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 37 int 38 shm_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 74 int 75 shm_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