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 * 4. 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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <errno.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <paths.h> 43 44 __warn_references(tempnam, 45 "warning: tempnam() possibly used unsafely; consider using mkstemp()"); 46 47 extern char *_mktemp(char *); 48 49 char * 50 tempnam(dir, pfx) 51 const char *dir, *pfx; 52 { 53 int sverrno; 54 char *f, *name; 55 56 if (!(name = malloc(MAXPATHLEN))) 57 return(NULL); 58 59 if (!pfx) 60 pfx = "tmp."; 61 62 if (issetugid() == 0 && (f = getenv("TMPDIR"))) { 63 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 64 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 65 if ((f = _mktemp(name))) 66 return(f); 67 } 68 69 if ((f = (char *)dir)) { 70 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 71 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 72 if ((f = _mktemp(name))) 73 return(f); 74 } 75 76 f = P_tmpdir; 77 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 78 if ((f = _mktemp(name))) 79 return(f); 80 81 f = _PATH_TMP; 82 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 83 if ((f = _mktemp(name))) 84 return(f); 85 86 sverrno = errno; 87 free(name); 88 errno = sverrno; 89 return(NULL); 90 } 91