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chromium / external / github.com / python / cpython / refs/tags/2.0 / . / Lib / uu.py
blob: e39b61bff341ef9a97f402770818652fe410bff4 [file] [log] [blame]
Guido van Rossum105bd981997-07-11 18:39:03[diff] [blame]1#! /usr/bin/env python
2
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]3# Copyright 1994 by Lance Ellinghouse
4# Cathedral City, California Republic, United States of America.
5# All Rights Reserved
6# Permission to use, copy, modify, and distribute this software and its
7# documentation for any purpose and without fee is hereby granted,
8# provided that the above copyright notice appear in all copies and that
9# both that copyright notice and this permission notice appear in
10# supporting documentation, and that the name of Lance Ellinghouse
11# not be used in advertising or publicity pertaining to distribution
12# of the software without specific, written prior permission.
13# LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
14# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
15# FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
16# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
19# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Jack Jansen0a2eaac1995-08-07 14:37:38[diff] [blame]20#
21# Modified by Jack Jansen, CWI, July 1995:
22# - Use binascii module to do the actual line-by-line conversion
23# between ascii and binary. This results in a 1000-fold speedup. The C
24# version is still 5 times faster, though.
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]25# - Arguments more compliant with python standard
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]26
Guido van Rossume7b146f2000-02-04 15:28:42[diff] [blame]27"""Implementation of the UUencode and UUdecode functions.
28
29encode(in_file, out_file [,name, mode])
30decode(in_file [, out_file, mode])
31"""
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]32
Jack Jansen0a2eaac1995-08-07 14:37:38[diff] [blame]33import binascii
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]34import os
35import string
Guido van Rossumfbba3041998-10-22 16:18:25[diff] [blame]36import sys
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]37
Fred Drake9b8d8012000-08-17 04:45:13[diff] [blame]38class Error(Exception):
39 pass
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]40
41def encode(in_file, out_file, name=None, mode=None):
42 """Uuencode file"""
43 #
44 # If in_file is a pathname open it and change defaults
45 #
46 if in_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]47 in_file = sys.stdin
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]48 elif type(in_file) == type(''):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]49 if name == None:
50 name = os.path.basename(in_file)
51 if mode == None:
52 try:
53 mode = os.stat(in_file)[0]
54 except AttributeError:
55 pass
56 in_file = open(in_file, 'rb')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]57 #
58 # Open out_file if it is a pathname
59 #
60 if out_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]61 out_file = sys.stdout
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]62 elif type(out_file) == type(''):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]63 out_file = open(out_file, 'w')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]64 #
65 # Set defaults for name and mode
66 #
67 if name == None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]68 name = '-'
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]69 if mode == None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]70 mode = 0666
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]71 #
72 # Write the data
73 #
74 out_file.write('begin %o %s\n' % ((mode&0777),name))
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]75 str = in_file.read(45)
76 while len(str) > 0:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]77 out_file.write(binascii.b2a_uu(str))
78 str = in_file.read(45)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]79 out_file.write(' \nend\n')
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]80
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]81
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]82def decode(in_file, out_file=None, mode=None):
83 """Decode uuencoded file"""
84 #
85 # Open the input file, if needed.
86 #
87 if in_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]88 in_file = sys.stdin
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]89 elif type(in_file) == type(''):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]90 in_file = open(in_file)
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]91 #
Guido van Rossum2ebaa171997-04-08 19:46:02[diff] [blame]92 # Read until a begin is encountered or we've exhausted the file
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]93 #
Guido van Rossum3ccd2f11997-04-08 19:46:53[diff] [blame]94 while 1:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]95 hdr = in_file.readline()
96 if not hdr:
97 raise Error, 'No valid begin line found in input file'
98 if hdr[:5] != 'begin':
99 continue
100 hdrfields = string.split(hdr)
101 if len(hdrfields) == 3 and hdrfields[0] == 'begin':
102 try:
103 string.atoi(hdrfields[1], 8)
104 break
105 except ValueError:
106 pass
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]107 if out_file == None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]108 out_file = hdrfields[2]
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]109 if mode == None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]110 mode = string.atoi(hdrfields[1], 8)
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]111 #
112 # Open the output file
113 #
114 if out_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]115 out_file = sys.stdout
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]116 elif type(out_file) == type(''):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]117 fp = open(out_file, 'wb')
118 try:
119 os.path.chmod(out_file, mode)
120 except AttributeError:
121 pass
122 out_file = fp
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]123 #
124 # Main decoding loop
125 #
Guido van Rossum44941011999-01-05 18:02:24[diff] [blame]126 s = in_file.readline()
127 while s and s != 'end\n':
128 try:
129 data = binascii.a2b_uu(s)
130 except binascii.Error, v:
131 # Workaround for broken uuencoders by /Fredrik Lundh
132 nbytes = (((ord(s[0])-32) & 63) * 4 + 5) / 3
133 data = binascii.a2b_uu(s[:nbytes])
134 sys.stderr.write("Warning: %s\n" % str(v))
135 out_file.write(data)
136 s = in_file.readline()
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]137 if not str:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]138 raise Error, 'Truncated input file'
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]139
140def test():
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]141 """uuencode/uudecode main program"""
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]142 import getopt
143
144 dopt = 0
145 topt = 0
146 input = sys.stdin
147 output = sys.stdout
148 ok = 1
149 try:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]150 optlist, args = getopt.getopt(sys.argv[1:], 'dt')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]151 except getopt.error:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]152 ok = 0
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]153 if not ok or len(args) > 2:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]154 print 'Usage:', sys.argv[0], '[-d] [-t] [input [output]]'
155 print ' -d: Decode (in stead of encode)'
156 print ' -t: data is text, encoded format unix-compatible text'
157 sys.exit(1)
158
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]159 for o, a in optlist:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]160 if o == '-d': dopt = 1
161 if o == '-t': topt = 1
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]162
163 if len(args) > 0:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]164 input = args[0]
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]165 if len(args) > 1:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]166 output = args[1]
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]167
168 if dopt:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]169 if topt:
170 if type(output) == type(''):
171 output = open(output, 'w')
172 else:
173 print sys.argv[0], ': cannot do -t to stdout'
174 sys.exit(1)
175 decode(input, output)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]176 else:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]177 if topt:
178 if type(input) == type(''):
179 input = open(input, 'r')
180 else:
181 print sys.argv[0], ': cannot do -t from stdin'
182 sys.exit(1)
183 encode(input, output)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]184
185if __name__ == '__main__':
186 test()