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sysv_msg_14.c revision 1.14 
      1 /*	$NetBSD: sysv_msg_14.c,v 1.14 2007/12/04 18:40:07 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 1.14 2007/12/04 18:40:07 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(omsqbuf, msqbuf)
     63 	struct msqid_ds14 *omsqbuf;
     64 	struct msqid_ds *msqbuf;
     65 {
     66 
     67 	ipc_perm14_to_native(&omsqbuf->msg_perm, &msqbuf->msg_perm);
     68 
     69 #define	CVT(x)	msqbuf->x = omsqbuf->x
     70 	CVT(msg_qnum);
     71 	CVT(msg_qbytes);
     72 	CVT(msg_lspid);
     73 	CVT(msg_lrpid);
     74 	CVT(msg_stime);
     75 	CVT(msg_rtime);
     76 	CVT(msg_ctime);
     77 #undef CVT
     78 }
     79 
     80 static void
     81 native_to_msqid_ds14(msqbuf, omsqbuf)
     82 	struct msqid_ds *msqbuf;
     83 	struct msqid_ds14 *omsqbuf;
     84 {
     85 
     86 	native_to_ipc_perm14(&msqbuf->msg_perm, &omsqbuf->msg_perm);
     87 
     88 #define	CVT(x)	omsqbuf->x = msqbuf->x
     89 	CVT(msg_qnum);
     90 	CVT(msg_qbytes);
     91 	CVT(msg_lspid);
     92 	CVT(msg_lrpid);
     93 	CVT(msg_stime);
     94 	CVT(msg_rtime);
     95 	CVT(msg_ctime);
     96 #undef CVT
     97 
     98 	/*
     99 	 * Not part of the API, but some programs might look at it.
    100 	 */
    101 	omsqbuf->msg_cbytes = msqbuf->_msg_cbytes;
    102 }
    103 
    104 int
    105 compat_14_sys_msgctl(struct lwp *l, void *v, register_t *retval)
    106 {
    107 	struct compat_14_sys_msgctl_args /* {
    108 		syscallarg(int) msqid;
    109 		syscallarg(int) cmd;
    110 		syscallarg(struct msqid_ds14 *) buf;
    111 	} */ *uap = v;
    112 	struct msqid_ds msqbuf;
    113 	struct msqid_ds14 omsqbuf;
    114 	int cmd, error;
    115 
    116 	cmd = SCARG(uap, cmd);
    117 
    118 	if (cmd == IPC_SET) {
    119 		error = copyin(SCARG(uap, buf), &omsqbuf, sizeof(omsqbuf));
    120 		if (error)
    121 			return (error);
    122 		msqid_ds14_to_native(&omsqbuf, &msqbuf);
    123 	}
    124 
    125 	error = msgctl1(l, SCARG(uap, msqid), cmd,
    126 	    (cmd == IPC_SET || cmd == IPC_STAT) ? &msqbuf : NULL);
    127 
    128 	if (error == 0 && cmd == IPC_STAT) {
    129 		native_to_msqid_ds14(&msqbuf, &omsqbuf);
    130 		error = copyout(&omsqbuf, SCARG(uap, buf), sizeof(omsqbuf));
    131 	}
    132 
    133 	return (error);
    134 }
    135