canonicalize_file_name - return the canonicalized absolute pathname
#define _GNU_SOURCE /* See feature_test_macros(7) */
char *canonicalize_file_name(const char *path);
The canonicalize_file_name() function returns a null-terminated string
containing the canonicalized absolute pathname corresponding to path.
In the returned string, symbolic links are resolved, as are . and
.. pathname components. Consecutive slash (/) characters are
replaced by a single slash.
The returned string is dynamically allocated by
canonicalize_file_name() and the caller should deallocate it with
free(3) when it is no longer required.
The call canonicalize_file_name(path) is equivalent to the
On success, canonicalize_file_name() returns a null-terminated string. On
error (e.g., a pathname component is unreadable or does not exist),
canonicalize_file_name() returns NULL and sets errno to indicate
For an explanation of the terms used in this section, see attributes(7).
This function is a GNU extension.
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