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