1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * 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 = "from: @(#)tempnam.c 5.1 (Berkeley) 2/22/91";*/ 36 static char *rcsid = "$Id: tempnam.c,v 1.4 1993/08/26 00:47:29 jtc Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/param.h> 40 #include <errno.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <paths.h> 45 46 char * 47 tempnam(dir, pfx) 48 const char *dir, *pfx; 49 { 50 int sverrno; 51 char *f, *name; 52 53 if (!(name = malloc(MAXPATHLEN))) 54 return(NULL); 55 56 if (!pfx) 57 pfx = "tmp."; 58 59 if (f = getenv("TMPDIR")) { 60 (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f, 61 *(f + strlen(f) - 1) == '/'? "": "/", pfx); 62 if (f = mktemp(name)) 63 return(f); 64 } 65 66 if (f = (char *)dir) { 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 f = P_tmpdir; 74 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 75 if (f = mktemp(name)) 76 return(f); 77 78 f = _PATH_TMP; 79 (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx); 80 if (f = mktemp(name)) 81 return(f); 82 83 sverrno = errno; 84 free(name); 85 errno = sverrno; 86 return(NULL); 87 } 88