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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
CANONICALIZE_FILE_NAME(3) Linux Programmer's ManualCANONICALIZE_FILE_NAME(3)
canonicalize_file_name - return the canonicalized absolute pathname
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
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 call:
realpath(path, NULL);
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.
See realpath(3).
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├─────────────────────────┼───────────────┼─────────┤
│canonicalize_file_name() │ Thread safety │ MT-Safe │
└─────────────────────────┴───────────────┴─────────┘
This function is a GNU extension.
readlink(2), realpath(3)
This page is part of release 4.12 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2015-03-02 CANONICALIZE_FILE_NAME(3)
Pages that refer to this page: realpath(3)