cpython/Tools/scripts/which.py

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#! /usr/local/python
# 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, os, string
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from stat import *
def msg(str):
sys.stderr.write(str + '\n')
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pathlist = string.splitfields(os.environ['PATH'], ':')
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sts = 0
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longlist = ''
if sys.argv[1:] and sys.argv[1][:2] == '-l':
longlist = sys.argv[1]
del sys.argv[1]
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for prog in sys.argv[1:]:
ident = ()
for dir in pathlist:
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file = os.path.join(dir, prog)
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try:
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st = os.stat(file)
except os.error:
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continue
if not S_ISREG(st[ST_MODE]):
msg(file + ': not a disk file')
else:
mode = S_IMODE(st[ST_MODE])
if mode & 0111:
if not ident:
print file
ident = st[:3]
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else:
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if st[:3] == ident:
s = 'same as: '
else:
s = 'also: '
msg(s + file)
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else:
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msg(file + ': not executable')
if longlist:
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sts = os.system('ls ' + longlist + ' ' + file)
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if sts: msg('"ls -l" exit status: ' + `sts`)
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if not ident:
msg(prog + ': not found')
sts = 1
sys.exit(sts)