1 /* $NetBSD: tempnam.c,v 1.17 2003/08/07 16:43:33 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: tempnam.c,v 1.17 2003/08/07 16:43:33 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/param.h> 43 #include <errno.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 #include <paths.h> 49 #include "reentrant.h" 50 #include "local.h" 51 52 __warn_references(tempnam, 53 "warning: tempnam() possibly used unsafely, use mkstemp() or mkdtemp()") 54 55 char * 56 tempnam(dir, pfx) 57 const char *dir, *pfx; 58 { 59 int sverrno; 60 char *f, *name; 61 62 if (!(name = malloc((size_t)MAXPATHLEN))) 63 return(NULL); 64 65 if (!pfx) 66 pfx = "tmp."; 67 68 if ((f = getenv("TMPDIR")) != NULL) { 69 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, 70 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 71 if ((f = _mktemp(name)) != NULL) 72 return(f); 73 } 74 75 if ((/* LINTED */f = (char *)dir) != NULL) { 76 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, 77 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 78 if ((f = _mktemp(name)) != NULL) 79 return(f); 80 } 81 82 f = P_tmpdir; 83 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%sXXXXXXXXXX", f, pfx); 84 if ((f = _mktemp(name)) != NULL) 85 return(f); 86 87 f = _PATH_TMP; 88 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%sXXXXXXXXXX", f, pfx); 89 if ((f = _mktemp(name)) != NULL) 90 return(f); 91 92 sverrno = errno; 93 free(name); 94 errno = sverrno; 95 return(NULL); 96 } 97