From a5ad73efb6b08c9e6d3726adfe25bf6ec0fd3850 Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Mon, 17 Sep 2001 15:16:09 +0000 Subject: SF patch #461781 by Chris Lawrence: os.path.realpath - Resolve symlinks: Once upon a time, I put together a little function that tries to find the canonical filename for a given pathname on POSIX. I've finally gotten around to turning it into a proper patch with documentation. On non-POSIX, I made it an alias for 'abspath', as that's the behavior on POSIX when no symlinks are encountered in the path. Example: >>> os.path.realpath('/usr/bin/X11/X') '/usr/X11R6/bin/X' --- Lib/posixpath.py | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'Lib/posixpath.py') diff --git a/Lib/posixpath.py b/Lib/posixpath.py index 6bf40f8336..0f6b6a76db 100644 --- a/Lib/posixpath.py +++ b/Lib/posixpath.py @@ -379,3 +379,24 @@ def abspath(path): if not isabs(path): path = join(os.getcwd(), path) return normpath(path) + + +# Return a canonical path (i.e. the absolute location of a file on the +# filesystem). + +def realpath(filename): + """Return the canonical path of the specified filename, eliminating any +symbolic links encountered in the path.""" + filename = abspath(filename) + + bits = ['/'] + filename.split('/')[1:] + for i in range(2, len(bits)+1): + component = join(*bits[0:i]) + if islink(component): + resolved = os.readlink(component) + (dir, file) = split(component) + resolved = normpath(join(dir, resolved)) + newpath = join(*([resolved] + bits[i:])) + return realpath(newpath) + + return filename -- cgit v1.2.1