1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tempnam.c 8.1 (Berkeley) 6/4/93 34 * $FreeBSD: src/lib/libc/stdio/tempnam.c,v 1.8 1999/10/24 11:57:24 ache Exp $ 35 * $DragonFly: src/lib/libc/stdio/tempnam.c,v 1.4 2004/06/07 20:35:41 hmp Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <paths.h> 45 46 __warn_references(tempnam, 47 "warning: tempnam() possibly used unsafely; consider using mkstemp()"); 48 49 extern char *_mktemp (char *); 50 51 char * 52 tempnam(const char *dir, const char *pfx) 53 { 54 int sverrno; 55 char *f, *name; 56 57 if (!(name = malloc(MAXPATHLEN))) 58 return(NULL); 59 60 if (!pfx) 61 pfx = "tmp."; 62 63 if (issetugid() == 0 && (f = getenv("TMPDIR"))) { 64 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 65 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 66 if ((f = _mktemp(name))) 67 return(f); 68 } 69 70 if ((f = (char *)dir)) { 71 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 72 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 73 if ((f = _mktemp(name))) 74 return(f); 75 } 76 77 f = P_tmpdir; 78 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 79 if ((f = _mktemp(name))) 80 return(f); 81 82 f = _PATH_TMP; 83 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 84 if ((f = _mktemp(name))) 85 return(f); 86 87 sverrno = errno; 88 free(name); 89 errno = sverrno; 90 return(NULL); 91 } 92