3 # Copyright 1994 by Lance Ellinghouse
4 # Cathedral City, California Republic, United States of America.
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.
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.
25 # - Arguments more compliant with python standard
27 """Implementation of the UUencode and UUdecode functions.
29 encode(in_file, out_file [,name, mode])
30 decode(in_file [, out_file, mode])
37 __all__
= ["Error", "encode", "decode"]
39 class Error(Exception):
42 def encode(in_file
, out_file
, name
=None, mode
=None):
45 # If in_file is a pathname open it and change defaults
48 in_file
= sys
.stdin
.buffer
49 elif isinstance(in_file
, str):
51 name
= os
.path
.basename(in_file
)
54 mode
= os
.stat(in_file
).st_mode
55 except AttributeError:
57 in_file
= open(in_file
, 'rb')
59 # Open out_file if it is a pathname
62 out_file
= sys
.stdout
.buffer
63 elif isinstance(out_file
, str):
64 out_file
= open(out_file
, 'wb')
66 # Set defaults for name and mode
75 out_file
.write(('begin %o %s\n' % ((mode
& 0o777), name
)).encode("ascii"))
76 data
= in_file
.read(45)
78 out_file
.write(binascii
.b2a_uu(data
))
79 data
= in_file
.read(45)
80 out_file
.write(b
' \nend\n')
83 def decode(in_file
, out_file
=None, mode
=None, quiet
=0):
84 """Decode uuencoded file"""
86 # Open the input file, if needed.
89 in_file
= sys
.stdin
.buffer
90 elif isinstance(in_file
, str):
91 in_file
= open(in_file
, 'rb')
93 # Read until a begin is encountered or we've exhausted the file
96 hdr
= in_file
.readline()
98 raise Error('No valid begin line found in input file')
99 if not hdr
.startswith(b
'begin'):
101 hdrfields
= hdr
.split(b
' ', 2)
102 if len(hdrfields
) == 3 and hdrfields
[0] == b
'begin':
109 # If the filename isn't ASCII, what's up with that?!?
110 out_file
= hdrfields
[2].rstrip(b
' \t\r\n\f').decode("ascii")
111 if os
.path
.exists(out_file
):
112 raise Error('Cannot overwrite existing file: %s' % out_file
)
114 mode
= int(hdrfields
[1], 8)
116 # Open the output file
120 out_file
= sys
.stdout
.buffer
121 elif isinstance(out_file
, str):
122 fp
= open(out_file
, 'wb')
124 os
.path
.chmod(out_file
, mode
)
125 except AttributeError:
132 s
= in_file
.readline()
133 while s
and s
.strip(b
' \t\r\n\f') != b
'end':
135 data
= binascii
.a2b_uu(s
)
136 except binascii
.Error
as v
:
137 # Workaround for broken uuencoders by /Fredrik Lundh
138 nbytes
= (((s
[0]-32) & 63) * 4 + 5) // 3
139 data
= binascii
.a2b_uu(s
[:nbytes
])
141 sys
.stderr
.write("Warning: %s\n" % v
)
143 s
= in_file
.readline()
145 raise Error('Truncated input file')
150 """uuencode/uudecode main program"""
153 parser
= optparse
.OptionParser(usage
='usage: %prog [-d] [-t] [input [output]]')
154 parser
.add_option('-d', '--decode', dest
='decode', help='Decode (instead of encode)?', default
=False, action
='store_true')
155 parser
.add_option('-t', '--text', dest
='text', help='data is text, encoded format unix-compatible text?', default
=False, action
='store_true')
157 (options
, args
) = parser
.parse_args()
159 parser
.error('incorrect number of arguments')
162 # Use the binary streams underlying stdin/stdout
163 input = sys
.stdin
.buffer
164 output
= sys
.stdout
.buffer
172 if isinstance(output
, str):
173 output
= open(output
, 'wb')
175 print(sys
.argv
[0], ': cannot do -t to stdout')
177 decode(input, output
)
180 if isinstance(input, str):
181 input = open(input, 'rb')
183 print(sys
.argv
[0], ': cannot do -t from stdin')
185 encode(input, output
)
187 if __name__
== '__main__':