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/* $OpenBSD: getcwd.c,v 1.21 2016/05/07 19:48:00 guenther Exp $ */
/*
* Copyright (c) 2005 Marius Eriksen <marius@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <unistd.h>
int __getcwd(char *buf, size_t len);
PROTO_NORMAL(__getcwd);
char *
getcwd(char *buf, size_t size)
{
char *allocated = NULL;
if (buf != NULL && size == 0) {
errno = EINVAL;
return (NULL);
}
if (buf == NULL &&
(allocated = buf = malloc(size = PATH_MAX)) == NULL)
return (NULL);
if (__getcwd(buf, size) == -1) {
free(allocated);
return (NULL);
}
return (buf);
}
DEF_WEAK(getcwd);
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