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sysv_sem_14.c revision 1.13 
      1 /*	$NetBSD: sysv_sem_14.c,v 1.13 2007/12/20 23:02:44 dsl 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 1.13 2007/12/20 23:02:44 dsl 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/syscallargs.h>
     55 
     56 #include <compat/sys/sem.h>
     57 
     58 void
     59 semid_ds14_to_native(struct semid_ds14  *osembuf, 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 void
     72 native_to_semid_ds14(struct semid_ds *sembuf, struct semid_ds14 *osembuf)
     73 {
     74 
     75 	memset(sembuf, 0, sizeof *sembuf);
     76 	native_to_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm);
     77 
     78 #define	CVT(x)	osembuf->x = sembuf->x
     79 	CVT(sem_nsems);
     80 	CVT(sem_otime);
     81 	CVT(sem_ctime);
     82 #undef CVT
     83 }
     84 
     85 int
     86 compat_14_sys___semctl(struct lwp *l, const struct compat_14_sys___semctl_args *uap, register_t *retval)
     87 {
     88 	/* {
     89 		syscallarg(int) semid;
     90 		syscallarg(int) semnum;
     91 		syscallarg(int) cmd;
     92 		syscallarg(union __semun *) arg;
     93 	} */
     94 	union __semun arg;
     95 	struct semid_ds sembuf;
     96 	struct semid_ds14 osembuf;
     97 	int cmd, error;
     98 	void *pass_arg;
     99 
    100 	cmd = SCARG(uap, cmd);
    101 
    102 	pass_arg = get_semctl_arg(cmd, &sembuf, &arg);
    103 
    104 	if (pass_arg != NULL) {
    105 		error = copyin(SCARG(uap, arg), &arg, sizeof(arg));
    106 		if (error)
    107 			return (error);
    108 		if (cmd == IPC_SET) {
    109 			error = copyin(arg.buf, &osembuf, sizeof(osembuf));
    110 			if (error)
    111 				return (error);
    112 			semid_ds14_to_native(&osembuf, &sembuf);
    113 		}
    114 	}
    115 
    116 	error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
    117 	    pass_arg, retval);
    118 
    119 	if (error == 0 && cmd == IPC_STAT) {
    120 		native_to_semid_ds14(&sembuf, &osembuf);
    121 		error = copyout(&osembuf, arg.buf, sizeof(osembuf));
    122 	}
    123 
    124 	return (error);
    125 }
    126