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tempnam.c revision 1.1
      1  1.1  cgd /*
      2  1.1  cgd  * Copyright (c) 1988 Regents of the University of California.
      3  1.1  cgd  * All rights reserved.
      4  1.1  cgd  *
      5  1.1  cgd  * Redistribution and use in source and binary forms, with or without
      6  1.1  cgd  * modification, are permitted provided that the following conditions
      7  1.1  cgd  * are met:
      8  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
      9  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     10  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     13  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     14  1.1  cgd  *    must display the following acknowledgement:
     15  1.1  cgd  *	This product includes software developed by the University of
     16  1.1  cgd  *	California, Berkeley and its contributors.
     17  1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     18  1.1  cgd  *    may be used to endorse or promote products derived from this software
     19  1.1  cgd  *    without specific prior written permission.
     20  1.1  cgd  *
     21  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  1.1  cgd  * SUCH DAMAGE.
     32  1.1  cgd  */
     33  1.1  cgd 
     34  1.1  cgd #if defined(LIBC_SCCS) && !defined(lint)
     35  1.1  cgd static char sccsid[] = "@(#)tempnam.c	5.1 (Berkeley) 2/22/91";
     36  1.1  cgd #endif /* LIBC_SCCS and not lint */
     37  1.1  cgd 
     38  1.1  cgd #include <sys/param.h>
     39  1.1  cgd #include <errno.h>
     40  1.1  cgd #include <stdio.h>
     41  1.1  cgd #include <stdlib.h>
     42  1.1  cgd #include <unistd.h>
     43  1.1  cgd #include <paths.h>
     44  1.1  cgd 
     45  1.1  cgd char *
     46  1.1  cgd tempnam(dir, pfx)
     47  1.1  cgd 	const char *dir, *pfx;
     48  1.1  cgd {
     49  1.1  cgd 	int sverrno;
     50  1.1  cgd 	char *f, *name;
     51  1.1  cgd 
     52  1.1  cgd 	if (!(name = malloc(MAXPATHLEN)))
     53  1.1  cgd 		return(NULL);
     54  1.1  cgd 
     55  1.1  cgd 	if (!pfx)
     56  1.1  cgd 		pfx = "tmp.";
     57  1.1  cgd 
     58  1.1  cgd 	if (f = getenv("TMPDIR")) {
     59  1.1  cgd 		(void)snprintf(name, MAXPATHLEN, "%s/%sXXXXXX", f, pfx);
     60  1.1  cgd 		if (f = mktemp(name))
     61  1.1  cgd 			return(f);
     62  1.1  cgd 	}
     63  1.1  cgd 
     64  1.1  cgd 	if (f = (char *)dir) {
     65  1.1  cgd 		(void)snprintf(name, MAXPATHLEN, "%s/%sXXXXXX", f, pfx);
     66  1.1  cgd 		if (f = mktemp(name))
     67  1.1  cgd 			return(f);
     68  1.1  cgd 	}
     69  1.1  cgd 
     70  1.1  cgd 	f = P_tmpdir;
     71  1.1  cgd 	(void)snprintf(name, MAXPATHLEN, "%s/%sXXXXXX", f, pfx);
     72  1.1  cgd 	if (f = mktemp(name))
     73  1.1  cgd 		return(f);
     74  1.1  cgd 
     75  1.1  cgd 	f = _PATH_TMP;
     76  1.1  cgd 	(void)snprintf(name, MAXPATHLEN, "%s/%sXXXXXX", f, pfx);
     77  1.1  cgd 	if (f = mktemp(name))
     78  1.1  cgd 		return(f);
     79  1.1  cgd 
     80  1.1  cgd 	sverrno = errno;
     81  1.1  cgd 	free(name);
     82  1.1  cgd 	errno = sverrno;
     83  1.1  cgd 	return(NULL);
     84  1.1  cgd }
     85