kern_sig_43.c revision 1.15
1/* $NetBSD: kern_sig_43.c,v 1.15 2001/05/30 11:37:22 mrg Exp $ */ 2 3/*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#if defined(_KERNEL_OPT) 40#include "opt_compat_netbsd.h" 41#endif 42 43#include <sys/param.h> 44#include <sys/signalvar.h> 45#include <sys/resourcevar.h> 46#include <sys/namei.h> 47#include <sys/vnode.h> 48#include <sys/proc.h> 49#include <sys/systm.h> 50#include <sys/timeb.h> 51#include <sys/times.h> 52#include <sys/buf.h> 53#include <sys/acct.h> 54#include <sys/file.h> 55#include <sys/kernel.h> 56#include <sys/wait.h> 57#include <sys/ktrace.h> 58#include <sys/syslog.h> 59#include <sys/stat.h> 60#include <sys/core.h> 61 62#include <sys/mount.h> 63#include <sys/syscallargs.h> 64 65#include <machine/cpu.h> 66 67#include <sys/user.h> /* for coredump */ 68 69void compat_43_sigmask_to_sigset __P((const int *, sigset_t *)); 70void compat_43_sigset_to_sigmask __P((const sigset_t *, int *)); 71void compat_43_sigvec_to_sigaction __P((const struct sigvec *, struct sigaction *)); 72void compat_43_sigaction_to_sigvec __P((const struct sigaction *, struct sigvec *)); 73void compat_43_sigstack_to_sigaltstack __P((const struct sigstack *, struct sigaltstack *)); 74void compat_43_sigaltstack_to_sigstack __P((const struct sigaltstack *, struct sigstack *)); 75 76void 77compat_43_sigmask_to_sigset(sm, ss) 78 const int *sm; 79 sigset_t *ss; 80{ 81 82 ss->__bits[0] = *sm; 83 ss->__bits[1] = 0; 84 ss->__bits[2] = 0; 85 ss->__bits[3] = 0; 86} 87 88void 89compat_43_sigset_to_sigmask(ss, sm) 90 const sigset_t *ss; 91 int *sm; 92{ 93 94 *sm = ss->__bits[0]; 95} 96 97void 98compat_43_sigvec_to_sigaction(sv, sa) 99 const struct sigvec *sv; 100 struct sigaction *sa; 101{ 102 sa->sa_handler = sv->sv_handler; 103 compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask); 104 sa->sa_flags = sv->sv_flags ^ SA_RESTART; 105} 106 107void 108compat_43_sigaction_to_sigvec(sa, sv) 109 const struct sigaction *sa; 110 struct sigvec *sv; 111{ 112 sv->sv_handler = sa->sa_handler; 113 compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); 114 sv->sv_flags = sa->sa_flags ^ SA_RESTART; 115} 116 117void 118compat_43_sigstack_to_sigaltstack(ss, sa) 119 const struct sigstack *ss; 120 struct sigaltstack *sa; 121{ 122 sa->ss_sp = ss->ss_sp; 123 sa->ss_size = SIGSTKSZ; /* Use the recommended size */ 124 sa->ss_flags = 0; 125 if (ss->ss_onstack) 126 sa->ss_flags |= SS_ONSTACK; 127} 128 129void 130compat_43_sigaltstack_to_sigstack(sa, ss) 131 const struct sigaltstack *sa; 132 struct sigstack *ss; 133{ 134 ss->ss_sp = sa->ss_sp; 135 if (sa->ss_flags & SS_ONSTACK) 136 ss->ss_onstack = 1; 137 else 138 ss->ss_onstack = 0; 139} 140 141int 142compat_43_sys_sigblock(p, v, retval) 143 struct proc *p; 144 void *v; 145 register_t *retval; 146{ 147 struct compat_43_sys_sigblock_args /* { 148 syscallarg(int) mask; 149 } */ *uap = v; 150 int nsm, osm; 151 sigset_t nss, oss; 152 int error; 153 154 nsm = SCARG(uap, mask); 155 compat_43_sigmask_to_sigset(&nsm, &nss); 156 error = sigprocmask1(p, SIG_BLOCK, &nss, &oss); 157 if (error) 158 return (error); 159 compat_43_sigset_to_sigmask(&oss, &osm); 160 *retval = osm; 161 return (0); 162} 163 164int 165compat_43_sys_sigsetmask(p, v, retval) 166 struct proc *p; 167 void *v; 168 register_t *retval; 169{ 170 struct compat_43_sys_sigsetmask_args /* { 171 syscallarg(int) mask; 172 } */ *uap = v; 173 int nsm, osm; 174 sigset_t nss, oss; 175 int error; 176 177 nsm = SCARG(uap, mask); 178 compat_43_sigmask_to_sigset(&nsm, &nss); 179 error = sigprocmask1(p, SIG_SETMASK, &nss, &oss); 180 if (error) 181 return (error); 182 compat_43_sigset_to_sigmask(&oss, &osm); 183 *retval = osm; 184 return (0); 185} 186 187/* ARGSUSED */ 188int 189compat_43_sys_sigstack(p, v, retval) 190 struct proc *p; 191 void *v; 192 register_t *retval; 193{ 194 struct compat_43_sys_sigstack_args /* { 195 syscallarg(struct sigstack *) nss; 196 syscallarg(struct sigstack *) oss; 197 } */ *uap = v; 198 struct sigstack nss, oss; 199 struct sigaltstack nsa, osa; 200 int error; 201 202 if (SCARG(uap, nss)) { 203 error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); 204 if (error) 205 return (error); 206 compat_43_sigstack_to_sigaltstack(&nss, &nsa); 207 } 208 error = sigaltstack1(p, 209 SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); 210 if (error) 211 return (error); 212 if (SCARG(uap, oss)) { 213 compat_43_sigaltstack_to_sigstack(&osa, &oss); 214 error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); 215 if (error) 216 return (error); 217 } 218 return (0); 219} 220 221/* 222 * Generalized interface signal handler, 4.3-compatible. 223 */ 224/* ARGSUSED */ 225int 226compat_43_sys_sigvec(p, v, retval) 227 struct proc *p; 228 void *v; 229 register_t *retval; 230{ 231 struct compat_43_sys_sigvec_args /* { 232 syscallarg(int) signum; 233 syscallarg(const struct sigvec *) nsv; 234 syscallarg(struct sigvec *) osv; 235 } */ *uap = v; 236 struct sigvec nsv, osv; 237 struct sigaction nsa, osa; 238 int error; 239 240 if (SCARG(uap, nsv)) { 241 error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); 242 if (error) 243 return (error); 244 compat_43_sigvec_to_sigaction(&nsv, &nsa); 245 } 246 error = sigaction1(p, SCARG(uap, signum), 247 SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0); 248 if (error) 249 return (error); 250 if (SCARG(uap, osv)) { 251 compat_43_sigaction_to_sigvec(&osa, &osv); 252 error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); 253 if (error) 254 return (error); 255 } 256 return (0); 257} 258 259 260/* ARGSUSED */ 261int 262compat_43_sys_killpg(p, v, retval) 263 struct proc *p; 264 void *v; 265 register_t *retval; 266{ 267 struct compat_43_sys_killpg_args /* { 268 syscallarg(int) pgid; 269 syscallarg(int) signum; 270 } */ *uap = v; 271 272#ifdef COMPAT_09 273 SCARG(uap, pgid) = (short) SCARG(uap, pgid); 274#endif 275 276 if ((u_int)SCARG(uap, signum) >= NSIG) 277 return (EINVAL); 278 return (killpg1(p, SCARG(uap, signum), SCARG(uap, pgid), 0)); 279} 280