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 1.2 2003/06/17 04:26:46 dillon 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 __P((char *)); 50 51 char * 52 tempnam(dir, pfx) 53 const char *dir, *pfx; 54 { 55 int sverrno; 56 char *f, *name; 57 58 if (!(name = malloc(MAXPATHLEN))) 59 return(NULL); 60 61 if (!pfx) 62 pfx = "tmp."; 63 64 if (issetugid() == 0 && (f = getenv("TMPDIR"))) { 65 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 66 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 67 if ((f = _mktemp(name))) 68 return(f); 69 } 70 71 if ((f = (char *)dir)) { 72 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 73 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 74 if ((f = _mktemp(name))) 75 return(f); 76 } 77 78 f = P_tmpdir; 79 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 80 if ((f = _mktemp(name))) 81 return(f); 82 83 f = _PATH_TMP; 84 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 85 if ((f = _mktemp(name))) 86 return(f); 87 88 sverrno = errno; 89 free(name); 90 errno = sverrno; 91 return(NULL); 92 } 93