2 * Copyright (c) 1991, 1993
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33 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95
37 #ifndef _SYS_SIGNALVAR_H_
38 #define _SYS_SIGNALVAR_H_
40 #include <sys/signal.h>
43 * Kernel signal definitions and data structures,
44 * not exported to user programs.
48 * Process signal actions and state, needed only within the process
49 * (not necessarily resident).
52 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
53 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
54 sigset_t ps_sigonstack; /* signals to take on sigstack */
55 sigset_t ps_sigintr; /* signals that interrupt syscalls */
56 sigset_t ps_sigreset; /* signals that reset when caught */
57 sigset_t ps_signodefer; /* signals not masked while handled */
58 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
59 sigset_t ps_osigset; /* signals that use osigset_t */
60 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
67 struct osigcontext si_sc;
70 union sigval si_value;
75 void (*__sa_handler) __P((int));
76 void (*__sa_sigaction) __P((int, osiginfo_t *, void *));
77 } __sigaction_u; /* signal handler */
78 osigset_t sa_mask; /* signal mask to apply */
79 int sa_flags; /* see signal options below */
82 typedef void __osiginfohandler_t __P((int, osiginfo_t *, void *));
84 /* additional signal action values, used only temporarily/internally */
85 #define SIG_CATCH ((__sighandler_t *)2)
86 #define SIG_HOLD ((__sighandler_t *)3)
89 * get signal action for process and signal; currently only for current process
91 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
94 * sigset_t manipulation macros
96 #define SIGADDSET(set, signo) \
97 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
99 #define SIGDELSET(set, signo) \
100 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
102 #define SIGEMPTYSET(set) \
105 for (__i = 0; __i < _SIG_WORDS; __i++) \
106 (set).__bits[__i] = 0; \
109 #define SIGFILLSET(set) \
112 for (__i = 0; __i < _SIG_WORDS; __i++) \
113 (set).__bits[__i] = ~0U; \
116 #define SIGISMEMBER(set, signo) \
117 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
119 #define SIGISEMPTY(set) __sigisempty(&(set))
120 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
122 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
123 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
125 #define SIGSETOR(set1, set2) \
128 for (__i = 0; __i < _SIG_WORDS; __i++) \
129 (set1).__bits[__i] |= (set2).__bits[__i]; \
132 #define SIGSETAND(set1, set2) \
135 for (__i = 0; __i < _SIG_WORDS; __i++) \
136 (set1).__bits[__i] &= (set2).__bits[__i]; \
139 #define SIGSETNAND(set1, set2) \
142 for (__i = 0; __i < _SIG_WORDS; __i++) \
143 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
146 #define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
147 #define SIGSETOLD(set, oset) ((set).__bits[0] = (oset))
149 #define SIG_CANTMASK(set) \
150 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
152 #define SIG_STOPSIGMASK(set) \
153 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
154 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
156 #define SIG_CONTSIGMASK(set) \
157 SIGDELSET(set, SIGCONT)
159 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
161 #define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
162 #define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
165 __sigisempty(sigset_t *set)
169 for (i = 0; i < _SIG_WORDS; i++) {
177 __sigseteq(sigset_t *set1, sigset_t *set2)
181 for (i = 0; i < _SIG_WORDS; i++) {
182 if (set1->__bits[i] != set2->__bits[i])
195 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
198 * Machine-independent functions:
200 int CURSIG(struct proc *p);
201 void execsigs __P((struct proc *p));
202 void gsignal __P((int pgid, int sig));
203 int issignal __P((struct proc *p));
204 void killproc __P((struct proc *p, char *why));
205 void pgsigio __P((struct sigio *, int signum, int checkctty));
206 void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
207 void postsig __P((int sig));
208 void psignal __P((struct proc *p, int sig));
209 void sigexit __P((struct thread *td, int signum)) __dead2;
210 void siginit __P((struct proc *p));
211 void trapsignal __P((struct proc *p, int sig, u_long code));
214 * Machine-dependent functions:
216 void sendsig __P((sig_t action, int sig, sigset_t *retmask, u_long code));
220 #endif /* !_SYS_SIGNALVAR_H_ */