1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include "libuutil_common.h"
30 
31 #include <sys/time.h>
32 
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <limits.h>
36 #include <stdio.h>
37 #include <unistd.h>
38 
39 #ifdef _LP64
40 #define	TMPPATHFMT	"%s/uu%ld"
41 #else /* _LP64 */
42 #define	TMPPATHFMT	"%s/uu%lld"
43 #endif /* _LP64 */
44 
45 /*ARGSUSED*/
46 int
uu_open_tmp(const char * dir,uint_t uflags)47 uu_open_tmp(const char *dir, uint_t uflags)
48 {
49 	int f;
50 	char *fname = uu_zalloc(PATH_MAX);
51 
52 	if (fname == NULL)
53 		return (-1);
54 
55 	for (;;) {
56 		(void) snprintf(fname, PATH_MAX, "%s/uu%lld", dir, gethrtime());
57 
58 		f = open(fname, O_CREAT | O_EXCL | O_RDWR, 0600);
59 
60 		if (f >= 0 || errno != EEXIST)
61 			break;
62 	}
63 
64 	if (f >= 0)
65 		(void) unlink(fname);
66 
67 	uu_free(fname);
68 
69 	return (f);
70 }
71