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how to find if the file is a link file, and find the path of the target file (actual file pointed by the link file)
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To find which files link symbolically to a particular file, you can use the find command and the -lname option with a file name, as Listing 13 illustrates.
islink() method in Python is used to check whether the given path represents an existing directory entry that is a symbolic link or not. Note: If symbolic links are not supported by the Python runtime then os. path. islink() method always returns False.
S_ISLNK() macro can be used for to test whether a directory is symbolic link or it can be used to check only whether a file is symbolic link or not.
os.path. realpath (path, *, strict=False) Return the canonical path of the specified filename, eliminating any symbolic links encountered in the path (if they are supported by the operating system). If a path doesn't exist or a symlink loop is encountered, and strict is True , OSError is raised.
os.path.islink (is it a link?) and os.path.realpath (get ultimate pointed to path, regardless of whether it's a link).
If os.path.islink is True, and you only want to follow the first link, use os.readlink.
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