Isn't this pretty close to os.path.realpath()? On Dec 4, 2007 10:46 AM, Giampaolo Rodola' <gnewsg@gmail.com> wrote:
Hi there, I thought it would have been good sharing this code I used in a project of mine. I thought it could eventually look good incorporated in Python stdlib through os or os.path modules. Otherwise I'm merely offering it as a community service to anyone who might be interested.
-- Giampaolo
#!/usr/bin/env python # linkchainresolver.py
import os, sys, errno
def resolvelinkchain(path): """Resolve a chain of symbolic links by returning the absolute path name of the final target.
Raise os.error exception in case of circular link. Do not raise exception if the symlink is broken (pointing to a non-existent path). Return a normalized absolutized version of the pathname if it is not a symbolic link.
Examples:
>>> resolvelinkchain('validlink') /abstarget >>> resolvelinkchain('brokenlink') # resolved anyway /abstarget >>> resolvelinkchain('circularlink') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "module.py", line 19, in resolvelinkchain os.stat(path) OSError: [Errno 40] Too many levels of symbolic links: '3' >>> """ try: os.stat(path) except os.error, err: # do not raise exception in case of broken symlink; # we want to know the final target anyway if err.errno == errno.ENOENT: pass else: raise if not os.path.isabs(path): basedir = os.path.dirname(os.path.abspath(path)) else: basedir = os.path.dirname(path) p = path while os.path.islink(p): p = os.readlink(p) if not os.path.isabs(p): p = os.path.join(basedir, p) basedir = os.path.dirname(p) return os.path.join(basedir, p) _______________________________________________ Python-ideas mailing list Python-ideas@python.org http://mail.python.org/mailman/listinfo/python-ideas
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