1  #! /usr/bin/env python3
       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 OSError:
      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 & 0o111:
      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                  sts = os.waitstatus_to_exitcode(sts)
      53                  if sts: msg('"ls -l" exit status: ' + repr(sts))
      54          if not ident:
      55              msg(prog + ': not found')
      56              sts = 1
      57  
      58      sys.exit(sts)
      59  
      60  if __name__ == '__main__':
      61      main()