sysv_sem_14.c

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    1 /*      $NetBSD: sysv_sem_14.c,v 1.14 2008/04/28 20:23:41 martin 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_sem_14.c,v 1.14 2008/04/28 20:23:41 martin 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/sem.h>
   42 
   43 #ifndef SYSVSEM
   44 #define SYSVSEM
   45 #endif
   46 
   47 #include <sys/syscallargs.h>
   48 
   49 #include <compat/sys/sem.h>
   50 
   51 void
   52 semid_ds14_to_native(struct semid_ds14  *osembuf, struct semid_ds *sembuf)
   53 {
   54 
   55         ipc_perm14_to_native(&osembuf->sem_perm, &sembuf->sem_perm);
   56 
   57 #define CVT(x)  sembuf->x = osembuf->x
   58         CVT(sem_nsems);
   59         CVT(sem_otime);
   60         CVT(sem_ctime);
   61 #undef CVT
   62 }
   63 
   64 void
   65 native_to_semid_ds14(struct semid_ds *sembuf, struct semid_ds14 *osembuf)
   66 {
   67 
   68         memset(sembuf, 0, sizeof *sembuf);
   69         native_to_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm);
   70 
   71 #define CVT(x)  osembuf->x = sembuf->x
   72         CVT(sem_nsems);
   73         CVT(sem_otime);
   74         CVT(sem_ctime);
   75 #undef CVT
   76 }
   77 
   78 int
   79 compat_14_sys___semctl(struct lwp *l, const struct compat_14_sys___semctl_args *uap, register_t *retval)
   80 {
   81         /* {
   82                 syscallarg(int) semid;
   83                 syscallarg(int) semnum;
   84                 syscallarg(int) cmd;
   85                 syscallarg(union __semun *) arg;
   86         } */
   87         union __semun arg;
   88         struct semid_ds sembuf;
   89         struct semid_ds14 osembuf;
   90         int cmd, error;
   91         void *pass_arg;
   92 
   93         cmd = SCARG(uap, cmd);
   94 
   95         pass_arg = get_semctl_arg(cmd, &sembuf, &arg);
   96 
   97         if (pass_arg != NULL) {
   98                 error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
   99                 if (error)
  100                         return (error);
  101                 if (cmd == IPC_SET) {
  102                         error = copyin(arg.buf, &osembuf, sizeof(osembuf));
  103                         if (error)
  104                                 return (error);
  105                         semid_ds14_to_native(&osembuf, &sembuf);
  106                 }
  107         }
  108 
  109         error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
  110             pass_arg, retval);
  111 
  112         if (error == 0 && cmd == IPC_STAT) {
  113                 native_to_semid_ds14(&sembuf, &osembuf);
  114                 error = copyout(&osembuf, arg.buf, sizeof(osembuf));
  115         }
  116 
  117         return (error);
  118 }

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FreeBSD/Linux Kernel Cross Reference sys/compat/common/sysv_sem_14.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/common/sysv_sem_14.c