Home | History | Annotate | Line # | Download | only in common
sysv_shm_14.c revision 1.11.18.1 
      1 /*	$NetBSD: sysv_shm_14.c,v 1.11.18.1 2007/12/09 19:36:37 jmcneill 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 1.11.18.1 2007/12/09 19:36:37 jmcneill 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/syscallargs.h>
     55 
     56 #include <compat/sys/shm.h>
     57 
     58 static void shmid_ds14_to_native(struct shmid_ds14 *, struct shmid_ds *);
     59 static void native_to_shmid_ds14(struct shmid_ds *, struct shmid_ds14 *);
     60 
     61 static void
     62 shmid_ds14_to_native(struct shmid_ds14 *oshmbuf, struct shmid_ds *shmbuf)
     63 {
     64 
     65 	ipc_perm14_to_native(&oshmbuf->shm_perm, &shmbuf->shm_perm);
     66 
     67 #define	CVT(x)	shmbuf->x = oshmbuf->x
     68 	CVT(shm_segsz);
     69 	CVT(shm_lpid);
     70 	CVT(shm_cpid);
     71 	CVT(shm_nattch);
     72 	CVT(shm_atime);
     73 	CVT(shm_dtime);
     74 	CVT(shm_ctime);
     75 #undef CVT
     76 }
     77 
     78 static void
     79 native_to_shmid_ds14(struct shmid_ds *shmbuf, struct shmid_ds14 *oshmbuf)
     80 {
     81 
     82 	native_to_ipc_perm14(&shmbuf->shm_perm, &oshmbuf->shm_perm);
     83 
     84 #define	CVT(x)	oshmbuf->x = shmbuf->x
     85 	CVT(shm_segsz);
     86 	CVT(shm_lpid);
     87 	CVT(shm_cpid);
     88 	CVT(shm_nattch);
     89 	CVT(shm_atime);
     90 	CVT(shm_dtime);
     91 	CVT(shm_ctime);
     92 #undef CVT
     93 }
     94 
     95 int
     96 compat_14_sys_shmctl(struct lwp *l, void *v, register_t *retval)
     97 {
     98 	struct compat_14_sys_shmctl_args /* {
     99 		syscallarg(int) shmid;
    100 		syscallarg(int) cmd;
    101 		syscallarg(struct shmid_ds14 *) buf;
    102 	} */ *uap = v;
    103 	struct shmid_ds shmbuf;
    104 	struct shmid_ds14 oshmbuf;
    105 	int cmd, error;
    106 
    107 	cmd = SCARG(uap, cmd);
    108 
    109 	if (cmd == IPC_SET) {
    110 		error = copyin(SCARG(uap, buf), &oshmbuf, sizeof(oshmbuf));
    111 		if (error)
    112 			return (error);
    113 		shmid_ds14_to_native(&oshmbuf, &shmbuf);
    114 	}
    115 
    116 	error = shmctl1(l, SCARG(uap, shmid), cmd,
    117 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);
    118 
    119 	if (error == 0 && cmd == IPC_STAT) {
    120 		native_to_shmid_ds14(&shmbuf, &oshmbuf);
    121 		error = copyout(&oshmbuf, SCARG(uap, buf), sizeof(oshmbuf));
    122 	}
    123 
    124 	return (error);
    125 }
    126