Home | History | Annotate | Line # | Download | only in common 
      1 /*	$NetBSD: sysv_sem_14.c,v 1.17 2019/01/27 02:08:39 pgoyette 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 1.17 2019/01/27 02:08:39 pgoyette Exp $");
     35 
     36 #if defined(_KERNEL_OPT)
     37 #include "opt_compat_netbsd.h"
     38 #endif
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/signal.h>
     43 #include <sys/proc.h>
     44 #include <sys/sem.h>
     45 
     46 #ifndef SYSVSEM
     47 #define	SYSVSEM
     48 #endif
     49 
     50 #include <sys/syscallargs.h>
     51 
     52 #include <compat/sys/sem.h>
     53 
     54 
     55 int
     56 compat_14_sys___semctl(struct lwp *l, const struct compat_14_sys___semctl_args *uap, register_t *retval)
     57 {
     58 	/* {
     59 		syscallarg(int) semid;
     60 		syscallarg(int) semnum;
     61 		syscallarg(int) cmd;
     62 		syscallarg(union __semun *) arg;
     63 	} */
     64 	union __semun arg;
     65 	struct semid_ds sembuf;
     66 	struct semid_ds14 osembuf;
     67 	int cmd, error;
     68 	void *pass_arg;
     69 
     70 	cmd = SCARG(uap, cmd);
     71 
     72 	pass_arg = get_semctl_arg(cmd, &sembuf, &arg);
     73 
     74 	if (pass_arg != NULL) {
     75 		error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
     76 		if (error)
     77 			return (error);
     78 		if (cmd == IPC_SET) {
     79 			error = copyin(arg.buf, &osembuf, sizeof(osembuf));
     80 			if (error)
     81 				return (error);
     82 			__semid_ds14_to_native(&osembuf, &sembuf);
     83 		}
     84 	}
     85 
     86 	error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
     87 	    pass_arg, retval);
     88 
     89 	if (error == 0 && cmd == IPC_STAT) {
     90 		__native_to_semid_ds14(&sembuf, &osembuf);
     91 		error = copyout(&osembuf, arg.buf, sizeof(osembuf));
     92 	}
     93 
     94 	return (error);
     95 }
     96