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