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#! /usr/bin/env python2.4
# 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 from types import StringType
__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 # if in_file == '-': in_file = sys.stdin elif isinstance(in_file, StringType): 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') # # Open out_file if it is a pathname # if out_file == '-': out_file = sys.stdout elif isinstance(out_file, StringType): out_file = open(out_file, 'w') # # 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)) str = in_file.read(45) while len(str) > 0: out_file.write(binascii.b2a_uu(str)) str = in_file.read(45) out_file.write(' \nend\n')
def decode(in_file, out_file=None, mode=None, quiet=0): """Decode uuencoded file""" # # Open the input file, if needed. # if in_file == '-': in_file = sys.stdin elif isinstance(in_file, StringType): in_file = open(in_file) # # Read until a begin is encountered or we've exhausted the file # while 1: hdr = in_file.readline() if not hdr: raise Error, 'No valid begin line found in input file' if hdr[:5] != '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, StringType): fp = open(out_file, 'wb') try: os.path.chmod(out_file, mode) except AttributeError: pass out_file = fp # # 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" % str(v)) out_file.write(data) s = in_file.readline() if not s: raise Error, 'Truncated input file'
def test(): """uuencode/uudecode main program""" import getopt
dopt = 0 topt = 0 input = sys.stdin output = sys.stdout ok = 1 try: optlist, args = getopt.getopt(sys.argv[1:], 'dt') except getopt.error: ok = 0 if not ok or len(args) > 2: print 'Usage:', sys.argv[0], '[-d] [-t] [input [output]]' print ' -d: Decode (in stead of encode)' print ' -t: data is text, encoded format unix-compatible text' sys.exit(1)
for o, a in optlist: if o == '-d': dopt = 1 if o == '-t': topt = 1
if len(args) > 0: input = args[0] if len(args) > 1: output = args[1]
if dopt: if topt: if isinstance(output, StringType): output = open(output, 'w') else: print sys.argv[0], ': cannot do -t to stdout' sys.exit(1) decode(input, output) else: if topt: if isinstance(input, StringType): input = open(input, 'r') else: print sys.argv[0], ': cannot do -t from stdin' sys.exit(1) encode(input, output)
if __name__ == '__main__': test()
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