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sysv_msg_14.c revision 1.15 
      1 /*	$NetBSD: sysv_msg_14.c,v 1.15 2007/12/08 18:35:54 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_msg_14.c,v 1.15 2007/12/08 18:35:54 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/msg.h>
     49 
     50 #include <compat/sys/msg.h>
     51 
     52 #ifndef SYSVMSG
     53 #define	SYSVMSG
     54 #endif
     55 
     56 #include <sys/syscallargs.h>
     57 
     58 static void msqid_ds14_to_native(struct msqid_ds14 *, struct msqid_ds *);
     59 static void native_to_msqid_ds14(struct msqid_ds *, struct msqid_ds14 *);
     60 
     61 static void
     62 msqid_ds14_to_native(struct msqid_ds14 *omsqbuf, struct msqid_ds *msqbuf)
     63 {
     64 
     65 	ipc_perm14_to_native(&omsqbuf->msg_perm, &msqbuf->msg_perm);
     66 
     67 #define	CVT(x)	msqbuf->x = omsqbuf->x
     68 	CVT(msg_qnum);
     69 	CVT(msg_qbytes);
     70 	CVT(msg_lspid);
     71 	CVT(msg_lrpid);
     72 	CVT(msg_stime);
     73 	CVT(msg_rtime);
     74 	CVT(msg_ctime);
     75 #undef CVT
     76 }
     77 
     78 static void
     79 native_to_msqid_ds14(struct msqid_ds *msqbuf, struct msqid_ds14 *omsqbuf)
     80 {
     81 
     82 	native_to_ipc_perm14(&msqbuf->msg_perm, &omsqbuf->msg_perm);
     83 
     84 #define	CVT(x)	omsqbuf->x = msqbuf->x
     85 	CVT(msg_qnum);
     86 	CVT(msg_qbytes);
     87 	CVT(msg_lspid);
     88 	CVT(msg_lrpid);
     89 	CVT(msg_stime);
     90 	CVT(msg_rtime);
     91 	CVT(msg_ctime);
     92 #undef CVT
     93 
     94 	/*
     95 	 * Not part of the API, but some programs might look at it.
     96 	 */
     97 	omsqbuf->msg_cbytes = msqbuf->_msg_cbytes;
     98 }
     99 
    100 int
    101 compat_14_sys_msgctl(struct lwp *l, void *v, register_t *retval)
    102 {
    103 	struct compat_14_sys_msgctl_args /* {
    104 		syscallarg(int) msqid;
    105 		syscallarg(int) cmd;
    106 		syscallarg(struct msqid_ds14 *) buf;
    107 	} */ *uap = v;
    108 	struct msqid_ds msqbuf;
    109 	struct msqid_ds14 omsqbuf;
    110 	int cmd, error;
    111 
    112 	cmd = SCARG(uap, cmd);
    113 
    114 	if (cmd == IPC_SET) {
    115 		error = copyin(SCARG(uap, buf), &omsqbuf, sizeof(omsqbuf));
    116 		if (error)
    117 			return (error);
    118 		msqid_ds14_to_native(&omsqbuf, &msqbuf);
    119 	}
    120 
    121 	error = msgctl1(l, SCARG(uap, msqid), cmd,
    122 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &msqbuf : NULL);
    123 
    124 	if (error == 0 && cmd == IPC_STAT) {
    125 		native_to_msqid_ds14(&msqbuf, &omsqbuf);
    126 		error = copyout(&omsqbuf, SCARG(uap, buf), sizeof(omsqbuf));
    127 	}
    128 
    129 	return (error);
    130 }
    131