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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/syscall.h> 33 #include <stdarg.h> 34 #include <sys/types.h> 35 #include <sys/ipc.h> 36 #include <sys/shm.h> 37 #include <errno.h> 38 39 40 /* shmsys dispatch argument */ 41 #define SHMAT 0 42 #define SHMCTL 1 43 #define SHMDT 2 44 #define SHMGET 3 45 46 struct shmid_sv { 47 struct ipc_perm shm_perm; 48 int shm_segsz; 49 struct anon_map *shm_amp; 50 unsigned short shm_lkcnt; 51 char pad[2]; 52 short shm_lpid; 53 short shm_cpid; 54 unsigned short shm_nattch; 55 unsigned short shm_cnattch; 56 time_t shm_atime; 57 time_t shm_dtime; 58 time_t shm_ctime; 59 }; 60 61 62 char * 63 shmat(int shmid, char *shmaddr, int shmflg) 64 { 65 return ((char *)_syscall(SYS_shmsys, SHMAT, shmid, shmaddr, shmflg)); 66 } 67 68 int 69 shmctl(int shmid, int cmd, struct shmid_ds *buf) 70 { 71 struct shmid_sv n_buf; 72 int ret; 73 74 if (buf == (struct shmid_ds *)-1) { 75 errno = EFAULT; 76 return (-1); 77 } 78 79 if (buf == 0) { 80 ret = _syscall(SYS_shmsys, SHMCTL, shmid, cmd, 0); 81 } else { 82 n_buf.shm_perm = buf->shm_perm; 83 n_buf.shm_segsz = buf->shm_segsz; 84 n_buf.shm_amp = buf->shm_amp; 85 n_buf.shm_lpid = buf->shm_lpid; 86 n_buf.shm_cpid = buf->shm_cpid; 87 n_buf.shm_nattch = buf->shm_nattch; 88 n_buf.shm_atime = buf->shm_atime; 89 n_buf.shm_dtime = buf->shm_dtime; 90 n_buf.shm_ctime = buf->shm_ctime; 91 n_buf.shm_lkcnt = 0; 92 n_buf.shm_cnattch = 0; 93 94 ret = _syscall(SYS_shmsys, SHMCTL, shmid, cmd, &n_buf); 95 96 buf->shm_perm = n_buf.shm_perm; 97 buf->shm_segsz = n_buf.shm_segsz; 98 buf->shm_amp = n_buf.shm_amp; 99 buf->shm_lpid = n_buf.shm_lpid; 100 buf->shm_cpid = n_buf.shm_cpid; 101 buf->shm_nattch = n_buf.shm_nattch; 102 buf->shm_atime = n_buf.shm_atime; 103 buf->shm_dtime = n_buf.shm_dtime; 104 buf->shm_ctime = n_buf.shm_ctime; 105 } 106 107 return (ret); 108 } 109 110 int 111 shmdt(char *shmaddr) 112 { 113 return (_syscall(SYS_shmsys, SHMDT, shmaddr)); 114 } 115 116 int 117 shmget(key_t key, int size, int shmflg) 118 { 119 return (_syscall(SYS_shmsys, SHMGET, key, size, shmflg)); 120 } 121 122 int 123 shmsys(int sysnum, ...) 124 { 125 va_list ap; 126 int shmid, shmflg, cmd, size; 127 char *shmaddr; 128 struct shmid_ds *buf; 129 key_t key; 130 131 va_start(ap, sysnum); 132 switch (sysnum) { 133 case SHMAT: 134 shmid = va_arg(ap, int); 135 shmaddr = va_arg(ap, char *); 136 shmflg = va_arg(ap, int); 137 va_end(ap); 138 return ((int)shmat(shmid, shmaddr, shmflg)); 139 case SHMCTL: 140 shmid = va_arg(ap, int); 141 cmd = va_arg(ap, int); 142 buf = va_arg(ap, struct shmid_ds *); 143 va_end(ap); 144 return (shmctl(shmid, cmd, buf)); 145 case SHMDT: 146 shmaddr = va_arg(ap, char *); 147 va_end(ap); 148 return (shmdt(shmaddr)); 149 case SHMGET: 150 key = va_arg(ap, key_t); 151 size = va_arg(ap, int); 152 shmflg = va_arg(ap, int); 153 va_end(ap); 154 return (shmget(key, size, shmflg)); 155 } 156 va_end(ap); 157 return (-1); 158 } 159