1 /* 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)signalvar.h 7.5 (Berkeley) 04/20/92 8 */ 9 10 #ifndef _SIGNALVAR_H_ /* tmp for user.h */ 11 #define _SIGNALVAR_H_ 12 13 /* 14 * Kernel signal definitions and data structures, 15 * not exported to user programs. 16 */ 17 18 /* 19 * Process signal actions and state, needed only within the process 20 * (not necessarily resident). 21 */ 22 struct sigacts { 23 sig_t ps_sigact[NSIG]; /* disposition of signals */ 24 sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ 25 sigset_t ps_sigonstack; /* signals to take on sigstack */ 26 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 27 sigset_t ps_oldmask; /* saved mask from before sigpause */ 28 int ps_flags; /* signal flags, below */ 29 struct sigaltstack ps_sigstk; /* sp & on stack state variable */ 30 int ps_sig; /* for core dump/debugger XXX */ 31 int ps_code; /* for core dump/debugger XXX */ 32 int ps_addr; /* for core dump/debugger XXX */ 33 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */ 34 }; 35 36 /* signal flags */ 37 #define SAS_OLDMASK 0x01 /* need to restore mask before pause */ 38 #define SAS_ALTSTACK 0x02 /* have alternate signal stack */ 39 40 /* additional signal action values, used only temporarily/internally */ 41 #define SIG_CATCH (void (*)())2 42 #define SIG_HOLD (void (*)())3 43 44 /* 45 * get signal action for process and signal; currently only for current process 46 */ 47 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)]) 48 49 /* 50 * Determine signal that should be delivered to process p, the current process, 51 * 0 if none. If there is a pending stop signal with default action, 52 * the process stops in issig(). 53 */ 54 #define CURSIG(p) \ 55 (((p)->p_sig == 0 || \ 56 ((p)->p_flag&STRC) == 0 && ((p)->p_sig &~ (p)->p_sigmask) == 0) ? \ 57 0 : issig(p)) 58 59 /* 60 * Clear a pending signal from a process. 61 */ 62 #define CLRSIG(p, sig) { (p)->p_sig &= ~sigmask(sig); } 63 64 /* 65 * Signal properties and actions. 66 * The array below categorizes the signals and their default actions 67 * according to the following properties: 68 */ 69 #define SA_KILL 0x01 /* terminates process by default */ 70 #define SA_CORE 0x02 /* ditto and coredumps */ 71 #define SA_STOP 0x04 /* suspend process */ 72 #define SA_TTYSTOP 0x08 /* ditto, from tty */ 73 #define SA_IGNORE 0x10 /* ignore by default */ 74 #define SA_CONT 0x20 /* continue if suspended */ 75 #define SA_CANTMASK 0x40 /* non-maskable, catchable */ 76 77 #ifdef SIGPROP 78 int sigprop[NSIG + 1] = { 79 0, /* unused */ 80 SA_KILL, /* SIGHUP */ 81 SA_KILL, /* SIGINT */ 82 SA_KILL|SA_CORE, /* SIGQUIT */ 83 SA_KILL|SA_CORE, /* SIGILL */ 84 SA_KILL|SA_CORE, /* SIGTRAP */ 85 SA_KILL|SA_CORE, /* SIGABRT */ 86 SA_KILL|SA_CORE, /* SIGEMT */ 87 SA_KILL|SA_CORE, /* SIGFPE */ 88 SA_KILL, /* SIGKILL */ 89 SA_KILL|SA_CORE, /* SIGBUS */ 90 SA_KILL|SA_CORE, /* SIGSEGV */ 91 SA_KILL|SA_CORE, /* SIGSYS */ 92 SA_KILL, /* SIGPIPE */ 93 SA_KILL, /* SIGALRM */ 94 SA_KILL, /* SIGTERM */ 95 SA_IGNORE, /* SIGURG */ 96 SA_STOP, /* SIGSTOP */ 97 SA_STOP|SA_TTYSTOP, /* SIGTSTP */ 98 SA_IGNORE|SA_CONT, /* SIGCONT */ 99 SA_IGNORE, /* SIGCHLD */ 100 SA_STOP|SA_TTYSTOP, /* SIGTTIN */ 101 SA_STOP|SA_TTYSTOP, /* SIGTTOU */ 102 SA_IGNORE, /* SIGIO */ 103 SA_KILL, /* SIGXCPU */ 104 SA_KILL, /* SIGXFSZ */ 105 SA_KILL, /* SIGVTALRM */ 106 SA_KILL, /* SIGPROF */ 107 SA_IGNORE, /* SIGWINCH */ 108 SA_IGNORE, /* SIGINFO */ 109 SA_KILL, /* SIGUSR1 */ 110 SA_KILL, /* SIGUSR2 */ 111 }; 112 113 #define stopsigmask (sigmask(SIGSTOP)|sigmask(SIGTSTP)|\ 114 sigmask(SIGTTIN)|sigmask(SIGTTOU)) 115 #define contsigmask (sigmask(SIGCONT)) 116 117 #endif /* SIGPROP */ 118 119 #define sigcantmask (sigmask(SIGKILL)|sigmask(SIGSTOP)) 120 121 #ifdef KERNEL 122 /* 123 * Machine-independent functions: 124 */ 125 void siginit __P((struct proc *p)); 126 void execsigs __P((struct proc *p)); 127 void gsignal __P((int pgid, int sig)); 128 void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty)); 129 void trapsignal __P((struct proc *p, int sig, unsigned code)); 130 void psignal __P((struct proc *p, int sig)); 131 int issig __P((struct proc *p)); 132 void psig __P((int sig)); 133 int coredump __P((struct proc *p)); 134 135 /* 136 * Machine-dependent functions: 137 */ 138 void sendsig __P((sig_t action, int sig, int returnmask, unsigned code)); 139 #endif /* KERNEL */ 140 #endif /* !_SIGNALVAR_H_ */ 141