1 /* $NetBSD: tempnam.c,v 1.8 1997/07/07 17:47:01 phil Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: tempnam.c,v 1.8 1997/07/07 17:47:01 phil Exp $"; 41 #endif /* LIBC_SCCS and not lint */ 42 43 #include <sys/param.h> 44 #include <errno.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <paths.h> 50 51 extern char *_mktemp __P((char *)); 52 53 __warn_references(tempnam, 54 "warning: tempnam() possibly used unsafely, consider using mkstemp()"); 55 56 char * 57 tempnam(dir, pfx) 58 const char *dir, *pfx; 59 { 60 int sverrno; 61 char *f, *name; 62 63 if (!(name = malloc(MAXPATHLEN))) 64 return(NULL); 65 66 if (!pfx) 67 pfx = "tmp."; 68 69 if (f = getenv("TMPDIR")) { 70 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXX", f, 71 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 72 if (f = _mktemp(name)) 73 return(f); 74 } 75 76 if (f = (char *)dir) { 77 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXX", f, 78 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 79 if (f = _mktemp(name)) 80 return(f); 81 } 82 83 f = P_tmpdir; 84 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXX", f, pfx); 85 if (f = _mktemp(name)) 86 return(f); 87 88 f = _PATH_TMP; 89 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXX", f, pfx); 90 if (f = _mktemp(name)) 91 return(f); 92 93 sverrno = errno; 94 free(name); 95 errno = sverrno; 96 return(NULL); 97 } 98