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 1.4 2003/07/06 21:23:54 dillon 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_osigset; /* signals that use osigset_t */ 63 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 64 }; 65 66 /* 67 * Compatibility. 68 */ 69 typedef struct { 70 struct osigcontext si_sc; 71 int si_signo; 72 int si_code; 73 union sigval si_value; 74 } osiginfo_t; 75 76 struct osigaction { 77 union { 78 void (*__sa_handler) __P((int)); 79 void (*__sa_sigaction) __P((int, osiginfo_t *, void *)); 80 } __sigaction_u; /* signal handler */ 81 osigset_t sa_mask; /* signal mask to apply */ 82 int sa_flags; /* see signal options below */ 83 }; 84 85 typedef void __osiginfohandler_t __P((int, osiginfo_t *, void *)); 86 87 /* additional signal action values, used only temporarily/internally */ 88 #define SIG_CATCH ((__sighandler_t *)2) 89 #define SIG_HOLD ((__sighandler_t *)3) 90 91 /* 92 * get signal action for process and signal; currently only for current process 93 */ 94 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)]) 95 96 /* 97 * sigset_t manipulation macros 98 */ 99 #define SIGADDSET(set, signo) \ 100 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo) 101 102 #define SIGDELSET(set, signo) \ 103 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo) 104 105 #define SIGEMPTYSET(set) \ 106 do { \ 107 int __i; \ 108 for (__i = 0; __i < _SIG_WORDS; __i++) \ 109 (set).__bits[__i] = 0; \ 110 } while (0) 111 112 #define SIGFILLSET(set) \ 113 do { \ 114 int __i; \ 115 for (__i = 0; __i < _SIG_WORDS; __i++) \ 116 (set).__bits[__i] = ~(unsigned int)0; \ 117 } while (0) 118 119 #define SIGISMEMBER(set, signo) \ 120 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) 121 122 #define SIGISEMPTY(set) __sigisempty(&(set)) 123 #define SIGNOTEMPTY(set) (!__sigisempty(&(set))) 124 125 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2)) 126 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2))) 127 128 #define SIGSETOR(set1, set2) \ 129 do { \ 130 int __i; \ 131 for (__i = 0; __i < _SIG_WORDS; __i++) \ 132 (set1).__bits[__i] |= (set2).__bits[__i]; \ 133 } while (0) 134 135 #define SIGSETAND(set1, set2) \ 136 do { \ 137 int __i; \ 138 for (__i = 0; __i < _SIG_WORDS; __i++) \ 139 (set1).__bits[__i] &= (set2).__bits[__i]; \ 140 } while (0) 141 142 #define SIGSETNAND(set1, set2) \ 143 do { \ 144 int __i; \ 145 for (__i = 0; __i < _SIG_WORDS; __i++) \ 146 (set1).__bits[__i] &= ~(set2).__bits[__i]; \ 147 } while (0) 148 149 #define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0]) 150 #define SIGSETOLD(set, oset) ((set).__bits[0] = (oset)) 151 152 #define SIG_CANTMASK(set) \ 153 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP) 154 155 #define SIG_STOPSIGMASK(set) \ 156 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \ 157 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU) 158 159 #define SIG_CONTSIGMASK(set) \ 160 SIGDELSET(set, SIGCONT) 161 162 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) 163 164 #define SIG2OSIG(sig, osig) osig = (sig).__bits[0] 165 #define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig 166 167 static __inline int 168 __sigisempty(sigset_t *set) 169 { 170 int i; 171 172 for (i = 0; i < _SIG_WORDS; i++) { 173 if (set->__bits[i]) 174 return (0); 175 } 176 return (1); 177 } 178 179 static __inline int 180 __sigseteq(sigset_t *set1, sigset_t *set2) 181 { 182 int i; 183 184 for (i = 0; i < _SIG_WORDS; i++) { 185 if (set1->__bits[i] != set2->__bits[i]) 186 return (0); 187 } 188 return (1); 189 } 190 191 #ifdef _KERNEL 192 193 struct pgrp; 194 struct proc; 195 struct sigio; 196 197 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */ 198 199 /* 200 * Machine-independent functions: 201 */ 202 void check_sigacts __P((void)); 203 void execsigs __P((struct proc *p)); 204 void gsignal __P((int pgid, int sig)); 205 int issignal __P((struct proc *p)); 206 void killproc __P((struct proc *p, char *why)); 207 void pgsigio __P((struct sigio *, int signum, int checkctty)); 208 void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty)); 209 void postsig __P((int sig)); 210 void psignal __P((struct proc *p, int sig)); 211 void siginit __P((struct proc *p)); 212 void trapsignal __P((struct proc *p, int sig, u_long code)); 213 int __cursig __P((struct proc *p)); 214 215 /* 216 * Machine-dependent functions: 217 */ 218 void sendsig __P((sig_t action, int sig, sigset_t *retmask, u_long code)); 219 void sigexit __P((struct proc *p, int sig)); 220 221 /* 222 * Inline functions: 223 */ 224 #define CURSIG(p) __cursig(p) 225 226 /* 227 * Determine signal that should be delivered to process p, the current 228 * process, 0 if none. If there is a pending stop signal with default 229 * action, the process stops in issignal(). 230 * 231 * MP SAFE 232 */ 233 extern __inline int __cursig(struct proc *p) 234 { 235 sigset_t tmpset; 236 int r; 237 238 tmpset = p->p_siglist; 239 SIGSETNAND(tmpset, p->p_sigmask); 240 if (SIGISEMPTY(p->p_siglist) || 241 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) { 242 return(0); 243 } 244 r = issignal(p); 245 return(r); 246 } 247 248 #endif /* _KERNEL */ 249 250 #endif /* !_SYS_SIGNALVAR_H_ */ 251