Tools/scripts/findlinksto.py

   1 #! /usr/bin/env python
   2
   3 # findlinksto
   4 #
   5 # find symbolic links to a path matching a regular expression
   6
   7 import os
   8 import sys
   9 import re
  10 import getopt
  11
  12 def main():
  13     try:
  14         opts, args = getopt.getopt(sys.argv[1:], '')
  15         if len(args) < 2:
  16             raise getopt.GetoptError('not enough arguments', None)
  17     except getopt.GetoptError as msg:
  18         sys.stdout = sys.stderr
  19         print(msg)
  20         print('usage: findlinksto pattern directory ...')
  21         sys.exit(2)
  22     pat, dirs = args[0], args[1:]
  23     prog = re.compile(pat)
  24     for dirname in dirs:
  25         os.walk(dirname, visit, prog)
  26
  27 def visit(prog, dirname, names):
  28     if os.path.islink(dirname):
  29         names[:] = []
  30         return
  31     if os.path.ismount(dirname):
  32         print('descend into', dirname)
  33     for name in names:
  34         name = os.path.join(dirname, name)
  35         try:
  36             linkto = os.readlink(name)
  37             if prog.search(linkto) is not None:
  38                 print(name, '->', linkto)
  39         except os.error:
  40             pass
  41
  42 if __name__ == '__main__':
  43     main()