#! /usr/bin/env python | |
# Copyright 1994 by Lance Ellinghouse | |
# Cathedral City, California Republic, United States of America. | |
# All Rights Reserved | |
# Permission to use, copy, modify, and distribute this software and its | |
# documentation for any purpose and without fee is hereby granted, | |
# provided that the above copyright notice appear in all copies and that | |
# both that copyright notice and this permission notice appear in | |
# supporting documentation, and that the name of Lance Ellinghouse | |
# not be used in advertising or publicity pertaining to distribution | |
# of the software without specific, written prior permission. | |
# LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
# FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE | |
# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
# | |
# Modified by Jack Jansen, CWI, July 1995: | |
# - Use binascii module to do the actual line-by-line conversion | |
# between ascii and binary. This results in a 1000-fold speedup. The C | |
# version is still 5 times faster, though. | |
# - Arguments more compliant with python standard | |
"""Implementation of the UUencode and UUdecode functions. | |
encode(in_file, out_file [,name, mode]) | |
decode(in_file [, out_file, mode]) | |
""" | |
import binascii | |
import os | |
import sys | |
__all__ = ["Error", "encode", "decode"] | |
class Error(Exception): | |
pass | |
def encode(in_file, out_file, name=None, mode=None): | |
"""Uuencode file""" | |
# | |
# If in_file is a pathname open it and change defaults | |
# | |
opened_files = [] | |
try: | |
if in_file == '-': | |
in_file = sys.stdin | |
elif isinstance(in_file, basestring): | |
if name is None: | |
name = os.path.basename(in_file) | |
if mode is None: | |
try: | |
mode = os.stat(in_file).st_mode | |
except AttributeError: | |
pass | |
in_file = open(in_file, 'rb') | |
opened_files.append(in_file) | |
# | |
# Open out_file if it is a pathname | |
# | |
if out_file == '-': | |
out_file = sys.stdout | |
elif isinstance(out_file, basestring): | |
out_file = open(out_file, 'wb') | |
opened_files.append(out_file) | |
# | |
# Set defaults for name and mode | |
# | |
if name is None: | |
name = '-' | |
if mode is None: | |
mode = 0666 | |
# | |
# Write the data | |
# | |
out_file.write('begin %o %s\n' % ((mode&0777),name)) | |
data = in_file.read(45) | |
while len(data) > 0: | |
out_file.write(binascii.b2a_uu(data)) | |
data = in_file.read(45) | |
out_file.write(' \nend\n') | |
finally: | |
for f in opened_files: | |
f.close() | |
def decode(in_file, out_file=None, mode=None, quiet=0): | |
"""Decode uuencoded file""" | |
# | |
# Open the input file, if needed. | |
# | |
opened_files = [] | |
if in_file == '-': | |
in_file = sys.stdin | |
elif isinstance(in_file, basestring): | |
in_file = open(in_file) | |
opened_files.append(in_file) | |
try: | |
# | |
# Read until a begin is encountered or we've exhausted the file | |
# | |
while True: | |
hdr = in_file.readline() | |
if not hdr: | |
raise Error('No valid begin line found in input file') | |
if not hdr.startswith('begin'): | |
continue | |
hdrfields = hdr.split(' ', 2) | |
if len(hdrfields) == 3 and hdrfields[0] == 'begin': | |
try: | |
int(hdrfields[1], 8) | |
break | |
except ValueError: | |
pass | |
if out_file is None: | |
out_file = hdrfields[2].rstrip() | |
if os.path.exists(out_file): | |
raise Error('Cannot overwrite existing file: %s' % out_file) | |
if mode is None: | |
mode = int(hdrfields[1], 8) | |
# | |
# Open the output file | |
# | |
if out_file == '-': | |
out_file = sys.stdout | |
elif isinstance(out_file, basestring): | |
fp = open(out_file, 'wb') | |
try: | |
os.path.chmod(out_file, mode) | |
except AttributeError: | |
pass | |
out_file = fp | |
opened_files.append(out_file) | |
# | |
# Main decoding loop | |
# | |
s = in_file.readline() | |
while s and s.strip() != 'end': | |
try: | |
data = binascii.a2b_uu(s) | |
except binascii.Error, v: | |
# Workaround for broken uuencoders by /Fredrik Lundh | |
nbytes = (((ord(s[0])-32) & 63) * 4 + 5) // 3 | |
data = binascii.a2b_uu(s[:nbytes]) | |
if not quiet: | |
sys.stderr.write("Warning: %s\n" % v) | |
out_file.write(data) | |
s = in_file.readline() | |
if not s: | |
raise Error('Truncated input file') | |
finally: | |
for f in opened_files: | |
f.close() | |
def test(): | |
"""uuencode/uudecode main program""" | |
import optparse | |
parser = optparse.OptionParser(usage='usage: %prog [-d] [-t] [input [output]]') | |
parser.add_option('-d', '--decode', dest='decode', help='Decode (instead of encode)?', default=False, action='store_true') | |
parser.add_option('-t', '--text', dest='text', help='data is text, encoded format unix-compatible text?', default=False, action='store_true') | |
(options, args) = parser.parse_args() | |
if len(args) > 2: | |
parser.error('incorrect number of arguments') | |
sys.exit(1) | |
input = sys.stdin | |
output = sys.stdout | |
if len(args) > 0: | |
input = args[0] | |
if len(args) > 1: | |
output = args[1] | |
if options.decode: | |
if options.text: | |
if isinstance(output, basestring): | |
output = open(output, 'w') | |
else: | |
print sys.argv[0], ': cannot do -t to stdout' | |
sys.exit(1) | |
decode(input, output) | |
else: | |
if options.text: | |
if isinstance(input, basestring): | |
input = open(input, 'r') | |
else: | |
print sys.argv[0], ': cannot do -t from stdin' | |
sys.exit(1) | |
encode(input, output) | |
if __name__ == '__main__': | |
test() |