2 * Copyright (c) 1991, 1993
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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 $
37 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
38 #define _SYS_SIGNALVAR_H_
41 * Don't bring in the entire bleeding include set if we aren't the kernel.
42 * Userland is not allowed to bring in sys/proc.h except under special
43 * circumstances (e.g. sys/user.h)
45 #include <sys/signal.h>
48 #include <machine/lock.h>
52 * Kernel signal definitions and data structures,
53 * not exported to user programs.
57 * Process signal actions and state, needed only within the process
58 * (not necessarily resident).
61 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
62 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
63 sigset_t ps_sigignore; /* Signals being ignored. */
64 sigset_t ps_sigcatch; /* Signals being caught by user. */
65 sigset_t ps_sigonstack; /* signals to take on sigstack */
66 sigset_t ps_sigintr; /* signals that interrupt syscalls */
67 sigset_t ps_sigreset; /* signals that reset when caught */
68 sigset_t ps_signodefer; /* signals not masked while handled */
69 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
70 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
71 unsigned int ps_refcnt;
75 /* additional signal action values, used only temporarily/internally */
76 #define SIG_CATCH ((__sighandler_t *)2)
77 #define SIG_HOLD ((__sighandler_t *)3)
82 * get signal action for process and signal; currently only for current process
84 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
89 * sigset_t manipulation macros
91 #define SIGADDSET(set, signo) \
92 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
94 #define SIGDELSET(set, signo) \
95 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
97 #define SIGEMPTYSET(set) \
100 for (__i = 0; __i < _SIG_WORDS; __i++) \
101 (set).__bits[__i] = 0; \
104 #define SIGFILLSET(set) \
107 for (__i = 0; __i < _SIG_WORDS; __i++) \
108 (set).__bits[__i] = ~(unsigned int)0; \
111 #define SIGISMEMBER(set, signo) \
112 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
114 #define SIGISEMPTY(set) __sigisempty(&(set))
115 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
117 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
118 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
120 #define SIGSETOR(set1, set2) \
123 for (__i = 0; __i < _SIG_WORDS; __i++) \
124 (set1).__bits[__i] |= (set2).__bits[__i]; \
127 #define SIGSETAND(set1, set2) \
130 for (__i = 0; __i < _SIG_WORDS; __i++) \
131 (set1).__bits[__i] &= (set2).__bits[__i]; \
134 #define SIGSETNAND(set1, set2) \
137 for (__i = 0; __i < _SIG_WORDS; __i++) \
138 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
141 #define SIG_CANTMASK(set) \
142 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
144 #define SIG_STOPSIGMASK(set) \
145 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
146 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
148 #define SIG_CONTSIGMASK(set) \
149 SIGDELSET(set, SIGCONT)
151 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
154 __sigisempty(sigset_t *set)
158 for (i = 0; i < _SIG_WORDS; i++) {
166 __sigseteq(sigset_t *set1, sigset_t *set2)
170 for (i = 0; i < _SIG_WORDS; i++) {
171 if (set1->__bits[i] != set2->__bits[i])
179 typedef void (*proc_func_t)(struct proc *);
185 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
188 * Machine-independent functions:
190 void execsigs (struct proc *p);
191 void gsignal (int pgid, int sig);
192 int issignal (struct lwp *lp, int maytrace);
193 int iscaught (struct lwp *p);
194 void killproc (struct proc *p, char *why);
195 void pgsigio (struct sigio *, int signum, int checkctty);
196 void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
197 void postsig (int sig);
198 void ksignal (struct proc *p, int sig);
199 void lwpsignal (struct proc *p, struct lwp *lp, int sig);
200 void siginit (struct proc *p);
201 void trapsignal (struct lwp *p, int sig, u_long code);
204 * Machine-dependent functions:
206 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code);
207 void sigexit (struct lwp *lp, int sig);
208 int checkpoint_signal_handler(struct lwp *p);
212 #endif /* !_SYS_SIGNALVAR_H_ */