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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 $
35 * $DragonFly: src/sys/sys/signalvar.h,v 1.9 2003/11/21 08:32:46 dillon Exp $
38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39 #define _SYS_SIGNALVAR_H_
41 #include <sys/signal.h>
43 #include <machine/lock.h>
46 * Kernel signal definitions and data structures,
47 * not exported to user programs.
51 * Process signal actions and state, needed only within the process
52 * (not necessarily resident).
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_usertramp; /* SunOS compat; libc sigtramp XXX */
65 /* additional signal action values, used only temporarily/internally */
66 #define SIG_CATCH ((__sighandler_t *)2)
67 #define SIG_HOLD ((__sighandler_t *)3)
70 * get signal action for process and signal; currently only for current process
72 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
75 * sigset_t manipulation macros
77 #define SIGADDSET(set, signo) \
78 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
80 #define SIGDELSET(set, signo) \
81 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
83 #define SIGEMPTYSET(set) \
86 for (__i = 0; __i < _SIG_WORDS; __i++) \
87 (set).__bits[__i] = 0; \
90 #define SIGFILLSET(set) \
93 for (__i = 0; __i < _SIG_WORDS; __i++) \
94 (set).__bits[__i] = ~(unsigned int)0; \
97 #define SIGISMEMBER(set, signo) \
98 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
100 #define SIGISEMPTY(set) __sigisempty(&(set))
101 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
103 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
104 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
106 #define SIGSETOR(set1, set2) \
109 for (__i = 0; __i < _SIG_WORDS; __i++) \
110 (set1).__bits[__i] |= (set2).__bits[__i]; \
113 #define SIGSETAND(set1, set2) \
116 for (__i = 0; __i < _SIG_WORDS; __i++) \
117 (set1).__bits[__i] &= (set2).__bits[__i]; \
120 #define SIGSETNAND(set1, set2) \
123 for (__i = 0; __i < _SIG_WORDS; __i++) \
124 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
127 #define SIG_CANTMASK(set) \
128 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
130 #define SIG_STOPSIGMASK(set) \
131 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
132 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
134 #define SIG_CONTSIGMASK(set) \
135 SIGDELSET(set, SIGCONT)
137 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
140 __sigisempty(sigset_t *set)
144 for (i = 0; i < _SIG_WORDS; i++) {
152 __sigseteq(sigset_t *set1, sigset_t *set2)
156 for (i = 0; i < _SIG_WORDS; i++) {
157 if (set1->__bits[i] != set2->__bits[i])
165 typedef void (*proc_func_t)(struct proc *);
172 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
175 * Machine-independent functions:
177 void check_sigacts (void);
178 void execsigs (struct proc *p);
179 void gsignal (int pgid, int sig);
180 int issignal (struct proc *p);
181 void killproc (struct proc *p, char *why);
182 void pgsigio (struct sigio *, int signum, int checkctty);
183 void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
184 void postsig (int sig);
185 void psignal (struct proc *p, int sig);
186 void siginit (struct proc *p);
187 void trapsignal (struct proc *p, int sig, u_long code);
188 int __cursig (struct proc *p);
189 proc_func_t register_ckpt_func(proc_func_t func);
193 * Machine-dependent functions:
195 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code);
196 void sendupcall (struct vmupcall *vu, int morepending);
197 int fetchupcall (struct vmupcall *vu, int morepending, void *rsp);
198 void sigexit (struct proc *p, int sig);
203 #define CURSIG(p) __cursig(p)
206 * Determine signal that should be delivered to process p, the current
207 * process, 0 if none. If there is a pending stop signal with default
208 * action, the process stops in issignal().
212 extern __inline int __cursig(struct proc *p)
217 tmpset = p->p_siglist;
218 SIGSETNAND(tmpset, p->p_sigmask);
219 if (SIGISEMPTY(p->p_siglist) ||
220 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) {
229 #endif /* !_SYS_SIGNALVAR_H_ */