kern_sig_43.c revision 1.31.2.1
1 /* $NetBSD: kern_sig_43.c,v 1.31.2.1 2008/05/16 02:23:34 yamt 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 1.31.2.1 2008/05/16 02:23:34 yamt 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/mount.h> 60 #include <sys/syscallargs.h> 61 62 #include <sys/cpu.h> 63 64 #include <sys/user.h> /* for coredump */ 65 66 #include <compat/sys/signal.h> 67 68 void compat_43_sigmask_to_sigset(const int *, sigset_t *); 69 void compat_43_sigset_to_sigmask(const sigset_t *, int *); 70 void compat_43_sigvec_to_sigaction(const struct sigvec *, struct sigaction *); 71 void compat_43_sigaction_to_sigvec(const struct sigaction *, struct sigvec *); 72 void compat_43_sigstack_to_sigaltstack(const struct sigstack *, struct sigaltstack *); 73 void compat_43_sigaltstack_to_sigstack(const struct sigaltstack *, struct sigstack *); 74 75 void 76 compat_43_sigmask_to_sigset(const int *sm, sigset_t *ss) 77 { 78 79 ss->__bits[0] = *sm; 80 ss->__bits[1] = 0; 81 ss->__bits[2] = 0; 82 ss->__bits[3] = 0; 83 } 84 85 void 86 compat_43_sigset_to_sigmask(const sigset_t *ss, int *sm) 87 { 88 89 *sm = ss->__bits[0]; 90 } 91 92 void 93 compat_43_sigvec_to_sigaction(const struct sigvec *sv, struct sigaction *sa) 94 { 95 sa->sa_handler = sv->sv_handler; 96 compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask); 97 sa->sa_flags = sv->sv_flags ^ SA_RESTART; 98 } 99 100 void 101 compat_43_sigaction_to_sigvec(const struct sigaction *sa, struct sigvec *sv) 102 { 103 sv->sv_handler = sa->sa_handler; 104 compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); 105 sv->sv_flags = sa->sa_flags ^ SA_RESTART; 106 } 107 108 void 109 compat_43_sigstack_to_sigaltstack(const struct sigstack *ss, struct sigaltstack *sa) 110 { 111 sa->ss_sp = ss->ss_sp; 112 sa->ss_size = SIGSTKSZ; /* Use the recommended size */ 113 sa->ss_flags = 0; 114 if (ss->ss_onstack) 115 sa->ss_flags |= SS_ONSTACK; 116 } 117 118 void 119 compat_43_sigaltstack_to_sigstack(const struct sigaltstack *sa, struct sigstack *ss) 120 { 121 ss->ss_sp = sa->ss_sp; 122 if (sa->ss_flags & SS_ONSTACK) 123 ss->ss_onstack = 1; 124 else 125 ss->ss_onstack = 0; 126 } 127 128 int 129 compat_43_sys_sigblock(struct lwp *l, const struct compat_43_sys_sigblock_args *uap, register_t *retval) 130 { 131 /* { 132 syscallarg(int) mask; 133 } */ 134 struct proc *p = l->l_proc; 135 int nsm, osm; 136 sigset_t nss, oss; 137 int error; 138 139 nsm = SCARG(uap, mask); 140 compat_43_sigmask_to_sigset(&nsm, &nss); 141 mutex_enter(p->p_lock); 142 error = sigprocmask1(l, SIG_BLOCK, &nss, &oss); 143 mutex_exit(p->p_lock); 144 if (error) 145 return (error); 146 compat_43_sigset_to_sigmask(&oss, &osm); 147 *retval = osm; 148 return (0); 149 } 150 151 int 152 compat_43_sys_sigsetmask(struct lwp *l, const struct compat_43_sys_sigsetmask_args *uap, register_t *retval) 153 { 154 /* { 155 syscallarg(int) mask; 156 } */ 157 struct proc *p = l->l_proc; 158 int nsm, osm; 159 sigset_t nss, oss; 160 int error; 161 162 nsm = SCARG(uap, mask); 163 compat_43_sigmask_to_sigset(&nsm, &nss); 164 mutex_enter(p->p_lock); 165 error = sigprocmask1(l, SIG_SETMASK, &nss, &oss); 166 mutex_exit(p->p_lock); 167 if (error) 168 return (error); 169 compat_43_sigset_to_sigmask(&oss, &osm); 170 *retval = osm; 171 return (0); 172 } 173 174 /* ARGSUSED */ 175 int 176 compat_43_sys_sigstack(struct lwp *l, const struct compat_43_sys_sigstack_args *uap, register_t *retval) 177 { 178 /* { 179 syscallarg(struct sigstack *) nss; 180 syscallarg(struct sigstack *) oss; 181 } */ 182 struct sigstack nss, oss; 183 struct sigaltstack nsa, osa; 184 int error; 185 186 if (SCARG(uap, nss)) { 187 error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); 188 if (error) 189 return (error); 190 compat_43_sigstack_to_sigaltstack(&nss, &nsa); 191 } 192 error = sigaltstack1(l, 193 SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); 194 if (error) 195 return (error); 196 if (SCARG(uap, oss)) { 197 compat_43_sigaltstack_to_sigstack(&osa, &oss); 198 error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); 199 if (error) 200 return (error); 201 } 202 return (0); 203 } 204 205 /* 206 * Generalized interface signal handler, 4.3-compatible. 207 */ 208 /* ARGSUSED */ 209 int 210 compat_43_sys_sigvec(struct lwp *l, const struct compat_43_sys_sigvec_args *uap, register_t *retval) 211 { 212 /* { 213 syscallarg(int) signum; 214 syscallarg(const struct sigvec *) nsv; 215 syscallarg(struct sigvec *) osv; 216 } */ 217 struct sigvec nsv, osv; 218 struct sigaction nsa, osa; 219 int error; 220 221 if (SCARG(uap, nsv)) { 222 error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); 223 if (error) 224 return (error); 225 compat_43_sigvec_to_sigaction(&nsv, &nsa); 226 } 227 error = sigaction1(l, SCARG(uap, signum), 228 SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0, 229 NULL, 0); 230 if (error) 231 return (error); 232 if (SCARG(uap, osv)) { 233 compat_43_sigaction_to_sigvec(&osa, &osv); 234 error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); 235 if (error) 236 return (error); 237 } 238 return (0); 239 } 240 241 242 /* ARGSUSED */ 243 int 244 compat_43_sys_killpg(struct lwp *l, const struct compat_43_sys_killpg_args *uap, register_t *retval) 245 { 246 /* { 247 syscallarg(int) pgid; 248 syscallarg(int) signum; 249 } */ 250 ksiginfo_t ksi; 251 int pgid = SCARG(uap, pgid); 252 253 #ifdef COMPAT_09 254 pgid &= 0xffff; 255 #endif 256 257 if ((u_int)SCARG(uap, signum) >= NSIG) 258 return (EINVAL); 259 memset(&ksi, 0, sizeof(ksi)); 260 ksi.ksi_signo = SCARG(uap, signum); 261 ksi.ksi_code = SI_USER; 262 ksi.ksi_pid = l->l_proc->p_pid; 263 ksi.ksi_uid = kauth_cred_geteuid(l->l_cred); 264 return killpg1(l, &ksi, pgid, 0); 265 } 266
Indexes created Wed Oct 15 07:09:58 GMT 2025