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#! /usr/bin/env python
# print md5 checksum for files
bufsize = 8096
fnfilter = None
rmode = 'r'
usage = """
usage: sum5 [-b] [-t] [-l] [-s bufsize] [file ...]
-b : read files in binary mode
-t : read files in text mode (default)
-l : print last pathname component only
-s bufsize: read buffer size (default %d)
file ... : files to sum; '-' or no files means stdin
""" % bufsize
import sys
import string
import os
import md5
import regsub
StringType = type('')
FileType = type(sys.stdin)
def sum(*files):
sts = 0
if files and type(files[-1]) == FileType:
out, files = files[-1], files[:-1]
else:
out = sys.stdout
if len(files) == 1 and type(files[0]) != StringType:
files = files[0]
for f in files:
if type(f) == StringType:
if f == '-':
sts = printsumfp(sys.stdin, '<stdin>', out) or sts
else:
sts = printsum(f, out) or sts
else:
sts = sum(f, out) or sts
return sts
def printsum(file, out = sys.stdout):
try:
fp = open(file, rmode)
except IOError, msg:
sys.stderr.write('%s: Can\'t open: %s\n' % (file, msg))
return 1
if fnfilter:
file = fnfilter(file)
sts = printsumfp(fp, file, out)
fp.close()
return sts
def printsumfp(fp, file, out = sys.stdout):
m = md5.new()
try:
while 1:
data = fp.read(bufsize)
if not data: break
m.update(data)
except IOError, msg:
sys.stderr.write('%s: I/O error: %s\n' % (file, msg))
return 1
out.write('%s %s\n' % (hexify(m.digest()), file))
return 0
def hexify(s):
res = ''
for c in s:
res = res + '%02x' % ord(c)
return res
def main(args = sys.argv[1:], out = sys.stdout):
global fnfilter, rmode, bufsize
import getopt
try:
opts, args = getopt.getopt(args, 'blts:')
except getopt.error, msg:
sys.stderr.write('%s: %s\n%s' % (sys.argv[0], msg, usage))
return 2
for o, a in opts:
if o == '-l':
fnfilter = os.path.basename
if o == '-b':
rmode = 'rb'
if o == '-t':
rmode = 'r'
if o == '-s':
bufsize = string.atoi(a)
if not args: args = ['-']
return sum(args, out)
if __name__ == '__main__' or __name__ == sys.argv[0]:
sys.exit(main(sys.argv[1:], sys.stdout))
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