1 /* $NetBSD: tmpfile.c,v 1.5 1995/02/02 02:10:43 jtc 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 #if defined(LIBC_SCCS) && !defined(lint) 40 #if 0 41 static char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93"; 42 #endif 43 static char rcsid[] = "$NetBSD: tmpfile.c,v 1.5 1995/02/02 02:10:43 jtc Exp $"; 44 #endif /* LIBC_SCCS and not lint */ 45 46 #include <sys/types.h> 47 #include <unistd.h> 48 #include <signal.h> 49 #include <errno.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <paths.h> 53 54 FILE * 55 tmpfile() 56 { 57 sigset_t set, oset; 58 FILE *fp; 59 int fd, sverrno; 60 #define TRAILER "tmp.XXXXXX" 61 char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)]; 62 63 (void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1); 64 (void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER)); 65 66 sigfillset(&set); 67 (void)sigprocmask(SIG_BLOCK, &set, &oset); 68 69 fd = mkstemp(buf); 70 if (fd != -1) 71 (void)unlink(buf); 72 73 (void)sigprocmask(SIG_SETMASK, &oset, NULL); 74 75 if (fd == -1) 76 return (NULL); 77 78 if ((fp = fdopen(fd, "w+")) == NULL) { 79 sverrno = errno; 80 (void)close(fd); 81 errno = sverrno; 82 return (NULL); 83 } 84 return (fp); 85 } 86