sys/compat/common/sysv_sem_14.c

   1 /*      $NetBSD: sysv_sem_14.c,v 1.14.12.1 2008/11/09 23:28:36 christos 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 1.14.12.1 2008/11/09 23:28:36 christos 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
  52 int
  53 compat_14_sys___semctl(struct lwp *l, const struct compat_14_sys___semctl_args *uap, register_t *retval)
  54 {
  55         /* {
  56                 syscallarg(int) semid;
  57                 syscallarg(int) semnum;
  58                 syscallarg(int) cmd;
  59                 syscallarg(union __semun *) arg;
  60         } */
  61         union __semun arg;
  62         struct semid_ds sembuf;
  63         struct semid_ds14 osembuf;
  64         int cmd, error;
  65         void *pass_arg;
  66
  67         cmd = SCARG(uap, cmd);
  68
  69         pass_arg = get_semctl_arg(cmd, &sembuf, &arg);
  70
  71         if (pass_arg != NULL) {
  72                 error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
  73                 if (error)
  74                         return (error);
  75                 if (cmd == IPC_SET) {
  76                         error = copyin(arg.buf, &osembuf, sizeof(osembuf));
  77                         if (error)
  78                                 return (error);
  79                         __semid_ds14_to_native(&osembuf, &sembuf);
  80                 }
  81         }
  82
  83         error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
  84             pass_arg, retval);
  85
  86         if (error == 0 && cmd == IPC_STAT) {
  87                 __native_to_semid_ds14(&sembuf, &osembuf);
  88                 error = copyout(&osembuf, arg.buf, sizeof(osembuf));
  89         }
  90
  91         return (error);
  92 }