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