1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95 34 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $ 35 * $DragonFly: src/sys/sys/signalvar.h,v 1.7 2003/10/24 14:10:46 daver Exp $ 36 */ 37 38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 39 #define _SYS_SIGNALVAR_H_ 40 41 #include <sys/signal.h> 42 #include <sys/proc.h> 43 #include <machine/lock.h> 44 45 /* 46 * Kernel signal definitions and data structures, 47 * not exported to user programs. 48 */ 49 50 /* 51 * Process signal actions and state, needed only within the process 52 * (not necessarily resident). 53 */ 54 struct sigacts { 55 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 56 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 57 sigset_t ps_sigonstack; /* signals to take on sigstack */ 58 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 59 sigset_t ps_sigreset; /* signals that reset when caught */ 60 sigset_t ps_signodefer; /* signals not masked while handled */ 61 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 62 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 63 }; 64 65 /* additional signal action values, used only temporarily/internally */ 66 #define SIG_CATCH ((__sighandler_t *)2) 67 #define SIG_HOLD ((__sighandler_t *)3) 68 69 /* 70 * get signal action for process and signal; currently only for current process 71 */ 72 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 73 74 /* 75 * sigset_t manipulation macros 76 */ 77 #define SIGADDSET(set, signo) \ 78 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 79 80 #define SIGDELSET(set, signo) \ 81 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 82 83 #define SIGEMPTYSET(set) \ 84 do { \ 85 int __i; \ 86 for (__i = 0; __i < _SIG_WORDS; __i++) \ 87 (set).__bits[__i] = 0; \ 88 } while (0) 89 90 #define SIGFILLSET(set) \ 91 do { \ 92 int __i; \ 93 for (__i = 0; __i < _SIG_WORDS; __i++) \ 94 (set).__bits[__i] = ~(unsigned int)0; \ 95 } while (0) 96 97 #define SIGISMEMBER(set, signo) \ 98 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 99 100 #define SIGISEMPTY(set) __sigisempty(&(set)) 101 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 102 103 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 104 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 105 106 #define SIGSETOR(set1, set2) \ 107 do { \ 108 int __i; \ 109 for (__i = 0; __i < _SIG_WORDS; __i++) \ 110 (set1).__bits[__i] |= (set2).__bits[__i]; \ 111 } while (0) 112 113 #define SIGSETAND(set1, set2) \ 114 do { \ 115 int __i; \ 116 for (__i = 0; __i < _SIG_WORDS; __i++) \ 117 (set1).__bits[__i] &= (set2).__bits[__i]; \ 118 } while (0) 119 120 #define SIGSETNAND(set1, set2) \ 121 do { \ 122 int __i; \ 123 for (__i = 0; __i < _SIG_WORDS; __i++) \ 124 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 125 } while (0) 126 127 #define SIG_CANTMASK(set) \ 128 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 129 130 #define SIG_STOPSIGMASK(set) \ 131 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 132 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 133 134 #define SIG_CONTSIGMASK(set) \ 135 SIGDELSET(set, SIGCONT) 136 137 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 138 139 static __inline int 140 __sigisempty(sigset_t *set) 141 { 142 int i; 143 144 for (i = 0; i < _SIG_WORDS; i++) { 145 if (set->__bits[i]) 146 return (0); 147 } 148 return (1); 149 } 150 151 static __inline int 152 __sigseteq(sigset_t *set1, sigset_t *set2) 153 { 154 int i; 155 156 for (i = 0; i < _SIG_WORDS; i++) { 157 if (set1->__bits[i] != set2->__bits[i]) 158 return (0); 159 } 160 return (1); 161 } 162 163 #ifdef _KERNEL 164 165 typedef void (*proc_func_t)(struct proc *); 166 167 struct pgrp; 168 struct proc; 169 struct sigio; 170 171 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 172 173 /* 174 * Machine-independent functions: 175 */ 176 void check_sigacts (void); 177 void execsigs (struct proc *p); 178 void gsignal (int pgid, int sig); 179 int issignal (struct proc *p); 180 void killproc (struct proc *p, char *why); 181 void pgsigio (struct sigio *, int signum, int checkctty); 182 void pgsignal (struct pgrp *pgrp, int sig, int checkctty); 183 void postsig (int sig); 184 void psignal (struct proc *p, int sig); 185 void siginit (struct proc *p); 186 void trapsignal (struct proc *p, int sig, u_long code); 187 int __cursig (struct proc *p); 188 proc_func_t register_ckpt_func(proc_func_t func); 189 190 191 /* 192 * Machine-dependent functions: 193 */ 194 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code); 195 void sigexit (struct proc *p, int sig); 196 197 /* 198 * Inline functions: 199 */ 200 #define CURSIG(p) __cursig(p) 201 202 /* 203 * Determine signal that should be delivered to process p, the current 204 * process, 0 if none. If there is a pending stop signal with default 205 * action, the process stops in issignal(). 206 * 207 * MP SAFE 208 */ 209 extern __inline int __cursig(struct proc *p) 210 { 211 sigset_t tmpset; 212 int r; 213 214 tmpset = p->p_siglist; 215 SIGSETNAND(tmpset, p->p_sigmask); 216 if (SIGISEMPTY(p->p_siglist) || 217 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) { 218 return(0); 219 } 220 r = issignal(p); 221 return(r); 222 } 223 224 #endif /* _KERNEL */ 225 226 #endif /* !_SYS_SIGNALVAR_H_ */ 227