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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95 30 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $ 31 */ 32 33 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 34 #define _SYS_SIGNALVAR_H_ 35 36 /* 37 * Don't bring in the entire bleeding include set if we aren't the kernel. 38 * Userland is not allowed to bring in sys/proc.h except under special 39 * circumstances (e.g. sys/user.h) 40 */ 41 #include <sys/signal.h> 42 #ifdef _KERNEL 43 #include <sys/proc.h> 44 #include <machine/lock.h> 45 #endif 46 47 /* 48 * Kernel signal definitions and data structures, 49 * not exported to user programs. 50 */ 51 52 /* 53 * Process signal actions and state, needed only within the process 54 * (not necessarily resident). 55 */ 56 struct sigacts { 57 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 58 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 59 sigset_t ps_sigignore; /* Signals being ignored. */ 60 sigset_t ps_sigcatch; /* Signals being caught by user. */ 61 sigset_t ps_sigonstack; /* signals to take on sigstack */ 62 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 63 sigset_t ps_sigreset; /* signals that reset when caught */ 64 sigset_t ps_signodefer; /* signals not masked while handled */ 65 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 66 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 67 unsigned int ps_refcnt; 68 int ps_flag; 69 }; 70 71 /* additional signal action values, used only temporarily/internally */ 72 #define SIG_CATCH ((__sighandler_t *)2) 73 #define SIG_HOLD ((__sighandler_t *)3) 74 75 #ifdef _KERNEL 76 77 /* 78 * get signal action for process and signal; currently only for current process 79 */ 80 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 81 82 #endif 83 84 /* 85 * sigset_t manipulation macros 86 */ 87 #define SIGADDSET(set, signo) \ 88 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 89 90 #define SIGDELSET(set, signo) \ 91 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 92 93 #define SIGEMPTYSET(set) \ 94 do { \ 95 int __i; \ 96 for (__i = 0; __i < _SIG_WORDS; __i++) \ 97 (set).__bits[__i] = 0; \ 98 } while (0) 99 100 #define SIGFILLSET(set) \ 101 do { \ 102 int __i; \ 103 for (__i = 0; __i < _SIG_WORDS; __i++) \ 104 (set).__bits[__i] = ~(unsigned int)0; \ 105 } while (0) 106 107 #define SIGISMEMBER(set, signo) \ 108 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 109 110 #define SIGISEMPTY(set) __sigisempty(&(set)) 111 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 112 113 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 114 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 115 116 #define SIGSETOR(set1, set2) \ 117 do { \ 118 int __i; \ 119 for (__i = 0; __i < _SIG_WORDS; __i++) \ 120 (set1).__bits[__i] |= (set2).__bits[__i]; \ 121 } while (0) 122 123 #define SIGSETAND(set1, set2) \ 124 do { \ 125 int __i; \ 126 for (__i = 0; __i < _SIG_WORDS; __i++) \ 127 (set1).__bits[__i] &= (set2).__bits[__i]; \ 128 } while (0) 129 130 #define SIGSETNAND(set1, set2) \ 131 do { \ 132 int __i; \ 133 for (__i = 0; __i < _SIG_WORDS; __i++) \ 134 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 135 } while (0) 136 137 #define SIG_CANTMASK(set) \ 138 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 139 140 #define SIG_STOPSIGMASK(set) \ 141 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 142 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 143 144 #define SIG_CONTSIGMASK(set) \ 145 SIGDELSET(set, SIGCONT) 146 147 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 148 149 static __inline int 150 __sigisempty(sigset_t *set) 151 { 152 int i; 153 154 for (i = 0; i < _SIG_WORDS; i++) { 155 if (set->__bits[i]) 156 return (0); 157 } 158 return (1); 159 } 160 161 static __inline int 162 __sigseteq(sigset_t *set1, sigset_t *set2) 163 { 164 int i; 165 166 for (i = 0; i < _SIG_WORDS; i++) { 167 if (set1->__bits[i] != set2->__bits[i]) 168 return (0); 169 } 170 return (1); 171 } 172 173 #ifdef _KERNEL 174 175 typedef void (*proc_func_t)(struct proc *); 176 177 struct pgrp; 178 struct proc; 179 struct sigio; 180 181 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 182 183 /* 184 * Machine-independent functions: 185 */ 186 void execsigs (struct proc *p); 187 void gsignal (int pgid, int sig); 188 int issignal (struct lwp *lp, int maytrace); 189 int iscaught (struct lwp *p); 190 void killproc (struct proc *p, char *why); 191 void pgsigio (struct sigio *, int signum, int checkctty); 192 void pgsignal (struct pgrp *pgrp, int sig, int checkctty); 193 void postsig (int sig); 194 void ksignal (struct proc *p, int sig); 195 void lwpsignal (struct proc *p, struct lwp *lp, int sig); 196 void siginit (struct proc *p); 197 void trapsignal (struct lwp *p, int sig, u_long code); 198 199 /* 200 * Machine-dependent functions: 201 */ 202 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code); 203 void sigexit (struct lwp *lp, int sig) __dead2; 204 int checkpoint_signal_handler(struct lwp *p); 205 206 #endif /* _KERNEL */ 207 208 #endif /* !_SYS_SIGNALVAR_H_ */ 209