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/* $OpenBSD: tmpfile.c,v 1.11 2015/08/31 02:53:57 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
FILE *
tmpfile(void)
{
sigset_t set, oset;
FILE *fp;
int fd, sverrno;
#define TRAILER "tmp.XXXXXXXXXX"
char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)];
(void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1);
(void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER));
sigfillset(&set);
(void)sigprocmask(SIG_BLOCK, &set, &oset);
fd = mkstemp(buf);
if (fd != -1) {
mode_t u;
(void)unlink(buf);
u = umask(0);
(void)umask(u);
(void)fchmod(fd, 0666 & ~u);
}
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
if (fd == -1)
return (NULL);
if ((fp = fdopen(fd, "w+")) == NULL) {
sverrno = errno;
(void)close(fd);
errno = sverrno;
return (NULL);
}
return (fp);
}
DEF_STRONG(tmpfile);
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