| #! /usr/bin/env python3 | |
| # findlinksto | |
| # | |
| # find symbolic links to a path matching a regular expression | |
| import os | |
| import sys | |
| import re | |
| import getopt | |
| def main(): | |
| try: | |
| opts, args = getopt.getopt(sys.argv[1:], '') | |
| if len(args) < 2: | |
| raise getopt.GetoptError('not enough arguments', None) | |
| except getopt.GetoptError as msg: | |
| sys.stdout = sys.stderr | |
| print(msg) | |
| print('usage: findlinksto pattern directory ...') | |
| sys.exit(2) | |
| pat, dirs = args[0], args[1:] | |
| prog = re.compile(pat) | |
| for dirname in dirs: | |
| os.walk(dirname, visit, prog) | |
| def visit(prog, dirname, names): | |
| if os.path.islink(dirname): | |
| names[:] = [] | |
| return | |
| if os.path.ismount(dirname): | |
| print('descend into', dirname) | |
| for name in names: | |
| name = os.path.join(dirname, name) | |
| try: | |
| linkto = os.readlink(name) | |
| if prog.search(linkto) is not None: | |
| print(name, '->', linkto) | |
| except OSError: | |
| pass | |
| if __name__ == '__main__': | |
| main() | |