None
    sys.exit(0)

sum = md5.new()
try:
    f = open(fname,'r')
except IOError,e:
    print 'Could not open %s. (%s)' % ( fname,str(e) )
try:
    sum.update(f.read())
except Exception,e:
    print 'Could not update md5 sum. (%s)' % str(e)
print 'MD5  (%s) = 0x%s' % (fname,sum.hexdigest())
f.close()

Python version Solaris:
Python 2.3.5 (#1, Feb  9 2005, 14:45:39) [C] on sunos5

Python version Windows XP:
Python 2.3.5 (#62, Feb  9 2005, 16:17:08) [MSC v.1200
32 bit (Intel)] on win32


----------------------------------------------------------------------

>Comment By: Georg Brandl (gbrandl)
Date: 2006-08-21 09:06

Message:
Logged In: YES 
user_id=849994

You're opening files in text mode, which is likely to return
different file contents on Windows and Unix.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1543801&group_id=5470