| 1 | n/a | #! /usr/bin/env python3 |
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| 2 | n/a | |
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| 3 | n/a | """Python utility to print MD5 checksums of argument files. |
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| 4 | n/a | """ |
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| 5 | n/a | |
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| 6 | n/a | |
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| 7 | n/a | bufsize = 8096 |
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| 8 | n/a | fnfilter = None |
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| 9 | n/a | rmode = 'rb' |
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| 10 | n/a | |
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| 11 | n/a | usage = """ |
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| 12 | n/a | usage: md5sum.py [-b] [-t] [-l] [-s bufsize] [file ...] |
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| 13 | n/a | -b : read files in binary mode (default) |
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| 14 | n/a | -t : read files in text mode (you almost certainly don't want this!) |
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| 15 | n/a | -l : print last pathname component only |
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| 16 | n/a | -s bufsize: read buffer size (default %d) |
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| 17 | n/a | file ... : files to sum; '-' or no files means stdin |
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| 18 | n/a | """ % bufsize |
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| 19 | n/a | |
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| 20 | n/a | import io |
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| 21 | n/a | import sys |
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| 22 | n/a | import os |
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| 23 | n/a | import getopt |
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| 24 | n/a | from hashlib import md5 |
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| 25 | n/a | |
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| 26 | n/a | def sum(*files): |
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| 27 | n/a | sts = 0 |
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| 28 | n/a | if files and isinstance(files[-1], io.IOBase): |
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| 29 | n/a | out, files = files[-1], files[:-1] |
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| 30 | n/a | else: |
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| 31 | n/a | out = sys.stdout |
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| 32 | n/a | if len(files) == 1 and not isinstance(files[0], str): |
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| 33 | n/a | files = files[0] |
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| 34 | n/a | for f in files: |
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| 35 | n/a | if isinstance(f, str): |
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| 36 | n/a | if f == '-': |
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| 37 | n/a | sts = printsumfp(sys.stdin, '<stdin>', out) or sts |
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| 38 | n/a | else: |
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| 39 | n/a | sts = printsum(f, out) or sts |
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| 40 | n/a | else: |
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| 41 | n/a | sts = sum(f, out) or sts |
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| 42 | n/a | return sts |
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| 43 | n/a | |
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| 44 | n/a | def printsum(filename, out=sys.stdout): |
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| 45 | n/a | try: |
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| 46 | n/a | fp = open(filename, rmode) |
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| 47 | n/a | except IOError as msg: |
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| 48 | n/a | sys.stderr.write('%s: Can\'t open: %s\n' % (filename, msg)) |
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| 49 | n/a | return 1 |
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| 50 | n/a | if fnfilter: |
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| 51 | n/a | filename = fnfilter(filename) |
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| 52 | n/a | sts = printsumfp(fp, filename, out) |
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| 53 | n/a | fp.close() |
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| 54 | n/a | return sts |
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| 55 | n/a | |
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| 56 | n/a | def printsumfp(fp, filename, out=sys.stdout): |
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| 57 | n/a | m = md5() |
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| 58 | n/a | try: |
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| 59 | n/a | while 1: |
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| 60 | n/a | data = fp.read(bufsize) |
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| 61 | n/a | if not data: |
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| 62 | n/a | break |
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| 63 | n/a | if isinstance(data, str): |
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| 64 | n/a | data = data.encode(fp.encoding) |
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| 65 | n/a | m.update(data) |
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| 66 | n/a | except IOError as msg: |
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| 67 | n/a | sys.stderr.write('%s: I/O error: %s\n' % (filename, msg)) |
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| 68 | n/a | return 1 |
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| 69 | n/a | out.write('%s %s\n' % (m.hexdigest(), filename)) |
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| 70 | n/a | return 0 |
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| 71 | n/a | |
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| 72 | n/a | def main(args = sys.argv[1:], out=sys.stdout): |
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| 73 | n/a | global fnfilter, rmode, bufsize |
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| 74 | n/a | try: |
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| 75 | n/a | opts, args = getopt.getopt(args, 'blts:') |
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| 76 | n/a | except getopt.error as msg: |
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| 77 | n/a | sys.stderr.write('%s: %s\n%s' % (sys.argv[0], msg, usage)) |
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| 78 | n/a | return 2 |
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| 79 | n/a | for o, a in opts: |
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| 80 | n/a | if o == '-l': |
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| 81 | n/a | fnfilter = os.path.basename |
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| 82 | n/a | elif o == '-b': |
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| 83 | n/a | rmode = 'rb' |
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| 84 | n/a | elif o == '-t': |
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| 85 | n/a | rmode = 'r' |
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| 86 | n/a | elif o == '-s': |
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| 87 | n/a | bufsize = int(a) |
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| 88 | n/a | if not args: |
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| 89 | n/a | args = ['-'] |
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| 90 | n/a | return sum(args, out) |
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| 91 | n/a | |
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| 92 | n/a | if __name__ == '__main__' or __name__ == sys.argv[0]: |
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| 93 | n/a | sys.exit(main(sys.argv[1:], sys.stdout)) |
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