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 regex
  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.error, 'not enough arguments'
  17         except getopt.error, 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 = regex.compile(pat)
  24         for dirname in dirs:
  25                 os.path.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) >= 0:
  38                                 print name, '->', linkto
  39                 except os.error:
  40                         pass
  41
  42 main()