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which.py
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executable file
·60 lines (50 loc) · 1.6 KB
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#! /usr/bin/env python3
# Variant of "which".
# On stderr, near and total misses are reported.
# '-l<flags>' argument adds ls -l<flags> of each file found.
import sys
if sys.path[0] in (".", ""): del sys.path[0]
import sys, os
from stat import *
def msg(str):
sys.stderr.write(str + '\n')
def main():
pathlist = os.environ['PATH'].split(os.pathsep)
sts = 0
longlist = ''
if sys.argv[1:] and sys.argv[1][:2] == '-l':
longlist = sys.argv[1]
del sys.argv[1]
for prog in sys.argv[1:]:
ident = ()
for dir in pathlist:
filename = os.path.join(dir, prog)
try:
st = os.stat(filename)
except os.error:
continue
if not S_ISREG(st[ST_MODE]):
msg(filename + ': not a disk file')
else:
mode = S_IMODE(st[ST_MODE])
if mode & 0o111:
if not ident:
print(filename)
ident = st[:3]
else:
if st[:3] == ident:
s = 'same as: '
else:
s = 'also: '
msg(s + filename)
else:
msg(filename + ': not executable')
if longlist:
sts = os.system('ls ' + longlist + ' ' + filename)
if sts: msg('"ls -l" exit status: ' + repr(sts))
if not ident:
msg(prog + ': not found')
sts = 1
sys.exit(sts)
if __name__ == '__main__':
main()