1 /* $NetBSD: tmpfile.c,v 1.6 1997/07/13 20:15:31 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93"; 43 #else 44 __RCSID("$NetBSD: tmpfile.c,v 1.6 1997/07/13 20:15:31 christos Exp $"); 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 #include <sys/types.h> 49 #include <unistd.h> 50 #include <signal.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <paths.h> 55 56 FILE * 57 tmpfile() 58 { 59 sigset_t set, oset; 60 FILE *fp; 61 int fd, sverrno; 62 #define TRAILER "tmp.XXXXXX" 63 char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)]; 64 65 (void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1); 66 (void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER)); 67 68 sigfillset(&set); 69 (void)sigprocmask(SIG_BLOCK, &set, &oset); 70 71 fd = mkstemp(buf); 72 if (fd != -1) 73 (void)unlink(buf); 74 75 (void)sigprocmask(SIG_SETMASK, &oset, NULL); 76 77 if (fd == -1) 78 return (NULL); 79 80 if ((fp = fdopen(fd, "w+")) == NULL) { 81 sverrno = errno; 82 (void)close(fd); 83 errno = sverrno; 84 return (NULL); 85 } 86 return (fp); 87 } 88