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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 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 "lint.h"
30#include <sys/types.h>
31#include <sys/mman.h>
32#include <fcntl.h>
33#include <limits.h>
34#include <errno.h>
35#include "pos4obj.h"
36
37int
38shm_open(const char *path, int oflag, mode_t mode)
39{
40	int crflag;
41	int fd;
42	int flags;
43
44	if (__pos4obj_check(path) == -1)
45		return (-1);
46
47	/* acquire semaphore lock to have atomic operation */
48	if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0)
49		return (-1);
50
51	fd = __pos4obj_open(path, SHM_DATA_TYPE, oflag, mode, &crflag);
52
53	if (fd < 0) {
54		(void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
55		return (-1);
56	}
57
58	if ((flags = fcntl(fd, F_GETFD)) < 0 ||
59	    fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
60		(void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
61		(void) __close_nc(fd);
62		return (-1);
63	}
64
65	/* relase semaphore lock operation */
66	if (__pos4obj_unlock(path, SHM_LOCK_TYPE) < 0) {
67		(void) __close_nc(fd);
68		return (-1);
69	}
70
71	return (fd);
72}
73
74int
75shm_unlink(const char *path)
76{
77	int	oerrno;
78	int	err;
79
80	if (__pos4obj_check(path) < 0)
81		return (-1);
82
83	if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0)
84		return (-1);
85
86	err = __pos4obj_unlink(path, SHM_DATA_TYPE);
87
88	oerrno = errno;
89
90	(void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
91
92	errno = oerrno;
93	return (err);
94
95}
96