Home | History | Annotate | Line # | Download | only in common
sysv_shm_14.c revision 1.6 
      1 /*	$NetBSD: sysv_shm_14.c,v 1.6 2005/02/26 23:10:18 perry 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  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: sysv_shm_14.c,v 1.6 2005/02/26 23:10:18 perry Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/signal.h>
     46 #include <sys/proc.h>
     47 #include <sys/mount.h>
     48 #include <sys/shm.h>
     49 
     50 #ifndef SYSVSHM
     51 #define	SYSVSHM
     52 #endif
     53 
     54 #include <sys/sa.h>
     55 #include <sys/syscallargs.h>
     56 
     57 static void shmid_ds14_to_native __P((struct shmid_ds14 *, struct shmid_ds *));
     58 static void native_to_shmid_ds14 __P((struct shmid_ds *, struct shmid_ds14 *));
     59 
     60 static void
     61 shmid_ds14_to_native(oshmbuf, shmbuf)
     62 	struct shmid_ds14 *oshmbuf;
     63 	struct shmid_ds *shmbuf;
     64 {
     65 
     66 	ipc_perm14_to_native(&oshmbuf->shm_perm, &shmbuf->shm_perm);
     67 
     68 #define	CVT(x)	shmbuf->x = oshmbuf->x
     69 	CVT(shm_segsz);
     70 	CVT(shm_lpid);
     71 	CVT(shm_cpid);
     72 	CVT(shm_nattch);
     73 	CVT(shm_atime);
     74 	CVT(shm_dtime);
     75 	CVT(shm_ctime);
     76 #undef CVT
     77 }
     78 
     79 static void
     80 native_to_shmid_ds14(shmbuf, oshmbuf)
     81 	struct shmid_ds *shmbuf;
     82 	struct shmid_ds14 *oshmbuf;
     83 {
     84 
     85 	native_to_ipc_perm14(&shmbuf->shm_perm, &oshmbuf->shm_perm);
     86 
     87 #define	CVT(x)	oshmbuf->x = shmbuf->x
     88 	CVT(shm_segsz);
     89 	CVT(shm_lpid);
     90 	CVT(shm_cpid);
     91 	CVT(shm_nattch);
     92 	CVT(shm_atime);
     93 	CVT(shm_dtime);
     94 	CVT(shm_ctime);
     95 #undef CVT
     96 }
     97 
     98 int
     99 compat_14_sys_shmctl(struct lwp *l, void *v, register_t *retval)
    100 {
    101 	struct compat_14_sys_shmctl_args /* {
    102 		syscallarg(int) shmid;
    103 		syscallarg(int) cmd;
    104 		syscallarg(struct shmid_ds14 *) buf;
    105 	} */ *uap = v;
    106 	struct proc *p = l->l_proc;
    107 	struct shmid_ds shmbuf;
    108 	struct shmid_ds14 oshmbuf;
    109 	int cmd, error;
    110 
    111 	cmd = SCARG(uap, cmd);
    112 
    113 	if (cmd == IPC_SET) {
    114 		error = copyin(SCARG(uap, buf), &oshmbuf, sizeof(oshmbuf));
    115 		if (error)
    116 			return (error);
    117 		shmid_ds14_to_native(&oshmbuf, &shmbuf);
    118 	}
    119 
    120 	error = shmctl1(p, SCARG(uap, shmid), cmd,
    121 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);
    122 
    123 	if (error == 0 && cmd == IPC_STAT) {
    124 		native_to_shmid_ds14(&shmbuf, &oshmbuf);
    125 		error = copyout(&oshmbuf, SCARG(uap, buf), sizeof(oshmbuf));
    126 	}
    127 
    128 	return (error);
    129 }
    130