canonicalize_file_name - return the canonicalized absolute pathname
#define _GNU_SOURCE /* See feature_test_macros(7)
char *canonicalize_file_name(const char
The canonicalize_file_name() function returns a
null-terminated string containing the canonicalized absolute pathname
path. In the returned string, symbolic links
are resolved, as are
.. pathname components.
Consecutive slash (
/) characters are replaced by a single
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.
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 the error.
For an explanation of the terms used in this section, see attributes(7).
This function is a GNU extension.
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