1 /* $NetBSD: tempnam.c,v 1.6 1995/02/02 02:10:42 jtc 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 1.6 1995/02/02 02:10:42 jtc 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 char * 52 tempnam(dir, pfx) 53 const char *dir, *pfx; 54 { 55 int sverrno; 56 char *f, *name; 57 58 if (!(name = malloc(MAXPATHLEN))) 59 return(NULL); 60 61 if (!pfx) 62 pfx = "tmp."; 63 64 if (f = getenv("TMPDIR")) { 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 if (f = (char *)dir) { 72 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 73 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 74 if (f = mktemp(name)) 75 return(f); 76 } 77 78 f = P_tmpdir; 79 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 80 if (f = mktemp(name)) 81 return(f); 82 83 f = _PATH_TMP; 84 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 85 if (f = mktemp(name)) 86 return(f); 87 88 sverrno = errno; 89 free(name); 90 errno = sverrno; 91 return(NULL); 92 } 93