1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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/param.h> 33 #include <errno.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 #include <paths.h> 39 40 __warn_references(tempnam, 41 "warning: tempnam() possibly used unsafely; consider using mkstemp()"); 42 43 extern char *_mktemp(char *); 44 45 char * 46 tempnam(const char *dir, const char *pfx) 47 { 48 int sverrno; 49 char *f, *name; 50 51 if (!(name = malloc(MAXPATHLEN))) 52 return(NULL); 53 54 if (!pfx) 55 pfx = "tmp."; 56 57 if ((f = secure_getenv("TMPDIR")) != NULL) { 58 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 59 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 60 if ((f = _mktemp(name))) 61 return(f); 62 } 63 64 if ((f = (char *)dir)) { 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 f = P_tmpdir; 72 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 73 if ((f = _mktemp(name))) 74 return(f); 75 76 f = _PATH_TMP; 77 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 78 if ((f = _mktemp(name))) 79 return(f); 80 81 sverrno = errno; 82 free(name); 83 errno = sverrno; 84 return(NULL); 85 } 86