Tools/scripts/which.py

   1 #! /usr/bin/env python
   2
   3 # Variant of "which".
   4 # On stderr, near and total misses are reported.
   5 # '-l<flags>' argument adds ls -l<flags> of each file found.
   6
   7 import sys
   8 if sys.path[0] in (".", ""): del sys.path[0]
   9
  10 import sys, os
  11 from stat import *
  12
  13 def msg(str):
  14     sys.stderr.write(str + '\n')
  15
  16 def main():
  17     pathlist = os.environ['PATH'].split(os.pathsep)
  18
  19     sts = 0
  20     longlist = ''
  21
  22     if sys.argv[1:] and sys.argv[1][:2] == '-l':
  23         longlist = sys.argv[1]
  24         del sys.argv[1]
  25
  26     for prog in sys.argv[1:]:
  27         ident = ()
  28         for dir in pathlist:
  29             filename = os.path.join(dir, prog)
  30             try:
  31                 st = os.stat(filename)
  32             except os.error:
  33                 continue
  34             if not S_ISREG(st[ST_MODE]):
  35                 msg(filename + ': not a disk file')
  36             else:
  37                 mode = S_IMODE(st[ST_MODE])
  38                 if mode & 0111:
  39                     if not ident:
  40                         print filename
  41                         ident = st[:3]
  42                     else:
  43                         if st[:3] == ident:
  44                             s = 'same as: '
  45                         else:
  46                             s = 'also: '
  47                         msg(s + filename)
  48                 else:
  49                     msg(filename + ': not executable')
  50             if longlist:
  51                 sts = os.system('ls ' + longlist + ' ' + filename)
  52                 if sts: msg('"ls -l" exit status: ' + repr(sts))
  53         if not ident:
  54             msg(prog + ': not found')
  55             sts = 1
  56
  57     sys.exit(sts)
  58
  59 if __name__ == '__main__':
  60     main()