tmpfile.c revision 71579
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. 161573Srgrimes * 3. All advertising materials mentioning features or use of this software 171573Srgrimes * must display the following acknowledgement: 181573Srgrimes * This product includes software developed by the University of 191573Srgrimes * California, Berkeley and its contributors. 201573Srgrimes * 4. Neither the name of the University nor the names of its contributors 211573Srgrimes * may be used to endorse or promote products derived from this software 221573Srgrimes * without specific prior written permission. 231573Srgrimes * 241573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341573Srgrimes * SUCH DAMAGE. 3555837Sjasone * 3655837Sjasone * $FreeBSD: head/lib/libc/stdio/tmpfile.c 71579 2001-01-24 13:01:12Z deischen $ 371573Srgrimes */ 381573Srgrimes 391573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 401573Srgrimesstatic char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93"; 411573Srgrimes#endif /* LIBC_SCCS and not lint */ 421573Srgrimes 4371579Sdeischen#include "namespace.h" 441573Srgrimes#include <sys/types.h> 451573Srgrimes#include <signal.h> 461573Srgrimes#include <unistd.h> 471573Srgrimes#include <errno.h> 481573Srgrimes#include <stdio.h> 4934380Sjb#include <string.h> 501573Srgrimes#include <paths.h> 5171579Sdeischen#include "un-namespace.h" 521573Srgrimes 531573SrgrimesFILE * 541573Srgrimestmpfile() 551573Srgrimes{ 561573Srgrimes sigset_t set, oset; 571573Srgrimes FILE *fp; 581573Srgrimes int fd, sverrno; 591573Srgrimes#define TRAILER "tmp.XXXXXX" 601573Srgrimes char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)]; 611573Srgrimes 621573Srgrimes (void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1); 631573Srgrimes (void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER)); 641573Srgrimes 651573Srgrimes sigfillset(&set); 6671579Sdeischen (void)_sigprocmask(SIG_BLOCK, &set, &oset); 671573Srgrimes 681573Srgrimes fd = mkstemp(buf); 691573Srgrimes if (fd != -1) 701573Srgrimes (void)unlink(buf); 711573Srgrimes 7271579Sdeischen (void)_sigprocmask(SIG_SETMASK, &oset, NULL); 731573Srgrimes 741573Srgrimes if (fd == -1) 751573Srgrimes return (NULL); 761573Srgrimes 771573Srgrimes if ((fp = fdopen(fd, "w+")) == NULL) { 781573Srgrimes sverrno = errno; 7956698Sjasone (void)_close(fd); 801573Srgrimes errno = sverrno; 811573Srgrimes return (NULL); 821573Srgrimes } 831573Srgrimes return (fp); 841573Srgrimes} 85