signalvar.h revision 58755
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: head/sys/sys/signalvar.h 58755 2000-03-28 18:06:49Z dillon $ 35 */ 36 37#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ 38#define _SYS_SIGNALVAR_H_ 39 40#include <sys/signal.h> 41#include <sys/proc.h> 42#include <machine/smp.h> 43 44/* 45 * Kernel signal definitions and data structures, 46 * not exported to user programs. 47 */ 48 49/* 50 * Process signal actions and state, needed only within the process 51 * (not necessarily resident). 52 */ 53struct sigacts { 54 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */ 55 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */ 56 sigset_t ps_sigonstack; /* signals to take on sigstack */ 57 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 58 sigset_t ps_sigreset; /* signals that reset when caught */ 59 sigset_t ps_signodefer; /* signals not masked while handled */ 60 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 61 sigset_t ps_osigset; /* signals that use osigset_t */ 62 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 63}; 64 65/* 66 * Compatibility. 67 */ 68typedef struct { 69 struct osigcontext si_sc; 70 int si_signo; 71 int si_code; 72 union sigval si_value; 73} osiginfo_t; 74 75struct osigaction { 76 union { 77 void (*__sa_handler) __P((int)); 78 void (*__sa_sigaction) __P((int, osiginfo_t *, void *)); 79 } __sigaction_u; /* signal handler */ 80 osigset_t sa_mask; /* signal mask to apply */ 81 int sa_flags; /* see signal options below */ 82}; 83 84typedef void __osiginfohandler_t __P((int, osiginfo_t *, void *)); 85 86/* additional signal action values, used only temporarily/internally */ 87#define SIG_CATCH ((__sighandler_t *)2) 88#define SIG_HOLD ((__sighandler_t *)3) 89 90/* 91 * get signal action for process and signal; currently only for current process 92 */ 93#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 94 95/* 96 * sigset_t manipulation macros 97 */ 98#define SIGADDSET(set, signo) \ 99 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 100 101#define SIGDELSET(set, signo) \ 102 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 103 104#define SIGEMPTYSET(set) \ 105 do { \ 106 int __i; \ 107 for (__i = 0; __i < _SIG_WORDS; __i++) \ 108 (set).__bits[__i] = 0; \ 109 } while (0) 110 111#define SIGFILLSET(set) \ 112 do { \ 113 int __i; \ 114 for (__i = 0; __i < _SIG_WORDS; __i++) \ 115 (set).__bits[__i] = ~(unsigned int)0; \ 116 } while (0) 117 118#define SIGISMEMBER(set, signo) \ 119 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 120 121#define SIGISEMPTY(set) __sigisempty(&(set)) 122#define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 123 124#define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 125#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 126 127#define SIGSETOR(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 SIGSETAND(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 SIGSETNAND(set1, set2) \ 142 do { \ 143 int __i; \ 144 for (__i = 0; __i < _SIG_WORDS; __i++) \ 145 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 146 } while (0) 147 148#define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0]) 149#define SIGSETOLD(set, oset) ((set).__bits[0] = (oset)) 150 151#define SIG_CANTMASK(set) \ 152 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 153 154#define SIG_STOPSIGMASK(set) \ 155 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 156 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 157 158#define SIG_CONTSIGMASK(set) \ 159 SIGDELSET(set, SIGCONT) 160 161#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 162 163#define SIG2OSIG(sig, osig) osig = (sig).__bits[0] 164#define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig 165 166static __inline int 167__sigisempty(sigset_t *set) 168{ 169 int i; 170 171 for (i = 0; i < _SIG_WORDS; i++) { 172 if (set->__bits[i]) 173 return (0); 174 } 175 return (1); 176} 177 178static __inline int 179__sigseteq(sigset_t *set1, sigset_t *set2) 180{ 181 int i; 182 183 for (i = 0; i < _SIG_WORDS; i++) { 184 if (set1->__bits[i] != set2->__bits[i]) 185 return (0); 186 } 187 return (1); 188} 189 190#ifdef _KERNEL 191 192struct pgrp; 193struct proc; 194struct sigio; 195 196extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 197 198/* 199 * Machine-independent functions: 200 */ 201void check_sigacts __P((void)); 202void execsigs __P((struct proc *p)); 203void gsignal __P((int pgid, int sig)); 204int issignal __P((struct proc *p)); 205void killproc __P((struct proc *p, char *why)); 206void pgsigio __P((struct sigio *, int signum, int checkctty)); 207void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty)); 208void postsig __P((int sig)); 209void psignal __P((struct proc *p, int sig)); 210void sigexit __P((struct proc *p, int signum)); 211void siginit __P((struct proc *p)); 212void trapsignal __P((struct proc *p, int sig, u_long code)); 213int __cursig __P((struct proc *p)); 214 215/* 216 * Machine-dependent functions: 217 */ 218void sendsig __P((sig_t action, int sig, sigset_t *retmask, u_long code)); 219 220/* 221 * Inline functions: 222 */ 223#define CURSIG(p) __cursig(p) 224 225/* 226 * Determine signal that should be delivered to process p, the current 227 * process, 0 if none. If there is a pending stop signal with default 228 * action, the process stops in issignal(). 229 * 230 * MP SAFE 231 */ 232extern __inline int __cursig(struct proc *p) 233{ 234 sigset_t tmpset; 235 int r; 236 237 tmpset = p->p_siglist; 238 SIGSETNAND(tmpset, p->p_sigmask); 239 if (SIGISEMPTY(p->p_siglist) || 240 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) { 241 return(0); 242 } 243 get_mplock(); 244 r = issignal(p); 245 rel_mplock(); 246 return(r); 247} 248 249#endif /* _KERNEL */ 250 251#endif /* !_SYS_SIGNALVAR_H_ */ 252