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 */ 36 37 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 38 #define _SYS_SIGNALVAR_H_ 39 40 /* 41 * Don't bring in the entire bleeding include set if we aren't the kernel. 42 * Userland is not allowed to bring in sys/proc.h except under special 43 * circumstances (e.g. sys/user.h) 44 */ 45 #include <sys/signal.h> 46 #ifdef _KERNEL 47 #include <sys/proc.h> 48 #include <machine/lock.h> 49 #endif 50 51 /* 52 * Kernel signal definitions and data structures, 53 * not exported to user programs. 54 */ 55 56 /* 57 * Process signal actions and state, needed only within the process 58 * (not necessarily resident). 59 */ 60 struct sigacts { 61 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 62 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 63 sigset_t ps_sigignore; /* Signals being ignored. */ 64 sigset_t ps_sigcatch; /* Signals being caught by user. */ 65 sigset_t ps_sigonstack; /* signals to take on sigstack */ 66 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 67 sigset_t ps_sigreset; /* signals that reset when caught */ 68 sigset_t ps_signodefer; /* signals not masked while handled */ 69 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 70 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 71 unsigned int ps_refcnt; 72 int ps_flag; 73 }; 74 75 /* additional signal action values, used only temporarily/internally */ 76 #define SIG_CATCH ((__sighandler_t *)2) 77 #define SIG_HOLD ((__sighandler_t *)3) 78 79 #ifdef _KERNEL 80 81 /* 82 * get signal action for process and signal; currently only for current process 83 */ 84 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 85 86 #endif 87 88 /* 89 * sigset_t manipulation macros 90 */ 91 #define SIGADDSET(set, signo) \ 92 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 93 94 #define SIGDELSET(set, signo) \ 95 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 96 97 #define SIGEMPTYSET(set) \ 98 do { \ 99 int __i; \ 100 for (__i = 0; __i < _SIG_WORDS; __i++) \ 101 (set).__bits[__i] = 0; \ 102 } while (0) 103 104 #define SIGFILLSET(set) \ 105 do { \ 106 int __i; \ 107 for (__i = 0; __i < _SIG_WORDS; __i++) \ 108 (set).__bits[__i] = ~(unsigned int)0; \ 109 } while (0) 110 111 #define SIGISMEMBER(set, signo) \ 112 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 113 114 #define SIGISEMPTY(set) __sigisempty(&(set)) 115 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 116 117 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 118 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 119 120 #define SIGSETOR(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 SIGSETAND(set1, set2) \ 128 do { \ 129 int __i; \ 130 for (__i = 0; __i < _SIG_WORDS; __i++) \ 131 (set1).__bits[__i] &= (set2).__bits[__i]; \ 132 } while (0) 133 134 #define SIGSETNAND(set1, set2) \ 135 do { \ 136 int __i; \ 137 for (__i = 0; __i < _SIG_WORDS; __i++) \ 138 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 139 } while (0) 140 141 #define SIG_CANTMASK(set) \ 142 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 143 144 #define SIG_STOPSIGMASK(set) \ 145 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 146 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 147 148 #define SIG_CONTSIGMASK(set) \ 149 SIGDELSET(set, SIGCONT) 150 151 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 152 153 static __inline int 154 __sigisempty(sigset_t *set) 155 { 156 int i; 157 158 for (i = 0; i < _SIG_WORDS; i++) { 159 if (set->__bits[i]) 160 return (0); 161 } 162 return (1); 163 } 164 165 static __inline int 166 __sigseteq(sigset_t *set1, sigset_t *set2) 167 { 168 int i; 169 170 for (i = 0; i < _SIG_WORDS; i++) { 171 if (set1->__bits[i] != set2->__bits[i]) 172 return (0); 173 } 174 return (1); 175 } 176 177 #ifdef _KERNEL 178 179 typedef void (*proc_func_t)(struct proc *); 180 181 struct pgrp; 182 struct proc; 183 struct sigio; 184 185 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 186 187 /* 188 * Machine-independent functions: 189 */ 190 void execsigs (struct proc *p); 191 void gsignal (int pgid, int sig); 192 int issignal (struct lwp *lp, int maytrace); 193 int iscaught (struct lwp *p); 194 void killproc (struct proc *p, char *why); 195 void pgsigio (struct sigio *, int signum, int checkctty); 196 void pgsignal (struct pgrp *pgrp, int sig, int checkctty); 197 void postsig (int sig); 198 void ksignal (struct proc *p, int sig); 199 void lwpsignal (struct proc *p, struct lwp *lp, int sig); 200 void siginit (struct proc *p); 201 void trapsignal (struct lwp *p, int sig, u_long code); 202 203 /* 204 * Machine-dependent functions: 205 */ 206 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code); 207 void sigexit (struct lwp *lp, int sig); 208 int checkpoint_signal_handler(struct lwp *p); 209 210 #endif /* _KERNEL */ 211 212 #endif /* !_SYS_SIGNALVAR_H_ */ 213