/*-
* Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <libgen.h>
#include <string.h>
char *
(dirname)(char *path)
{
char *end;
/*
* If path is a null pointer or points to an empty string,
* dirname() shall return a pointer to the string ".".
*/
if (path == NULL || *path == '\0')
return (__DECONST(char *, "."));
/* Find end of last pathname component. */
end = path + strlen(path);
while (end > path + 1 && *(end - 1) == '/')
--end;
/* Strip off the last pathname component. */
while (end > path && *(end - 1) != '/')
--end;
/*
* If path does not contain a '/', then dirname() shall return a
* pointer to the string ".".
*/
if (end == path) {
path[0] = '.';
path[1] = '\0';
return (path);
}
/*
* Remove trailing slashes from the resulting directory name. Ensure
* that at least one character remains.
*/
while (end > path + 1 && *(end - 1) == '/')
--end;
/* Null terminate directory name and return it. */
*end = '\0';
return (path);
}
