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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include <paths.h> 47 48 __warn_references(tempnam, 49 "warning: tempnam() possibly used unsafely; consider using mkstemp()"); 50 51 extern char *_mktemp(char *); 52 53 char * 54 tempnam(dir, pfx) 55 const char *dir, *pfx; 56 { 57 int sverrno; 58 char *f, *name; 59 60 if (!(name = malloc(MAXPATHLEN))) 61 return(NULL); 62 63 if (!pfx) 64 pfx = "tmp."; 65 66 if (issetugid() == 0 && (f = getenv("TMPDIR"))) { 67 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 68 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 69 if ((f = _mktemp(name))) 70 return(f); 71 } 72 73 if ((f = (char *)dir)) { 74 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 75 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 76 if ((f = _mktemp(name))) 77 return(f); 78 } 79 80 f = P_tmpdir; 81 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 82 if ((f = _mktemp(name))) 83 return(f); 84 85 f = _PATH_TMP; 86 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 87 if ((f = _mktemp(name))) 88 return(f); 89 90 sverrno = errno; 91 free(name); 92 errno = sverrno; 93 return(NULL); 94 } 95