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sysv_sem_14.c revision 1.5 
      1 /*	$NetBSD: sysv_sem_14.c,v 1.5 2003/01/18 07:28:34 thorpej 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_sem_14.c,v 1.5 2003/01/18 07:28:34 thorpej 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/sem.h>
     49 
     50 #ifndef SYSVSEM
     51 #define	SYSVSEM
     52 #endif
     53 
     54 #include <sys/sa.h>
     55 #include <sys/syscallargs.h>
     56 
     57 static void semid_ds14_to_native __P((struct semid_ds14 *, struct semid_ds *));
     58 static void native_to_semid_ds14 __P((struct semid_ds *, struct semid_ds14 *));
     59 
     60 static void
     61 semid_ds14_to_native(osembuf, sembuf)
     62 	struct semid_ds14 *osembuf;
     63 	struct semid_ds *sembuf;
     64 {
     65 
     66 	ipc_perm14_to_native(&osembuf->sem_perm, &sembuf->sem_perm);
     67 
     68 #define	CVT(x)	sembuf->x = osembuf->x
     69 	CVT(sem_nsems);
     70 	CVT(sem_otime);
     71 	CVT(sem_ctime);
     72 #undef CVT
     73 }
     74 
     75 static void
     76 native_to_semid_ds14(sembuf, osembuf)
     77 	struct semid_ds *sembuf;
     78 	struct semid_ds14 *osembuf;
     79 {
     80 
     81 	native_to_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm);
     82 
     83 #define	CVT(x)	osembuf->x = sembuf->x
     84 	CVT(sem_nsems);
     85 	CVT(sem_otime);
     86 	CVT(sem_ctime);
     87 #undef CVT
     88 }
     89 
     90 int
     91 compat_14_sys___semctl(struct lwp *l, void *v, register_t *retval)
     92 {
     93 	struct compat_14_sys___semctl_args /* {
     94 		syscallarg(int) semid;
     95 		syscallarg(int) semnum;
     96 		syscallarg(int) cmd;
     97 		syscallarg(union __semun *) arg;
     98 	} */ *uap = v;
     99 	struct proc *p = l->l_proc;
    100 	union __semun arg;
    101 	struct semid_ds sembuf;
    102 	struct semid_ds14 osembuf;
    103 	int cmd, error;
    104 	void *pass_arg = NULL;
    105 
    106 	cmd = SCARG(uap, cmd);
    107 
    108 	switch (cmd) {
    109 	case IPC_SET:
    110 	case IPC_STAT:
    111 		pass_arg = &sembuf;
    112 		break;
    113 
    114 	case GETALL:
    115 	case SETVAL:
    116 	case SETALL:
    117 		pass_arg = &arg;
    118 		break;
    119 	}
    120 
    121 	if (pass_arg != NULL) {
    122 		error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
    123 		if (error)
    124 			return (error);
    125 		if (cmd == IPC_SET) {
    126 			error = copyin(arg.buf, &osembuf, sizeof(osembuf));
    127 			if (error)
    128 				return (error);
    129 			semid_ds14_to_native(&osembuf, &sembuf);
    130 		}
    131 	}
    132 
    133 	error = semctl1(p, SCARG(uap, semid), SCARG(uap, semnum), cmd,
    134 	    pass_arg, retval);
    135 
    136 	if (error == 0 && cmd == IPC_STAT) {
    137 		native_to_semid_ds14(&sembuf, &osembuf);
    138 		error = copyout(&osembuf, arg.buf, sizeof(osembuf));
    139 	}
    140 
    141 	return (error);
    142 }
    143