xref: /onnv-gate/usr/src/lib/libuutil/common/uu_open.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include "libuutil_common.h"
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #include <sys/time.h>
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate #include <errno.h>
34*0Sstevel@tonic-gate #include <fcntl.h>
35*0Sstevel@tonic-gate #include <limits.h>
36*0Sstevel@tonic-gate #include <stdio.h>
37*0Sstevel@tonic-gate #include <unistd.h>
38*0Sstevel@tonic-gate 
39*0Sstevel@tonic-gate #ifdef _LP64
40*0Sstevel@tonic-gate #define	TMPPATHFMT	"%s/uu%ld"
41*0Sstevel@tonic-gate #else /* _LP64 */
42*0Sstevel@tonic-gate #define	TMPPATHFMT	"%s/uu%lld"
43*0Sstevel@tonic-gate #endif /* _LP64 */
44*0Sstevel@tonic-gate 
45*0Sstevel@tonic-gate /*ARGSUSED*/
46*0Sstevel@tonic-gate int
uu_open_tmp(const char * dir,uint_t uflags)47*0Sstevel@tonic-gate uu_open_tmp(const char *dir, uint_t uflags)
48*0Sstevel@tonic-gate {
49*0Sstevel@tonic-gate 	int f;
50*0Sstevel@tonic-gate 	char *fname = uu_zalloc(PATH_MAX);
51*0Sstevel@tonic-gate 
52*0Sstevel@tonic-gate 	if (fname == NULL)
53*0Sstevel@tonic-gate 		return (-1);
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate 	for (;;) {
56*0Sstevel@tonic-gate 		(void) snprintf(fname, PATH_MAX, "%s/uu%lld", dir, gethrtime());
57*0Sstevel@tonic-gate 
58*0Sstevel@tonic-gate 		f = open(fname, O_CREAT | O_EXCL | O_RDWR, 0600);
59*0Sstevel@tonic-gate 
60*0Sstevel@tonic-gate 		if (f >= 0 || errno != EEXIST)
61*0Sstevel@tonic-gate 			break;
62*0Sstevel@tonic-gate 	}
63*0Sstevel@tonic-gate 
64*0Sstevel@tonic-gate 	if (f >= 0)
65*0Sstevel@tonic-gate 		(void) unlink(fname);
66*0Sstevel@tonic-gate 
67*0Sstevel@tonic-gate 	uu_free(fname);
68*0Sstevel@tonic-gate 
69*0Sstevel@tonic-gate 	return (f);
70*0Sstevel@tonic-gate }
71