11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Chris Torek. 71573Srgrimes * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 16249808Semaste * 3. Neither the name of the University nor the names of its contributors 171573Srgrimes * may be used to endorse or promote products derived from this software 181573Srgrimes * without specific prior written permission. 191573Srgrimes * 201573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301573Srgrimes * SUCH DAMAGE. 311573Srgrimes */ 321573Srgrimes 331573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 341573Srgrimesstatic char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93"; 351573Srgrimes#endif /* LIBC_SCCS and not lint */ 3692986Sobrien#include <sys/cdefs.h> 3792986Sobrien__FBSDID("$FreeBSD$"); 381573Srgrimes 3971579Sdeischen#include "namespace.h" 401573Srgrimes#include <sys/types.h> 411573Srgrimes#include <signal.h> 421573Srgrimes#include <unistd.h> 431573Srgrimes#include <errno.h> 441573Srgrimes#include <stdio.h> 4579379Smikeh#include <stdlib.h> 4634380Sjb#include <string.h> 471573Srgrimes#include <paths.h> 4871579Sdeischen#include "un-namespace.h" 49287292Skib#include "libc_private.h" 501573Srgrimes 511573SrgrimesFILE * 52287292Skibtmpfile(void) 531573Srgrimes{ 541573Srgrimes sigset_t set, oset; 551573Srgrimes FILE *fp; 561573Srgrimes int fd, sverrno; 571573Srgrimes#define TRAILER "tmp.XXXXXX" 5879379Smikeh char *buf; 5979379Smikeh const char *tmpdir; 601573Srgrimes 61110429Smtm tmpdir = NULL; 62105037Skris if (issetugid() == 0) 63105037Skris tmpdir = getenv("TMPDIR"); 6479379Smikeh if (tmpdir == NULL) 6579379Smikeh tmpdir = _PATH_TMP; 661573Srgrimes 6779379Smikeh (void)asprintf(&buf, "%s%s%s", tmpdir, 6879379Smikeh (tmpdir[strlen(tmpdir) - 1] == '/') ? "" : "/", TRAILER); 6979379Smikeh if (buf == NULL) 7079379Smikeh return (NULL); 7179379Smikeh 721573Srgrimes sigfillset(&set); 73287292Skib (void)__libc_sigprocmask(SIG_BLOCK, &set, &oset); 741573Srgrimes 751573Srgrimes fd = mkstemp(buf); 761573Srgrimes if (fd != -1) 771573Srgrimes (void)unlink(buf); 781573Srgrimes 7979379Smikeh free(buf); 8079379Smikeh 81287292Skib (void)__libc_sigprocmask(SIG_SETMASK, &oset, NULL); 821573Srgrimes 831573Srgrimes if (fd == -1) 841573Srgrimes return (NULL); 851573Srgrimes 861573Srgrimes if ((fp = fdopen(fd, "w+")) == NULL) { 871573Srgrimes sverrno = errno; 8856698Sjasone (void)_close(fd); 891573Srgrimes errno = sverrno; 901573Srgrimes return (NULL); 911573Srgrimes } 921573Srgrimes return (fp); 931573Srgrimes} 94