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sysv_sem_14.c revision 1.3 
      1 /*	$NetBSD: sysv_sem_14.c,v 1.3 2000/12/17 15:55:47 jdolecek 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/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/signal.h>
     43 #include <sys/proc.h>
     44 #include <sys/mount.h>
     45 #include <sys/sem.h>
     46 
     47 #ifndef SYSVSEM
     48 #define	SYSVSEM
     49 #endif
     50 
     51 #include <sys/syscallargs.h>
     52 
     53 static void semid_ds14_to_native __P((struct semid_ds14 *, struct semid_ds *));
     54 static void native_to_semid_ds14 __P((struct semid_ds *, struct semid_ds14 *));
     55 
     56 static void
     57 semid_ds14_to_native(osembuf, sembuf)
     58 	struct semid_ds14 *osembuf;
     59 	struct semid_ds *sembuf;
     60 {
     61 
     62 	ipc_perm14_to_native(&osembuf->sem_perm, &sembuf->sem_perm);
     63 
     64 #define	CVT(x)	sembuf->x = osembuf->x
     65 	CVT(sem_nsems);
     66 	CVT(sem_otime);
     67 	CVT(sem_ctime);
     68 #undef CVT
     69 }
     70 
     71 static void
     72 native_to_semid_ds14(sembuf, osembuf)
     73 	struct semid_ds *sembuf;
     74 	struct semid_ds14 *osembuf;
     75 {
     76 
     77 	native_to_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm);
     78 
     79 #define	CVT(x)	osembuf->x = sembuf->x
     80 	CVT(sem_nsems);
     81 	CVT(sem_otime);
     82 	CVT(sem_ctime);
     83 #undef CVT
     84 }
     85 
     86 int
     87 compat_14_sys___semctl(p, v, retval)
     88 	struct proc *p;
     89 	void *v;
     90 	register_t *retval;
     91 {
     92 	struct compat_14_sys___semctl_args /* {
     93 		syscallarg(int) semid;
     94 		syscallarg(int) semnum;
     95 		syscallarg(int) cmd;
     96 		syscallarg(union __semun *) arg;
     97 	} */ *uap = v;
     98 	union __semun arg;
     99 	struct semid_ds sembuf;
    100 	struct semid_ds14 osembuf;
    101 	int cmd, error;
    102 	void *pass_arg = NULL;
    103 
    104 	cmd = SCARG(uap, cmd);
    105 
    106 	switch (cmd) {
    107 	case IPC_SET:
    108 	case IPC_STAT:
    109 		pass_arg = &sembuf;
    110 		break;
    111 
    112 	case GETALL:
    113 	case SETVAL:
    114 	case SETALL:
    115 		pass_arg = &arg;
    116 		break;
    117 	}
    118 
    119 	if (pass_arg != NULL) {
    120 		error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
    121 		if (error)
    122 			return (error);
    123 		if (cmd == IPC_SET) {
    124 			error = copyin(arg.buf, &osembuf, sizeof(osembuf));
    125 			if (error)
    126 				return (error);
    127 			semid_ds14_to_native(&osembuf, &sembuf);
    128 		}
    129 	}
    130 
    131 	error = semctl1(p, SCARG(uap, semid), SCARG(uap, semnum), cmd,
    132 	    pass_arg, retval);
    133 
    134 	if (error == 0 && cmd == IPC_STAT) {
    135 		native_to_semid_ds14(&sembuf, &osembuf);
    136 		error = copyout(&osembuf, arg.buf, sizeof(osembuf));
    137 	}
    138 
    139 	return (error);
    140 }
    141