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Commit	Line	Data
	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: src/lib/libc/stdio/tempnam.c,v 1.11 2007/01/09 00:28:07 imp Exp $");
	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
	60	if (!pfx)
	61	pfx = "tmp.";
	62
	63	#if !__DARWIN_UNIX03
	64	if (issetugid() == 0 && (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	#endif /* !__DARWIN_UNIX03 */
	72	if ((f = (char *)dir)) {
	73	#if __DARWIN_UNIX03
	74	if (access(dir, W_OK) == 0) {
	75	#endif /* __DARWIN_UNIX03 */
	76	(void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f,
	77	*(f + strlen(f) - 1) == '/'? "": "/", pfx);
	78	if ((f = _mktemp(name))) {
	79	return(f);
	80	}
	81	#if __DARWIN_UNIX03
	82	}
	83	#endif /* __DARWIN_UNIX03 */
	84	}
	85
	86	f = P_tmpdir;
	87	#if __DARWIN_UNIX03
	88	if (access(f, W_OK) == 0) { /* directory accessible? */
	89	#endif /* __DARWIN_UNIX03 */
	90	(void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx);
	91	if ((f = _mktemp(name))) {
	92	return(f);
	93	}
	94
	95	#if __DARWIN_UNIX03
	96	}
	97	if (issetugid() == 0 && (f = getenv("TMPDIR")) && access(f, W_OK) == 0) {
	98	(void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f,
	99	*(f + strlen(f) - 1) == '/'? "": "/", pfx);
	100	if ((f = _mktemp(name))) {
	101	return(f);
	102	}
	103	}
	104	#endif /* __DARWIN_UNIX03 */
	105	f = _PATH_TMP;
	106	(void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx);
	107	if ((f = _mktemp(name))) {
	108	return(f);
	109	}
	110
	111	sverrno = errno;
	112	free(name);
	113	errno = sverrno;
	114	return(NULL);
	115	}