Name
canonicalize_file_name - return the canonicalized absolute pathnameLibrary
Standard C library ( libc ", " -lc )Synopsis
"#define(7)_GNU_SOURCE" " /* See feature_test_macros */" #include <stdlib.h> char *canonicalize_file_name(const char *" path ");
Description
The canonicalize_file_name() function returns a null-terminated string containing the canonicalized absolute pathname corresponding topath. 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 |
| T} | Thread safety | MT-Safe |