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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 1.23 2008/04/21 15:47:58 dillon Exp $
38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39 #define _SYS_SIGNALVAR_H_
42 * Don't bring in the entire bleeding include set if we aren't the kernel.
43 * Userland is not allowed to bring in sys/proc.h except under special
44 * circumstances (e.g. sys/user.h)
46 #include <sys/signal.h>
49 #include <machine/lock.h>
53 * Kernel signal definitions and data structures,
54 * not exported to user programs.
58 * Process signal actions and state, needed only within the process
59 * (not necessarily resident).
62 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
63 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
64 sigset_t ps_sigignore; /* Signals being ignored. */
65 sigset_t ps_sigcatch; /* Signals being caught by user. */
66 sigset_t ps_sigonstack; /* signals to take on sigstack */
67 sigset_t ps_sigintr; /* signals that interrupt syscalls */
68 sigset_t ps_sigreset; /* signals that reset when caught */
69 sigset_t ps_signodefer; /* signals not masked while handled */
70 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
71 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
72 unsigned int ps_refcnt;
76 /* additional signal action values, used only temporarily/internally */
77 #define SIG_CATCH ((__sighandler_t *)2)
78 #define SIG_HOLD ((__sighandler_t *)3)
83 * get signal action for process and signal; currently only for current process
85 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
90 * sigset_t manipulation macros
92 #define SIGADDSET(set, signo) \
93 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
95 #define SIGDELSET(set, signo) \
96 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
98 #define SIGEMPTYSET(set) \
101 for (__i = 0; __i < _SIG_WORDS; __i++) \
102 (set).__bits[__i] = 0; \
105 #define SIGFILLSET(set) \
108 for (__i = 0; __i < _SIG_WORDS; __i++) \
109 (set).__bits[__i] = ~(unsigned int)0; \
112 #define SIGISMEMBER(set, signo) \
113 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
115 #define SIGISEMPTY(set) __sigisempty(&(set))
116 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
118 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
119 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
121 #define SIGSETOR(set1, set2) \
124 for (__i = 0; __i < _SIG_WORDS; __i++) \
125 (set1).__bits[__i] |= (set2).__bits[__i]; \
128 #define SIGSETAND(set1, set2) \
131 for (__i = 0; __i < _SIG_WORDS; __i++) \
132 (set1).__bits[__i] &= (set2).__bits[__i]; \
135 #define SIGSETNAND(set1, set2) \
138 for (__i = 0; __i < _SIG_WORDS; __i++) \
139 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
142 #define SIG_CANTMASK(set) \
143 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
145 #define SIG_STOPSIGMASK(set) \
146 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
147 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
149 #define SIG_CONTSIGMASK(set) \
150 SIGDELSET(set, SIGCONT)
152 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
155 __sigisempty(sigset_t *set)
159 for (i = 0; i < _SIG_WORDS; i++) {
167 __sigseteq(sigset_t *set1, sigset_t *set2)
171 for (i = 0; i < _SIG_WORDS; i++) {
172 if (set1->__bits[i] != set2->__bits[i])
180 typedef void (*proc_func_t)(struct proc *);
187 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
190 * Machine-independent functions:
192 void execsigs (struct proc *p);
193 void gsignal (int pgid, int sig);
194 int issignal (struct lwp *lp, int maytrace);
195 int iscaught (struct lwp *p);
196 void killproc (struct proc *p, char *why);
197 void pgsigio (struct sigio *, int signum, int checkctty);
198 void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
199 void postsig (int sig);
200 void ksignal (struct proc *p, int sig);
201 void lwpsignal (struct proc *p, struct lwp *lp, int sig);
202 void siginit (struct proc *p);
203 void trapsignal (struct lwp *p, int sig, u_long code);
206 * Machine-dependent functions:
208 void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code);
209 void sendupcall (struct vmupcall *vu, int morepending);
210 int fetchupcall (struct vmupcall *vu, int morepending, void *rsp);
211 void sigexit (struct lwp *lp, int sig);
212 int checkpoint_signal_handler(struct lwp *p);
216 #endif /* !_SYS_SIGNALVAR_H_ */