FreeBSD/Linux Kernel Cross Reference
sys/compat/common/sysv_shm_14.c

     /*      $NetBSD: sysv_shm_14.c,v 1.15 2008/04/28 20:23:41 martin Exp $  */
     
     /*-
      * Copyright (c) 1999 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      * NASA Ames Research Center.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: sysv_shm_14.c,v 1.15 2008/04/28 20:23:41 martin Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/signal.h>
    #include <sys/proc.h>
    #include <sys/mount.h>
    #include <sys/shm.h>
    
    #ifndef SYSVSHM
    #define SYSVSHM
    #endif
    
    #include <sys/syscallargs.h>
    
    #include <compat/sys/shm.h>
    
    static void shmid_ds14_to_native(struct shmid_ds14 *, struct shmid_ds *);
    static void native_to_shmid_ds14(struct shmid_ds *, struct shmid_ds14 *);
    
    static void
    shmid_ds14_to_native(struct shmid_ds14 *oshmbuf, struct shmid_ds *shmbuf)
    {
    
            ipc_perm14_to_native(&oshmbuf->shm_perm, &shmbuf->shm_perm);
    
    #define CVT(x)  shmbuf->x = oshmbuf->x
            CVT(shm_segsz);
            CVT(shm_lpid);
            CVT(shm_cpid);
            CVT(shm_nattch);
            CVT(shm_atime);
            CVT(shm_dtime);
            CVT(shm_ctime);
    #undef CVT
    }
    
    static void
    native_to_shmid_ds14(struct shmid_ds *shmbuf, struct shmid_ds14 *oshmbuf)
    {
    
            native_to_ipc_perm14(&shmbuf->shm_perm, &oshmbuf->shm_perm);
    
    #define CVT(x)  oshmbuf->x = shmbuf->x
            CVT(shm_segsz);
            CVT(shm_lpid);
            CVT(shm_cpid);
            CVT(shm_nattch);
            CVT(shm_atime);
            CVT(shm_dtime);
            CVT(shm_ctime);
    #undef CVT
    }
    
    int
    compat_14_sys_shmctl(struct lwp *l, const struct compat_14_sys_shmctl_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(int) shmid;
                    syscallarg(int) cmd;
                    syscallarg(struct shmid_ds14 *) buf;
            } */
            struct shmid_ds shmbuf;
            struct shmid_ds14 oshmbuf;
            int cmd, error;
    
           cmd = SCARG(uap, cmd);
   
           if (cmd == IPC_SET) {
                   error = copyin(SCARG(uap, buf), &oshmbuf, sizeof(oshmbuf));
                   if (error)
                           return (error);
                   shmid_ds14_to_native(&oshmbuf, &shmbuf);
           }
   
           error = shmctl1(l, SCARG(uap, shmid), cmd,
               (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL);
   
           if (error == 0 && cmd == IPC_STAT) {
                   native_to_shmid_ds14(&shmbuf, &oshmbuf);
                   error = copyout(&oshmbuf, SCARG(uap, buf), sizeof(oshmbuf));
           }
   
           return (error);
   }

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