1 /* $NetBSD: tempnam.c,v 1.16 2003/01/18 11:29:58 thorpej 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: tempnam.c,v 1.16 2003/01/18 11:29:58 thorpej Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #include <errno.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <paths.h> 53 #include "reentrant.h" 54 #include "local.h" 55 56 __warn_references(tempnam, 57 "warning: tempnam() possibly used unsafely, use mkstemp() or mkdtemp()") 58 59 char * 60 tempnam(dir, pfx) 61 const char *dir, *pfx; 62 { 63 int sverrno; 64 char *f, *name; 65 66 if (!(name = malloc((size_t)MAXPATHLEN))) 67 return(NULL); 68 69 if (!pfx) 70 pfx = "tmp."; 71 72 if ((f = getenv("TMPDIR")) != NULL) { 73 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, 74 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 75 if ((f = _mktemp(name)) != NULL) 76 return(f); 77 } 78 79 if ((/* LINTED */f = (char *)dir) != NULL) { 80 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, 81 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 82 if ((f = _mktemp(name)) != NULL) 83 return(f); 84 } 85 86 f = P_tmpdir; 87 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%sXXXXXXXXXX", f, pfx); 88 if ((f = _mktemp(name)) != NULL) 89 return(f); 90 91 f = _PATH_TMP; 92 (void)snprintf(name, (size_t)MAXPATHLEN, "%s%sXXXXXXXXXX", f, pfx); 93 if ((f = _mktemp(name)) != NULL) 94 return(f); 95 96 sverrno = errno; 97 free(name); 98 errno = sverrno; 99 return(NULL); 100 } 101