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sysv_shm_14.c revision 1.16 
      1 /*	$NetBSD: sysv_shm_14.c,v 1.16 2009/01/11 02:45:47 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: sysv_shm_14.c,v 1.16 2009/01/11 02:45:47 christos Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/signal.h>
     39 #include <sys/proc.h>
     40 #include <sys/mount.h>
     41 #include <sys/shm.h>
     42 
     43 #ifndef SYSVSHM
     44 #define	SYSVSHM
     45 #endif
     46 
     47 #include <sys/syscallargs.h>
     48 
     49 #include <compat/sys/shm.h>
     50 
     51 
     52 int
     53 compat_14_sys_shmctl(struct lwp *l, const struct compat_14_sys_shmctl_args *uap, register_t *retval)
     54 {
     55 	/* {
     56 		syscallarg(int) shmid;
     57 		syscallarg(int) cmd;
     58 		syscallarg(struct shmid_ds14 *) buf;
     59 	} */
     60 	struct shmid_ds shmbuf;
     61 	struct shmid_ds14 oshmbuf;
     62 	int cmd, error;
     63 
     64 	cmd = SCARG(uap, cmd);
     65 
     66 	if (cmd == IPC_SET) {
     67 		error = copyin(SCARG(uap, buf), &oshmbuf, sizeof(oshmbuf));
     68 		if (error)
     69 			return (error);
     70 		__shmid_ds14_to_native(&oshmbuf, &shmbuf);
     71 	}
     72 
     73 	error = shmctl1(l, SCARG(uap, shmid), cmd,
     74 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);
     75 
     76 	if (error == 0 && cmd == IPC_STAT) {
     77 		__native_to_shmid_ds14(&shmbuf, &oshmbuf);
     78 		error = copyout(&oshmbuf, SCARG(uap, buf), sizeof(oshmbuf));
     79 	}
     80 
     81 	return (error);
     82 }
     83