kern_sig_43.c revision 1.23.4.2
1 /* $NetBSD: kern_sig_43.c,v 1.23.4.2 2007/01/11 22:22:59 ad 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 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: kern_sig_43.c,v 1.23.4.2 2007/01/11 22:22:59 ad Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/signalvar.h> 48 #include <sys/resourcevar.h> 49 #include <sys/namei.h> 50 #include <sys/vnode.h> 51 #include <sys/proc.h> 52 #include <sys/systm.h> 53 #include <sys/timeb.h> 54 #include <sys/times.h> 55 #include <sys/buf.h> 56 #include <sys/acct.h> 57 #include <sys/file.h> 58 #include <sys/kernel.h> 59 #include <sys/wait.h> 60 #include <sys/ktrace.h> 61 #include <sys/syslog.h> 62 #include <sys/stat.h> 63 #include <sys/core.h> 64 #include <sys/kauth.h> 65 66 #include <sys/mount.h> 67 #include <sys/sa.h> 68 #include <sys/syscallargs.h> 69 70 #include <machine/cpu.h> 71 72 #include <sys/user.h> /* for coredump */ 73 74 #include <compat/sys/signal.h> 75 76 void compat_43_sigmask_to_sigset __P((const int *, sigset_t *)); 77 void compat_43_sigset_to_sigmask __P((const sigset_t *, int *)); 78 void compat_43_sigvec_to_sigaction __P((const struct sigvec *, struct sigaction *)); 79 void compat_43_sigaction_to_sigvec __P((const struct sigaction *, struct sigvec *)); 80 void compat_43_sigstack_to_sigaltstack __P((const struct sigstack *, struct sigaltstack *)); 81 void compat_43_sigaltstack_to_sigstack __P((const struct sigaltstack *, struct sigstack *)); 82 83 void 84 compat_43_sigmask_to_sigset(sm, ss) 85 const int *sm; 86 sigset_t *ss; 87 { 88 89 ss->__bits[0] = *sm; 90 ss->__bits[1] = 0; 91 ss->__bits[2] = 0; 92 ss->__bits[3] = 0; 93 } 94 95 void 96 compat_43_sigset_to_sigmask(ss, sm) 97 const sigset_t *ss; 98 int *sm; 99 { 100 101 *sm = ss->__bits[0]; 102 } 103 104 void 105 compat_43_sigvec_to_sigaction(sv, sa) 106 const struct sigvec *sv; 107 struct sigaction *sa; 108 { 109 sa->sa_handler = sv->sv_handler; 110 compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask); 111 sa->sa_flags = sv->sv_flags ^ SA_RESTART; 112 } 113 114 void 115 compat_43_sigaction_to_sigvec(sa, sv) 116 const struct sigaction *sa; 117 struct sigvec *sv; 118 { 119 sv->sv_handler = sa->sa_handler; 120 compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); 121 sv->sv_flags = sa->sa_flags ^ SA_RESTART; 122 } 123 124 void 125 compat_43_sigstack_to_sigaltstack(ss, sa) 126 const struct sigstack *ss; 127 struct sigaltstack *sa; 128 { 129 sa->ss_sp = ss->ss_sp; 130 sa->ss_size = SIGSTKSZ; /* Use the recommended size */ 131 sa->ss_flags = 0; 132 if (ss->ss_onstack) 133 sa->ss_flags |= SS_ONSTACK; 134 } 135 136 void 137 compat_43_sigaltstack_to_sigstack(sa, ss) 138 const struct sigaltstack *sa; 139 struct sigstack *ss; 140 { 141 ss->ss_sp = sa->ss_sp; 142 if (sa->ss_flags & SS_ONSTACK) 143 ss->ss_onstack = 1; 144 else 145 ss->ss_onstack = 0; 146 } 147 148 int 149 compat_43_sys_sigblock(struct lwp *l, void *v, register_t *retval) 150 { 151 struct compat_43_sys_sigblock_args /* { 152 syscallarg(int) mask; 153 } */ *uap = v; 154 struct proc *p = l->l_proc; 155 int nsm, osm; 156 sigset_t nss, oss; 157 int error; 158 159 nsm = SCARG(uap, mask); 160 compat_43_sigmask_to_sigset(&nsm, &nss); 161 mutex_enter(&p->p_smutex); 162 error = sigprocmask1(l, SIG_BLOCK, &nss, &oss); 163 mutex_exit(&p->p_smutex); 164 if (error) 165 return (error); 166 compat_43_sigset_to_sigmask(&oss, &osm); 167 *retval = osm; 168 return (0); 169 } 170 171 int 172 compat_43_sys_sigsetmask(struct lwp *l, void *v, register_t *retval) 173 { 174 struct compat_43_sys_sigsetmask_args /* { 175 syscallarg(int) mask; 176 } */ *uap = v; 177 struct proc *p = l->l_proc; 178 int nsm, osm; 179 sigset_t nss, oss; 180 int error; 181 182 nsm = SCARG(uap, mask); 183 compat_43_sigmask_to_sigset(&nsm, &nss); 184 mutex_enter(&p->p_smutex); 185 error = sigprocmask1(l, SIG_SETMASK, &nss, &oss); 186 mutex_exit(&p->p_smutex); 187 if (error) 188 return (error); 189 compat_43_sigset_to_sigmask(&oss, &osm); 190 *retval = osm; 191 return (0); 192 } 193 194 /* ARGSUSED */ 195 int 196 compat_43_sys_sigstack(struct lwp *l, void *v, register_t *retval) 197 { 198 struct compat_43_sys_sigstack_args /* { 199 syscallarg(struct sigstack *) nss; 200 syscallarg(struct sigstack *) oss; 201 } */ *uap = v; 202 struct sigstack nss, oss; 203 struct sigaltstack nsa, osa; 204 int error; 205 206 if (SCARG(uap, nss)) { 207 error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); 208 if (error) 209 return (error); 210 compat_43_sigstack_to_sigaltstack(&nss, &nsa); 211 } 212 error = sigaltstack1(l, 213 SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); 214 if (error) 215 return (error); 216 if (SCARG(uap, oss)) { 217 compat_43_sigaltstack_to_sigstack(&osa, &oss); 218 error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); 219 if (error) 220 return (error); 221 } 222 return (0); 223 } 224 225 /* 226 * Generalized interface signal handler, 4.3-compatible. 227 */ 228 /* ARGSUSED */ 229 int 230 compat_43_sys_sigvec(struct lwp *l, void *v, register_t *retval) 231 { 232 struct compat_43_sys_sigvec_args /* { 233 syscallarg(int) signum; 234 syscallarg(const struct sigvec *) nsv; 235 syscallarg(struct sigvec *) osv; 236 } */ *uap = v; 237 struct sigvec nsv, osv; 238 struct sigaction nsa, osa; 239 int error; 240 241 if (SCARG(uap, nsv)) { 242 error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); 243 if (error) 244 return (error); 245 compat_43_sigvec_to_sigaction(&nsv, &nsa); 246 } 247 error = sigaction1(l, SCARG(uap, signum), 248 SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0, 249 NULL, 0); 250 if (error) 251 return (error); 252 if (SCARG(uap, osv)) { 253 compat_43_sigaction_to_sigvec(&osa, &osv); 254 error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); 255 if (error) 256 return (error); 257 } 258 return (0); 259 } 260 261 262 /* ARGSUSED */ 263 int 264 compat_43_sys_killpg(struct lwp *l, void *v, register_t *retval) 265 { 266 struct compat_43_sys_killpg_args /* { 267 syscallarg(int) pgid; 268 syscallarg(int) signum; 269 } */ *uap = v; 270 ksiginfo_t ksi; 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 memset(&ksi, 0, sizeof(ksi)); 279 ksi.ksi_signo = SCARG(uap, signum); 280 ksi.ksi_code = SI_USER; 281 ksi.ksi_pid = l->l_proc->p_pid; 282 ksi.ksi_uid = kauth_cred_geteuid(l->l_cred); 283 return (killpg1(l, &ksi, SCARG(uap, pgid), 0)); 284 } 285
Indexes created Sat Oct 18 08:10:09 GMT 2025