| 1 | /* $NetBSD: kern_sig_43.c,v 1.34 2011/01/19 10:21:16 tsutsui 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: kern_sig_43.c,v 1.34 2011/01/19 10:21:16 tsutsui Exp $" ); |
| 34 | |
| 35 | #if defined(_KERNEL_OPT) |
| 36 | #include "opt_compat_netbsd.h" |
| 37 | #endif |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/signalvar.h> |
| 41 | #include <sys/resourcevar.h> |
| 42 | #include <sys/namei.h> |
| 43 | #include <sys/vnode.h> |
| 44 | #include <sys/proc.h> |
| 45 | #include <sys/systm.h> |
| 46 | #include <sys/timeb.h> |
| 47 | #include <sys/times.h> |
| 48 | #include <sys/buf.h> |
| 49 | #include <sys/acct.h> |
| 50 | #include <sys/file.h> |
| 51 | #include <sys/kernel.h> |
| 52 | #include <sys/wait.h> |
| 53 | #include <sys/ktrace.h> |
| 54 | #include <sys/syslog.h> |
| 55 | #include <sys/stat.h> |
| 56 | #include <sys/core.h> |
| 57 | #include <sys/kauth.h> |
| 58 | |
| 59 | #include <sys/syscallargs.h> |
| 60 | |
| 61 | #include <sys/cpu.h> |
| 62 | |
| 63 | #include <compat/sys/signal.h> |
| 64 | |
| 65 | void compat_43_sigmask_to_sigset(const int *, sigset_t *); |
| 66 | void compat_43_sigset_to_sigmask(const sigset_t *, int *); |
| 67 | void compat_43_sigvec_to_sigaction(const struct sigvec *, struct sigaction *); |
| 68 | void compat_43_sigaction_to_sigvec(const struct sigaction *, struct sigvec *); |
| 69 | void compat_43_sigstack_to_sigaltstack(const struct sigstack *, struct sigaltstack *); |
| 70 | void compat_43_sigaltstack_to_sigstack(const struct sigaltstack *, struct sigstack *); |
| 71 | |
| 72 | void |
| 73 | compat_43_sigmask_to_sigset(const int *sm, sigset_t *ss) |
| 74 | { |
| 75 | |
| 76 | ss->__bits[0] = *sm; |
| 77 | ss->__bits[1] = 0; |
| 78 | ss->__bits[2] = 0; |
| 79 | ss->__bits[3] = 0; |
| 80 | } |
| 81 | |
| 82 | void |
| 83 | compat_43_sigset_to_sigmask(const sigset_t *ss, int *sm) |
| 84 | { |
| 85 | |
| 86 | *sm = ss->__bits[0]; |
| 87 | } |
| 88 | |
| 89 | void |
| 90 | compat_43_sigvec_to_sigaction(const struct sigvec *sv, struct sigaction *sa) |
| 91 | { |
| 92 | sa->sa_handler = sv->sv_handler; |
| 93 | compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask); |
| 94 | sa->sa_flags = sv->sv_flags ^ SA_RESTART; |
| 95 | } |
| 96 | |
| 97 | void |
| 98 | compat_43_sigaction_to_sigvec(const struct sigaction *sa, struct sigvec *sv) |
| 99 | { |
| 100 | sv->sv_handler = sa->sa_handler; |
| 101 | compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); |
| 102 | sv->sv_flags = sa->sa_flags ^ SA_RESTART; |
| 103 | } |
| 104 | |
| 105 | void |
| 106 | compat_43_sigstack_to_sigaltstack(const struct sigstack *ss, struct sigaltstack *sa) |
| 107 | { |
| 108 | sa->ss_sp = ss->ss_sp; |
| 109 | sa->ss_size = SIGSTKSZ; /* Use the recommended size */ |
| 110 | sa->ss_flags = 0; |
| 111 | if (ss->ss_onstack) |
| 112 | sa->ss_flags |= SS_ONSTACK; |
| 113 | } |
| 114 | |
| 115 | void |
| 116 | compat_43_sigaltstack_to_sigstack(const struct sigaltstack *sa, struct sigstack *ss) |
| 117 | { |
| 118 | ss->ss_sp = sa->ss_sp; |
| 119 | if (sa->ss_flags & SS_ONSTACK) |
| 120 | ss->ss_onstack = 1; |
| 121 | else |
| 122 | ss->ss_onstack = 0; |
| 123 | } |
| 124 | |
| 125 | int |
| 126 | compat_43_sys_sigblock(struct lwp *l, const struct compat_43_sys_sigblock_args *uap, register_t *retval) |
| 127 | { |
| 128 | /* { |
| 129 | syscallarg(int) mask; |
| 130 | } */ |
| 131 | struct proc *p = l->l_proc; |
| 132 | int nsm, osm; |
| 133 | sigset_t nss, oss; |
| 134 | int error; |
| 135 | |
| 136 | nsm = SCARG(uap, mask); |
| 137 | compat_43_sigmask_to_sigset(&nsm, &nss); |
| 138 | mutex_enter(p->p_lock); |
| 139 | error = sigprocmask1(l, SIG_BLOCK, &nss, &oss); |
| 140 | mutex_exit(p->p_lock); |
| 141 | if (error) |
| 142 | return (error); |
| 143 | compat_43_sigset_to_sigmask(&oss, &osm); |
| 144 | *retval = osm; |
| 145 | return (0); |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | compat_43_sys_sigsetmask(struct lwp *l, const struct compat_43_sys_sigsetmask_args *uap, register_t *retval) |
| 150 | { |
| 151 | /* { |
| 152 | syscallarg(int) mask; |
| 153 | } */ |
| 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_lock); |
| 162 | error = sigprocmask1(l, SIG_SETMASK, &nss, &oss); |
| 163 | mutex_exit(p->p_lock); |
| 164 | if (error) |
| 165 | return (error); |
| 166 | compat_43_sigset_to_sigmask(&oss, &osm); |
| 167 | *retval = osm; |
| 168 | return (0); |
| 169 | } |
| 170 | |
| 171 | /* ARGSUSED */ |
| 172 | int |
| 173 | compat_43_sys_sigstack(struct lwp *l, const struct compat_43_sys_sigstack_args *uap, register_t *retval) |
| 174 | { |
| 175 | /* { |
| 176 | syscallarg(struct sigstack *) nss; |
| 177 | syscallarg(struct sigstack *) oss; |
| 178 | } */ |
| 179 | struct sigstack nss, oss; |
| 180 | struct sigaltstack nsa, osa; |
| 181 | int error; |
| 182 | |
| 183 | if (SCARG(uap, nss)) { |
| 184 | error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); |
| 185 | if (error) |
| 186 | return (error); |
| 187 | compat_43_sigstack_to_sigaltstack(&nss, &nsa); |
| 188 | } |
| 189 | error = sigaltstack1(l, |
| 190 | SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); |
| 191 | if (error) |
| 192 | return (error); |
| 193 | if (SCARG(uap, oss)) { |
| 194 | compat_43_sigaltstack_to_sigstack(&osa, &oss); |
| 195 | error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); |
| 196 | if (error) |
| 197 | return (error); |
| 198 | } |
| 199 | return (0); |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * Generalized interface signal handler, 4.3-compatible. |
| 204 | */ |
| 205 | /* ARGSUSED */ |
| 206 | int |
| 207 | compat_43_sys_sigvec(struct lwp *l, const struct compat_43_sys_sigvec_args *uap, register_t *retval) |
| 208 | { |
| 209 | /* { |
| 210 | syscallarg(int) signum; |
| 211 | syscallarg(const struct sigvec *) nsv; |
| 212 | syscallarg(struct sigvec *) osv; |
| 213 | } */ |
| 214 | struct sigvec nsv, osv; |
| 215 | struct sigaction nsa, osa; |
| 216 | int error; |
| 217 | |
| 218 | if (SCARG(uap, nsv)) { |
| 219 | error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); |
| 220 | if (error) |
| 221 | return (error); |
| 222 | compat_43_sigvec_to_sigaction(&nsv, &nsa); |
| 223 | } |
| 224 | error = sigaction1(l, SCARG(uap, signum), |
| 225 | SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0, |
| 226 | NULL, 0); |
| 227 | if (error) |
| 228 | return (error); |
| 229 | if (SCARG(uap, osv)) { |
| 230 | compat_43_sigaction_to_sigvec(&osa, &osv); |
| 231 | error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); |
| 232 | if (error) |
| 233 | return (error); |
| 234 | } |
| 235 | return (0); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | /* ARGSUSED */ |
| 240 | int |
| 241 | compat_43_sys_killpg(struct lwp *l, const struct compat_43_sys_killpg_args *uap, register_t *retval) |
| 242 | { |
| 243 | /* { |
| 244 | syscallarg(int) pgid; |
| 245 | syscallarg(int) signum; |
| 246 | } */ |
| 247 | ksiginfo_t ksi; |
| 248 | int pgid = SCARG(uap, pgid); |
| 249 | |
| 250 | #ifdef COMPAT_09 |
| 251 | pgid &= 0xffff; |
| 252 | #endif |
| 253 | |
| 254 | if ((u_int)SCARG(uap, signum) >= NSIG) |
| 255 | return (EINVAL); |
| 256 | memset(&ksi, 0, sizeof(ksi)); |
| 257 | ksi.ksi_signo = SCARG(uap, signum); |
| 258 | ksi.ksi_code = SI_USER; |
| 259 | ksi.ksi_pid = l->l_proc->p_pid; |
| 260 | ksi.ksi_uid = kauth_cred_geteuid(l->l_cred); |
| 261 | return killpg1(l, &ksi, pgid, 0); |
| 262 | } |
| 263 | |