mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* $Id: compat_mkdtemp.c,v 1.4 2021/09/19 15:02:55 schwarze Exp $ */
|
|
/*
|
|
* Copyright (c) 2015, 2021 Ingo Schwarze <schwarze@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.
|
|
*
|
|
* The algorithm of this function is inspired by OpenBSD mkdtemp(3)
|
|
* by Theo de Raadt and Todd Miller, but the code differs.
|
|
*/
|
|
#include "config.h"
|
|
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
char *
|
|
mkdtemp(char *path)
|
|
{
|
|
char *start, *cp;
|
|
unsigned int tries;
|
|
|
|
start = strchr(path, '\0');
|
|
while (start > path && start[-1] == 'X')
|
|
start--;
|
|
|
|
for (tries = INT_MAX; tries; tries--) {
|
|
if (mktemp(path) == NULL)
|
|
return NULL;
|
|
if (mkdir(path, S_IRUSR | S_IWUSR | S_IXUSR) == 0)
|
|
return path;
|
|
for (cp = start; *cp != '\0'; cp++)
|
|
*cp = 'X';
|
|
if (errno != EEXIST)
|
|
return NULL;
|
|
}
|
|
errno = EEXIST;
|
|
return NULL;
|
|
}
|