72 lines
1.6 KiB
Python
72 lines
1.6 KiB
Python
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# Extract files from a SHAR archive.
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# Run this on the Mac.
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# Usage:
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# >>> import unshar
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# >>> f = open('SHAR')
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# >>> unshar.unshar(f)
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import string
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def unshar(fp, verbose=0, overwrite=0):
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ofp = None
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file = None
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while 1:
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line = fp.readline()
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if verbose > 3: print 'Got:', `line`
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if line[:1] == 'X':
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# Most common case first
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if ofp: ofp.write(line[1:])
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continue
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if not line:
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if verbose: print 'EOF'
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if ofp:
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print 'Unterminated file -- closing'
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ofp.close()
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ofp = None
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break
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if line[0] == '#':
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if verbose: print line,
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continue
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if line[:14] == 'sed "s/^X//" >':
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if verbose: print "!!!", `line`
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i = string.find(line, "'")
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j = string.find(line, "'", i+1)
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if i >= 0 and j > i:
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file = line[i+1:j]
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if '/' in file:
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words = string.splitfields(file, '/')
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for funny in '', '.':
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while funny in words: words.remove(funny)
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for i in range(len(words)):
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if words[i] == '..': words[i] = ''
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words.insert(0, '')
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file = string.joinfields(words, ':')
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try:
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ofp = open(file, 'r')
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ofp.close()
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ofp = None
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over = 1
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except IOError:
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over = 0
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if over and not overwrite:
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print 'Skipping', file, '(already exists) ...'
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continue
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ofp = open(file, 'w')
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if over:
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print 'Overwriting', file, '...'
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else:
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print 'Writing', file, '...'
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continue
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if line == 'END_OF_FILE\n':
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if not file:
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print 'Unexpected END_OF_FILE marker'
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if ofp:
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print 'done'
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ofp.close()
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ofp = None
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else:
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print 'done skipping'
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file = None
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continue
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if verbose: print "...", `line`
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