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chromium / external / github.com / python / cpython / refs/tags/2.2 / . / Lib / uu.py
blob: 310b3f1b1cab5453e1f1c019d7ae0ce576bab021 [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
Tim Peterse1190062001-01-15 03:34:38[diff] [blame]6# Permission to use, copy, modify, and distribute this software and its
7# documentation for any purpose and without fee is hereby granted,
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]8# provided that the above copyright notice appear in all copies and that
Tim Peterse1190062001-01-15 03:34:38[diff] [blame]9# both that copyright notice and this permission notice appear in
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]10# supporting documentation, and that the name of Lance Ellinghouse
Tim Peterse1190062001-01-15 03:34:38[diff] [blame]11# not be used in advertising or publicity pertaining to distribution
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]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
Guido van Rossumfbba3041998-10-22 16:18:25[diff] [blame]35import sys
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]36from types import StringType
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]37
Skip Montanaro40fc1602001-03-01 04:27:19[diff] [blame]38__all__ = ["Error", "encode", "decode"]
39
Fred Drake9b8d8012000-08-17 04:45:13[diff] [blame]40class Error(Exception):
41 pass
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]42
43def encode(in_file, out_file, name=None, mode=None):
44 """Uuencode file"""
45 #
46 # If in_file is a pathname open it and change defaults
47 #
48 if in_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]49 in_file = sys.stdin
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]50 elif isinstance(in_file, StringType):
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]51 if name is None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]52 name = os.path.basename(in_file)
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]53 if mode is None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]54 try:
55 mode = os.stat(in_file)[0]
56 except AttributeError:
57 pass
58 in_file = open(in_file, 'rb')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]59 #
60 # Open out_file if it is a pathname
61 #
62 if out_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]63 out_file = sys.stdout
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]64 elif isinstance(out_file, StringType):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]65 out_file = open(out_file, 'w')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]66 #
67 # Set defaults for name and mode
68 #
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]69 if name is None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]70 name = '-'
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]71 if mode is None:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]72 mode = 0666
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]73 #
74 # Write the data
75 #
76 out_file.write('begin %o %s\n' % ((mode&0777),name))
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]77 str = in_file.read(45)
78 while len(str) > 0:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]79 out_file.write(binascii.b2a_uu(str))
80 str = in_file.read(45)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]81 out_file.write(' \nend\n')
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]82
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]83
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]84def decode(in_file, out_file=None, mode=None, quiet=0):
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]85 """Decode uuencoded file"""
86 #
87 # Open the input file, if needed.
88 #
89 if in_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]90 in_file = sys.stdin
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]91 elif isinstance(in_file, StringType):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]92 in_file = open(in_file)
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]93 #
Guido van Rossum2ebaa171997-04-08 19:46:02[diff] [blame]94 # Read until a begin is encountered or we've exhausted the file
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]95 #
Guido van Rossum3ccd2f11997-04-08 19:46:53[diff] [blame]96 while 1:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]97 hdr = in_file.readline()
98 if not hdr:
99 raise Error, 'No valid begin line found in input file'
100 if hdr[:5] != 'begin':
101 continue
Guido van Rossum62c11152001-01-10 19:14:28[diff] [blame]102 hdrfields = hdr.split(" ", 2)
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]103 if len(hdrfields) == 3 and hdrfields[0] == 'begin':
104 try:
Guido van Rossum62c11152001-01-10 19:14:28[diff] [blame]105 int(hdrfields[1], 8)
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]106 break
107 except ValueError:
108 pass
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]109 if out_file is None:
Guido van Rossum62c11152001-01-10 19:14:28[diff] [blame]110 out_file = hdrfields[2].rstrip()
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]111 if os.path.exists(out_file):
112 raise Error, 'Cannot overwrite existing file: %s' % out_file
Fred Drake8152d322000-12-12 23:20:45[diff] [blame]113 if mode is None:
Guido van Rossum62c11152001-01-10 19:14:28[diff] [blame]114 mode = int(hdrfields[1], 8)
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]115 #
116 # Open the output file
117 #
Andrew M. Kuchling8cca0b72006-11-19 19:00:04[diff] [blame]118 opened = False
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]119 if out_file == '-':
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]120 out_file = sys.stdout
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]121 elif isinstance(out_file, StringType):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]122 fp = open(out_file, 'wb')
123 try:
124 os.path.chmod(out_file, mode)
125 except AttributeError:
126 pass
127 out_file = fp
Andrew M. Kuchling8cca0b72006-11-19 19:00:04[diff] [blame]128 opened = True
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]129 #
130 # Main decoding loop
131 #
Guido van Rossum44941011999-01-05 18:02:24[diff] [blame]132 s = in_file.readline()
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]133 while s and s.strip() != 'end':
Guido van Rossum44941011999-01-05 18:02:24[diff] [blame]134 try:
135 data = binascii.a2b_uu(s)
136 except binascii.Error, v:
137 # Workaround for broken uuencoders by /Fredrik Lundh
138 nbytes = (((ord(s[0])-32) & 63) * 4 + 5) / 3
139 data = binascii.a2b_uu(s[:nbytes])
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]140 if not quiet:
141 sys.stderr.write("Warning: %s\n" % str(v))
Guido van Rossum44941011999-01-05 18:02:24[diff] [blame]142 out_file.write(data)
143 s = in_file.readline()
Tim Peters79c86712001-07-11 04:08:49[diff] [blame]144 if not s:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]145 raise Error, 'Truncated input file'
Andrew M. Kuchling8cca0b72006-11-19 19:00:04[diff] [blame]146 if opened:
147 out_file.close()
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]148
149def test():
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]150 """uuencode/uudecode main program"""
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]151 import getopt
152
153 dopt = 0
154 topt = 0
155 input = sys.stdin
156 output = sys.stdout
157 ok = 1
158 try:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]159 optlist, args = getopt.getopt(sys.argv[1:], 'dt')
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]160 except getopt.error:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]161 ok = 0
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]162 if not ok or len(args) > 2:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]163 print 'Usage:', sys.argv[0], '[-d] [-t] [input [output]]'
164 print ' -d: Decode (in stead of encode)'
165 print ' -t: data is text, encoded format unix-compatible text'
166 sys.exit(1)
Tim Peterse1190062001-01-15 03:34:38[diff] [blame]167
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]168 for o, a in optlist:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]169 if o == '-d': dopt = 1
170 if o == '-t': topt = 1
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]171
172 if len(args) > 0:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]173 input = args[0]
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]174 if len(args) > 1:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]175 output = args[1]
Jack Jansen8b745121995-08-30 12:19:30[diff] [blame]176
177 if dopt:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]178 if topt:
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]179 if isinstance(output, StringType):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]180 output = open(output, 'w')
181 else:
182 print sys.argv[0], ': cannot do -t to stdout'
183 sys.exit(1)
184 decode(input, output)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]185 else:
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]186 if topt:
Barry Warsaw59dae8a2001-08-17 19:59:34[diff] [blame]187 if isinstance(input, StringType):
Guido van Rossum45e2fbc1998-03-26 21:13:24[diff] [blame]188 input = open(input, 'r')
189 else:
190 print sys.argv[0], ': cannot do -t from stdin'
191 sys.exit(1)
192 encode(input, output)
Guido van Rossum85347411994-09-09 11:10:15[diff] [blame]193
194if __name__ == '__main__':
195 test()