which.py

#! /usr/bin/env python

# Variant of "which".
# On stderr, near and total misses are reported.
# '-l<flags>' argument adds ls -l<flags> of each file found.

importsys
ifsys.path[0] in (".", ""): delsys.path[0]

importsys, os
fromstatimport*

defmsg(str):
sys.stderr.write(str+'\n')

defmain():
pathlist=os.environ['PATH'].split(os.pathsep)

sts=0
longlist=''

ifsys.argv[1:] andsys.argv[1][:2] =='-l':
longlist=sys.argv[1]
delsys.argv[1]

forproginsys.argv[1:]:
ident= ()
fordirinpathlist:
filename=os.path.join(dir, prog)
try:
st=os.stat(filename)
exceptos.error:
continue
ifnotS_ISREG(st[ST_MODE]):
msg(filename+': not a disk file')
else:
mode=S_IMODE(st[ST_MODE])
ifmode&0111:
ifnotident:
printfilename
ident=st[:3]
else:
ifst[:3] ==ident:
s='same as: '
else:
s='also: '
msg(s+filename)
else:
msg(filename+': not executable')
iflonglist:
sts=os.system('ls '+longlist+' '+filename)
ifsts: msg('"ls -l" exit status: '+repr(sts))
ifnotident:
msg(prog+': not found')
sts=1

sys.exit(sts)

if__name__=='__main__':
main()