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