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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tempnam.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/stdio/tempnam.c,v 1.11 2007/01/09 00:28:07 imp Exp $ 31 * $DragonFly: src/lib/libc/stdio/tempnam.c,v 1.5 2005/11/20 11:07:30 swildner Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <paths.h> 41 42 __warn_references(tempnam, 43 "warning: tempnam() possibly used unsafely; consider using mkstemp()"); 44 45 extern char *_mktemp(char *); 46 47 char * 48 tempnam(const char *dir, const char *pfx) 49 { 50 int sverrno; 51 char *f, *name; 52 53 if (!(name = malloc(MAXPATHLEN))) 54 return(NULL); 55 56 if (!pfx) 57 pfx = "tmp."; 58 59 if (issetugid() == 0 && (f = getenv("TMPDIR"))) { 60 snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 61 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 62 if ((f = _mktemp(name))) 63 return(f); 64 } 65 66 if ((f = (char *)dir)) { 67 snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 68 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 69 if ((f = _mktemp(name))) 70 return(f); 71 } 72 73 f = P_tmpdir; 74 snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 75 if ((f = _mktemp(name))) 76 return(f); 77 78 f = _PATH_TMP; 79 snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 80 if ((f = _mktemp(name))) 81 return(f); 82 83 sverrno = errno; 84 free(name); 85 errno = sverrno; 86 return(NULL); 87 } 88