cpython/Tools/scripts/which.py

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#! /usr/bin/env python
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# Variant of "which".
# On stderr, near and total misses are reported.
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# '-l<flags>' argument adds ls -l<flags> of each file found.
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import sys
if sys.path[0] in (".", ""): del sys.path[0]
import sys, os
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from stat import *
def msg(str):
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sys.stderr.write(str + '\n')
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pathlist = os.environ['PATH'].split(os.pathsep)
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sts = 0
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longlist = ''
if sys.argv[1:] and sys.argv[1][:2] == '-l':
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longlist = sys.argv[1]
del sys.argv[1]
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for prog in sys.argv[1:]:
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ident = ()
for dir in pathlist:
filename = os.path.join(dir, prog)
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try:
st = os.stat(filename)
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except os.error:
continue
if not S_ISREG(st[ST_MODE]):
msg(filename + ': not a disk file')
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else:
mode = S_IMODE(st[ST_MODE])
if mode & 0111:
if not ident:
print filename
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ident = st[:3]
else:
if st[:3] == ident:
s = 'same as: '
else:
s = 'also: '
msg(s + filename)
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else:
msg(filename + ': not executable')
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if longlist:
sts = os.system('ls ' + longlist + ' ' + filename)
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if sts: msg('"ls -l" exit status: ' + `sts`)
if not ident:
msg(prog + ': not found')
sts = 1
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sys.exit(sts)