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sysv_shm_14.c revision 1.14.8.1 
      1 /*	$NetBSD: sysv_shm_14.c,v 1.14.8.1 2008/05/18 12:33:09 yamt 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 1.14.8.1 2008/05/18 12:33:09 yamt 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 static void shmid_ds14_to_native(struct shmid_ds14 *, struct shmid_ds *);
     52 static void native_to_shmid_ds14(struct shmid_ds *, struct shmid_ds14 *);
     53 
     54 static void
     55 shmid_ds14_to_native(struct shmid_ds14 *oshmbuf, struct shmid_ds *shmbuf)
     56 {
     57 
     58 	ipc_perm14_to_native(&oshmbuf->shm_perm, &shmbuf->shm_perm);
     59 
     60 #define	CVT(x)	shmbuf->x = oshmbuf->x
     61 	CVT(shm_segsz);
     62 	CVT(shm_lpid);
     63 	CVT(shm_cpid);
     64 	CVT(shm_nattch);
     65 	CVT(shm_atime);
     66 	CVT(shm_dtime);
     67 	CVT(shm_ctime);
     68 #undef CVT
     69 }
     70 
     71 static void
     72 native_to_shmid_ds14(struct shmid_ds *shmbuf, struct shmid_ds14 *oshmbuf)
     73 {
     74 
     75 	native_to_ipc_perm14(&shmbuf->shm_perm, &oshmbuf->shm_perm);
     76 
     77 #define	CVT(x)	oshmbuf->x = shmbuf->x
     78 	CVT(shm_segsz);
     79 	CVT(shm_lpid);
     80 	CVT(shm_cpid);
     81 	CVT(shm_nattch);
     82 	CVT(shm_atime);
     83 	CVT(shm_dtime);
     84 	CVT(shm_ctime);
     85 #undef CVT
     86 }
     87 
     88 int
     89 compat_14_sys_shmctl(struct lwp *l, const struct compat_14_sys_shmctl_args *uap, register_t *retval)
     90 {
     91 	/* {
     92 		syscallarg(int) shmid;
     93 		syscallarg(int) cmd;
     94 		syscallarg(struct shmid_ds14 *) buf;
     95 	} */
     96 	struct shmid_ds shmbuf;
     97 	struct shmid_ds14 oshmbuf;
     98 	int cmd, error;
     99 
    100 	cmd = SCARG(uap, cmd);
    101 
    102 	if (cmd == IPC_SET) {
    103 		error = copyin(SCARG(uap, buf), &oshmbuf, sizeof(oshmbuf));
    104 		if (error)
    105 			return (error);
    106 		shmid_ds14_to_native(&oshmbuf, &shmbuf);
    107 	}
    108 
    109 	error = shmctl1(l, SCARG(uap, shmid), cmd,
    110 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);
    111 
    112 	if (error == 0 && cmd == IPC_STAT) {
    113 		native_to_shmid_ds14(&shmbuf, &oshmbuf);
    114 		error = copyout(&oshmbuf, SCARG(uap, buf), sizeof(oshmbuf));
    115 	}
    116 
    117 	return (error);
    118 }
    119