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You are here: manpages





CANONICALIZE_FILE_NAME

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02
Index Return to Main Contents
 

NAME

canonicalize_file_name - return the canonicalized absolute pathname  

SYNOPSIS

#define _GNU_SOURCE /* See feature_test_macros(7) */
#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 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).
InterfaceAttributeValue
canonicalize_file_name() Thread safetyMT-Safe
 

CONFORMING TO

This function is a GNU extension.  

SEE ALSO

readlink(2), realpath(3)  

COLOPHON

This page is part of release 3.81 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 http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON


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