1 /* $NetBSD: sysv_sem_14.c,v 1.9 2005/11/10 18:43:32 christos 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 1.9 2005/11/10 18:43:32 christos 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 #include <compat/sys/sem.h> 58 59 static void semid_ds14_to_native __P((struct semid_ds14 *, struct semid_ds *)); 60 static void native_to_semid_ds14 __P((struct semid_ds *, struct semid_ds14 *)); 61 62 static void 63 semid_ds14_to_native(osembuf, sembuf) 64 struct semid_ds14 *osembuf; 65 struct semid_ds *sembuf; 66 { 67 68 ipc_perm14_to_native(&osembuf->sem_perm, &sembuf->sem_perm); 69 70 #define CVT(x) sembuf->x = osembuf->x 71 CVT(sem_nsems); 72 CVT(sem_otime); 73 CVT(sem_ctime); 74 #undef CVT 75 } 76 77 static void 78 native_to_semid_ds14(sembuf, osembuf) 79 struct semid_ds *sembuf; 80 struct semid_ds14 *osembuf; 81 { 82 83 native_to_ipc_perm14(&sembuf->sem_perm, &osembuf->sem_perm); 84 85 #define CVT(x) osembuf->x = sembuf->x 86 CVT(sem_nsems); 87 CVT(sem_otime); 88 CVT(sem_ctime); 89 #undef CVT 90 } 91 92 int 93 compat_14_sys___semctl(struct lwp *l, void *v, register_t *retval) 94 { 95 struct compat_14_sys___semctl_args /* { 96 syscallarg(int) semid; 97 syscallarg(int) semnum; 98 syscallarg(int) cmd; 99 syscallarg(union __semun *) arg; 100 } */ *uap = v; 101 struct proc *p = l->l_proc; 102 union __semun arg; 103 struct semid_ds sembuf; 104 struct semid_ds14 osembuf; 105 int cmd, error; 106 void *pass_arg = NULL; 107 108 cmd = SCARG(uap, cmd); 109 110 switch (cmd) { 111 case IPC_SET: 112 case IPC_STAT: 113 pass_arg = &sembuf; 114 break; 115 116 case GETALL: 117 case SETVAL: 118 case SETALL: 119 pass_arg = &arg; 120 break; 121 } 122 123 if (pass_arg != NULL) { 124 error = copyin(SCARG(uap, arg), &arg, sizeof(arg)); 125 if (error) 126 return (error); 127 if (cmd == IPC_SET) { 128 error = copyin(arg.buf, &osembuf, sizeof(osembuf)); 129 if (error) 130 return (error); 131 semid_ds14_to_native(&osembuf, &sembuf); 132 } 133 } 134 135 error = semctl1(p, SCARG(uap, semid), SCARG(uap, semnum), cmd, 136 pass_arg, retval); 137 138 if (error == 0 && cmd == IPC_STAT) { 139 native_to_semid_ds14(&sembuf, &osembuf); 140 error = copyout(&osembuf, arg.buf, sizeof(osembuf)); 141 } 142 143 return (error); 144 } 145