usr/src/lib/libc/port/sys/shmsys.c

   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 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma weak _shmat = shmat
  31 #pragma weak _shmctl = shmctl
  32 #pragma weak _shmctl64 = shmctl64
  33 #pragma weak _shmdt = shmdt
  34 #pragma weak _shmget = shmget
  35 #pragma weak _shmids = shmids
  36
  37 #include "lint.h"
  38 #include <sys/types.h>
  39 #include <sys/ipc.h>
  40 #include <sys/ipc_impl.h>
  41 #include <sys/shm.h>
  42 #include <sys/shm_impl.h>
  43 #include <sys/syscall.h>
  44 #include <errno.h>
  45
  46 void *
  47 shmat(int shmid, const void *shmaddr, int shmflg)
  48 {
  49         sysret_t rval;
  50         int error;
  51
  52         error = __systemcall(&rval, SYS_shmsys, SHMAT, shmid, shmaddr, shmflg);
  53         if (error)
  54                 (void) __set_errno(error);
  55         return ((void *)rval.sys_rval1);
  56 }
  57
  58 int
  59 shmctl(int shmid, int cmd, struct shmid_ds *buf)
  60 {
  61         if (cmd == IPC_SET64 || cmd == IPC_STAT64) {
  62                 (void) __set_errno(EINVAL);
  63                 return (-1);
  64         }
  65         return (syscall(SYS_shmsys, SHMCTL, shmid, cmd, buf));
  66 }
  67
  68 int
  69 shmctl64(int shmid, int cmd, struct shmid_ds64 *buf)
  70 {
  71         if (cmd != IPC_SET64 && cmd != IPC_STAT64) {
  72                 (void) __set_errno(EINVAL);
  73                 return (-1);
  74         }
  75         return (syscall(SYS_shmsys, SHMCTL, shmid, cmd, buf));
  76 }
  77
  78 int
  79 shmdt(char *shmaddr)
  80 {
  81         return (syscall(SYS_shmsys, SHMDT, shmaddr));
  82 }
  83
  84 int
  85 shmget(key_t key, size_t size, int shmflg)
  86 {
  87         return (syscall(SYS_shmsys, SHMGET, key, size, shmflg));
  88 }
  89
  90 int
  91 shmids(int *buf, uint_t nids, uint_t *pnids)
  92 {
  93         return (syscall(SYS_shmsys, SHMIDS, buf, nids, pnids));
  94 }