NAME
canonicalize_file_name - return the canonicalized absolute pathname
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#define _GNU_SOURCE\n /* See feature_test_macros(7) */
\n#include <stdlib.h>char *canonicalize_file_name(const char *\npath\n);DESCRIPTION
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 call:
realpath(path, NULL);RETURN VALUE
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.
ERRORS
See realpath(3).
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| canonicalize_file_name () | Thread safety | MT-Safe |
STANDARDS
GNU.
SEE ALSO
readlink(2), realpath(3)