1 /* $NetBSD: kern_sig_43.c,v 1.30 2007/12/20 23:02:44 dsl 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 1.30 2007/12/20 23:02:44 dsl 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/syscallargs.h> 68 69 #include <sys/cpu.h> 70 71 #include <sys/user.h> /* for coredump */ 72 73 #include <compat/sys/signal.h> 74 75 void compat_43_sigmask_to_sigset(const int *, sigset_t *); 76 void compat_43_sigset_to_sigmask(const sigset_t *, int *); 77 void compat_43_sigvec_to_sigaction(const struct sigvec *, struct sigaction *); 78 void compat_43_sigaction_to_sigvec(const struct sigaction *, struct sigvec *); 79 void compat_43_sigstack_to_sigaltstack(const struct sigstack *, struct sigaltstack *); 80 void compat_43_sigaltstack_to_sigstack(const struct sigaltstack *, struct sigstack *); 81 82 void 83 compat_43_sigmask_to_sigset(const int *sm, sigset_t *ss) 84 { 85 86 ss->__bits[0] = *sm; 87 ss->__bits[1] = 0; 88 ss->__bits[2] = 0; 89 ss->__bits[3] = 0; 90 } 91 92 void 93 compat_43_sigset_to_sigmask(const sigset_t *ss, int *sm) 94 { 95 96 *sm = ss->__bits[0]; 97 } 98 99 void 100 compat_43_sigvec_to_sigaction(const struct sigvec *sv, 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 } 106 107 void 108 compat_43_sigaction_to_sigvec(const struct sigaction *sa, struct sigvec *sv) 109 { 110 sv->sv_handler = sa->sa_handler; 111 compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); 112 sv->sv_flags = sa->sa_flags ^ SA_RESTART; 113 } 114 115 void 116 compat_43_sigstack_to_sigaltstack(const struct sigstack *ss, struct sigaltstack *sa) 117 { 118 sa->ss_sp = ss->ss_sp; 119 sa->ss_size = SIGSTKSZ; /* Use the recommended size */ 120 sa->ss_flags = 0; 121 if (ss->ss_onstack) 122 sa->ss_flags |= SS_ONSTACK; 123 } 124 125 void 126 compat_43_sigaltstack_to_sigstack(const struct sigaltstack *sa, struct sigstack *ss) 127 { 128 ss->ss_sp = sa->ss_sp; 129 if (sa->ss_flags & SS_ONSTACK) 130 ss->ss_onstack = 1; 131 else 132 ss->ss_onstack = 0; 133 } 134 135 int 136 compat_43_sys_sigblock(struct lwp *l, const struct compat_43_sys_sigblock_args *uap, register_t *retval) 137 { 138 /* { 139 syscallarg(int) mask; 140 } */ 141 struct proc *p = l->l_proc; 142 int nsm, osm; 143 sigset_t nss, oss; 144 int error; 145 146 nsm = SCARG(uap, mask); 147 compat_43_sigmask_to_sigset(&nsm, &nss); 148 mutex_enter(&p->p_smutex); 149 error = sigprocmask1(l, SIG_BLOCK, &nss, &oss); 150 mutex_exit(&p->p_smutex); 151 if (error) 152 return (error); 153 compat_43_sigset_to_sigmask(&oss, &osm); 154 *retval = osm; 155 return (0); 156 } 157 158 int 159 compat_43_sys_sigsetmask(struct lwp *l, const struct compat_43_sys_sigsetmask_args *uap, register_t *retval) 160 { 161 /* { 162 syscallarg(int) mask; 163 } */ 164 struct proc *p = l->l_proc; 165 int nsm, osm; 166 sigset_t nss, oss; 167 int error; 168 169 nsm = SCARG(uap, mask); 170 compat_43_sigmask_to_sigset(&nsm, &nss); 171 mutex_enter(&p->p_smutex); 172 error = sigprocmask1(l, SIG_SETMASK, &nss, &oss); 173 mutex_exit(&p->p_smutex); 174 if (error) 175 return (error); 176 compat_43_sigset_to_sigmask(&oss, &osm); 177 *retval = osm; 178 return (0); 179 } 180 181 /* ARGSUSED */ 182 int 183 compat_43_sys_sigstack(struct lwp *l, const struct compat_43_sys_sigstack_args *uap, register_t *retval) 184 { 185 /* { 186 syscallarg(struct sigstack *) nss; 187 syscallarg(struct sigstack *) oss; 188 } */ 189 struct sigstack nss, oss; 190 struct sigaltstack nsa, osa; 191 int error; 192 193 if (SCARG(uap, nss)) { 194 error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); 195 if (error) 196 return (error); 197 compat_43_sigstack_to_sigaltstack(&nss, &nsa); 198 } 199 error = sigaltstack1(l, 200 SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); 201 if (error) 202 return (error); 203 if (SCARG(uap, oss)) { 204 compat_43_sigaltstack_to_sigstack(&osa, &oss); 205 error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); 206 if (error) 207 return (error); 208 } 209 return (0); 210 } 211 212 /* 213 * Generalized interface signal handler, 4.3-compatible. 214 */ 215 /* ARGSUSED */ 216 int 217 compat_43_sys_sigvec(struct lwp *l, const struct compat_43_sys_sigvec_args *uap, register_t *retval) 218 { 219 /* { 220 syscallarg(int) signum; 221 syscallarg(const struct sigvec *) nsv; 222 syscallarg(struct sigvec *) osv; 223 } */ 224 struct sigvec nsv, osv; 225 struct sigaction nsa, osa; 226 int error; 227 228 if (SCARG(uap, nsv)) { 229 error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); 230 if (error) 231 return (error); 232 compat_43_sigvec_to_sigaction(&nsv, &nsa); 233 } 234 error = sigaction1(l, SCARG(uap, signum), 235 SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0, 236 NULL, 0); 237 if (error) 238 return (error); 239 if (SCARG(uap, osv)) { 240 compat_43_sigaction_to_sigvec(&osa, &osv); 241 error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); 242 if (error) 243 return (error); 244 } 245 return (0); 246 } 247 248 249 /* ARGSUSED */ 250 int 251 compat_43_sys_killpg(struct lwp *l, const struct compat_43_sys_killpg_args *uap, register_t *retval) 252 { 253 /* { 254 syscallarg(int) pgid; 255 syscallarg(int) signum; 256 } */ 257 ksiginfo_t ksi; 258 int pgid = SCARG(uap, pgid); 259 260 #ifdef COMPAT_09 261 pgid &= 0xffff; 262 #endif 263 264 if ((u_int)SCARG(uap, signum) >= NSIG) 265 return (EINVAL); 266 memset(&ksi, 0, sizeof(ksi)); 267 ksi.ksi_signo = SCARG(uap, signum); 268 ksi.ksi_code = SI_USER; 269 ksi.ksi_pid = l->l_proc->p_pid; 270 ksi.ksi_uid = kauth_cred_geteuid(l->l_cred); 271 return killpg1(l, &ksi, pgid, 0); 272 } 273