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 #include "lint.h" 28 #include <sys/types.h> 29 #include <sys/mman.h> 30 #include <fcntl.h> 31 #include <limits.h> 32 #include <errno.h> 33 #include "pos4obj.h" 34 35 int 36 shm_open(const char *path, int oflag, mode_t mode) 37 { 38 int crflag; 39 int fd; 40 int flags; 41 42 if (__pos4obj_check(path) == -1) 43 return (-1); 44 45 /* acquire semaphore lock to have atomic operation */ 46 if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0) 47 return (-1); 48 49 fd = __pos4obj_open(path, SHM_DATA_TYPE, oflag, mode, &crflag); 50 51 if (fd < 0) { 52 (void) __pos4obj_unlock(path, SHM_LOCK_TYPE); 53 return (-1); 54 } 55 56 if ((flags = fcntl(fd, F_GETFD)) < 0 || 57 fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) { 58 (void) __pos4obj_unlock(path, SHM_LOCK_TYPE); 59 (void) __close_nc(fd); 60 return (-1); 61 } 62 63 /* relase semaphore lock operation */ 64 if (__pos4obj_unlock(path, SHM_LOCK_TYPE) < 0) { 65 (void) __close_nc(fd); 66 return (-1); 67 } 68 69 return (fd); 70 } 71 72 int 73 shm_unlink(const char *path) 74 { 75 int oerrno; 76 int err; 77 78 if (__pos4obj_check(path) < 0) 79 return (-1); 80 81 if (__pos4obj_lock(path, SHM_LOCK_TYPE) < 0) 82 return (-1); 83 84 err = __pos4obj_unlink(path, SHM_DATA_TYPE); 85 86 oerrno = errno; 87 88 (void) __pos4obj_unlock(path, SHM_LOCK_TYPE); 89 90 errno = oerrno; 91 return (err); 92 93 } 94