1f841f6adSraf /*
2f841f6adSraf * CDDL HEADER START
3f841f6adSraf *
4f841f6adSraf * The contents of this file are subject to the terms of the
5f841f6adSraf * Common Development and Distribution License (the "License").
6f841f6adSraf * You may not use this file except in compliance with the License.
7f841f6adSraf *
8f841f6adSraf * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9f841f6adSraf * or http://www.opensolaris.org/os/licensing.
10f841f6adSraf * See the License for the specific language governing permissions
11f841f6adSraf * and limitations under the License.
12f841f6adSraf *
13f841f6adSraf * When distributing Covered Code, include this CDDL HEADER in each
14f841f6adSraf * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15f841f6adSraf * If applicable, add the following below this CDDL HEADER, with the
16f841f6adSraf * fields enclosed by brackets "[]" replaced with your own identifying
17f841f6adSraf * information: Portions Copyright [yyyy] [name of copyright owner]
18f841f6adSraf *
19f841f6adSraf * CDDL HEADER END
20f841f6adSraf */
21f841f6adSraf
22f841f6adSraf /*
23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24f841f6adSraf * Use is subject to license terms.
25f841f6adSraf */
26f841f6adSraf
27f841f6adSraf #pragma ident "%Z%%M% %I% %E% SMI"
28f841f6adSraf
29*7257d1b4Sraf #include "lint.h"
30f841f6adSraf #include <sys/types.h>
31f841f6adSraf #include <sys/mman.h>
32f841f6adSraf #include <fcntl.h>
33f841f6adSraf #include <limits.h>
34f841f6adSraf #include <errno.h>
35f841f6adSraf #include "pos4obj.h"
36f841f6adSraf
37f841f6adSraf int
shm_open(const char * path,int oflag,mode_t mode)38f841f6adSraf shm_open(const char *path, int oflag, mode_t mode)
39f841f6adSraf {
40f841f6adSraf int crflag;
41f841f6adSraf int fd;
42f841f6adSraf int flags;
43f841f6adSraf
44f841f6adSraf if (__pos4obj_check(path) == -1)
45f841f6adSraf return (-1);
46f841f6adSraf
47f841f6adSraf /* acquire semaphore lock to have atomic operation */
48f841f6adSraf if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0)
49f841f6adSraf return (-1);
50f841f6adSraf
51f841f6adSraf fd = __pos4obj_open(path, SHM_DATA_TYPE, oflag, mode, &crflag);
52f841f6adSraf
53f841f6adSraf if (fd < 0) {
54f841f6adSraf (void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
55f841f6adSraf return (-1);
56f841f6adSraf }
57f841f6adSraf
58f841f6adSraf if ((flags = fcntl(fd, F_GETFD)) < 0 ||
59f841f6adSraf fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
60f841f6adSraf (void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
61f841f6adSraf (void) __close_nc(fd);
62f841f6adSraf return (-1);
63f841f6adSraf }
64f841f6adSraf
65f841f6adSraf /* relase semaphore lock operation */
66f841f6adSraf if (__pos4obj_unlock(path, SHM_LOCK_TYPE) < 0) {
67f841f6adSraf (void) __close_nc(fd);
68f841f6adSraf return (-1);
69f841f6adSraf }
70f841f6adSraf
71f841f6adSraf return (fd);
72f841f6adSraf }
73f841f6adSraf
74f841f6adSraf int
shm_unlink(const char * path)75f841f6adSraf shm_unlink(const char *path)
76f841f6adSraf {
77f841f6adSraf int oerrno;
78f841f6adSraf int err;
79f841f6adSraf
80f841f6adSraf if (__pos4obj_check(path) < 0)
81f841f6adSraf return (-1);
82f841f6adSraf
83f841f6adSraf if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0)
84f841f6adSraf return (-1);
85f841f6adSraf
86f841f6adSraf err = __pos4obj_unlink(path, SHM_DATA_TYPE);
87f841f6adSraf
88f841f6adSraf oerrno = errno;
89f841f6adSraf
90f841f6adSraf (void) __pos4obj_unlock(path, SHM_LOCK_TYPE);
91f841f6adSraf
92f841f6adSraf errno = oerrno;
93f841f6adSraf return (err);
94f841f6adSraf
95f841f6adSraf }
96