Tools/scripts/md5sum.py

   1 #! /usr/bin/env python
   2
   3 """Python utility to print MD5 checksums of argument files.
   4 """
   5
   6
   7 bufsize = 8096
   8 fnfilter = None
   9 rmode = 'rb'
  10
  11 usage = """
  12 usage: sum5 [-b] [-t] [-l] [-s bufsize] [file ...]
  13 -b        : read files in binary mode (default)
  14 -t        : read files in text mode (you almost certainly don't want this!)
  15 -l        : print last pathname component only
  16 -s bufsize: read buffer size (default %d)
  17 file ...  : files to sum; '-' or no files means stdin
  18 """ % bufsize
  19
  20 import sys
  21 import os
  22 import getopt
  23 import md5
  24
  25 def sum(*files):
  26     sts = 0
  27     if files and isinstance(files[-1], file):
  28         out, files = files[-1], files[:-1]
  29     else:
  30         out = sys.stdout
  31     if len(files) == 1 and not isinstance(files[0], str):
  32         files = files[0]
  33     for f in files:
  34         if isinstance(f, str):
  35             if f == '-':
  36                 sts = printsumfp(sys.stdin, '<stdin>', out) or sts
  37             else:
  38                 sts = printsum(f, out) or sts
  39         else:
  40             sts = sum(f, out) or sts
  41     return sts
  42
  43 def printsum(filename, out=sys.stdout):
  44     try:
  45         fp = open(filename, rmode)
  46     except IOError, msg:
  47         sys.stderr.write('%s: Can\'t open: %s\n' % (filename, msg))
  48         return 1
  49     if fnfilter:
  50         filename = fnfilter(filename)
  51     sts = printsumfp(fp, filename, out)
  52     fp.close()
  53     return sts
  54
  55 def printsumfp(fp, filename, out=sys.stdout):
  56     m = md5.new()
  57     try:
  58         while 1:
  59             data = fp.read(bufsize)
  60             if not data:
  61                 break
  62             m.update(data)
  63     except IOError, msg:
  64         sys.stderr.write('%s: I/O error: %s\n' % (filename, msg))
  65         return 1
  66     out.write('%s %s\n' % (m.hexdigest(), filename))
  67     return 0
  68
  69 def main(args = sys.argv[1:], out=sys.stdout):
  70     global fnfilter, rmode, bufsize
  71     try:
  72         opts, args = getopt.getopt(args, 'blts:')
  73     except getopt.error, msg:
  74         sys.stderr.write('%s: %s\n%s' % (sys.argv[0], msg, usage))
  75         return 2
  76     for o, a in opts:
  77         if o == '-l':
  78             fnfilter = os.path.basename
  79         elif o == '-b':
  80             rmode = 'rb'
  81         elif o == '-t':
  82             rmode = 'r'
  83         elif o == '-s':
  84             bufsize = int(a)
  85     if not args:
  86         args = ['-']
  87     return sum(args, out)
  88
  89 if __name__ == '__main__' or __name__ == sys.argv[0]:
  90     sys.exit(main(sys.argv[1:], sys.stdout))