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