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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 1.2 2003/06/17 04:28:58 dillon Exp $
38 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39 #define _SYS_SIGNALVAR_H_
41 #include <sys/signal.h>
43 #include <machine/smp.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_osigset; /* signals that use osigset_t */
63 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
70 struct osigcontext si_sc;
73 union sigval si_value;
78 void (*__sa_handler) __P((int));
79 void (*__sa_sigaction) __P((int, osiginfo_t *, void *));
80 } __sigaction_u; /* signal handler */
81 osigset_t sa_mask; /* signal mask to apply */
82 int sa_flags; /* see signal options below */
85 typedef void __osiginfohandler_t __P((int, osiginfo_t *, void *));
87 /* additional signal action values, used only temporarily/internally */
88 #define SIG_CATCH ((__sighandler_t *)2)
89 #define SIG_HOLD ((__sighandler_t *)3)
92 * get signal action for process and signal; currently only for current process
94 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
97 * sigset_t manipulation macros
99 #define SIGADDSET(set, signo) \
100 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
102 #define SIGDELSET(set, signo) \
103 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
105 #define SIGEMPTYSET(set) \
108 for (__i = 0; __i < _SIG_WORDS; __i++) \
109 (set).__bits[__i] = 0; \
112 #define SIGFILLSET(set) \
115 for (__i = 0; __i < _SIG_WORDS; __i++) \
116 (set).__bits[__i] = ~(unsigned int)0; \
119 #define SIGISMEMBER(set, signo) \
120 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
122 #define SIGISEMPTY(set) __sigisempty(&(set))
123 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
125 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
126 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
128 #define SIGSETOR(set1, set2) \
131 for (__i = 0; __i < _SIG_WORDS; __i++) \
132 (set1).__bits[__i] |= (set2).__bits[__i]; \
135 #define SIGSETAND(set1, set2) \
138 for (__i = 0; __i < _SIG_WORDS; __i++) \
139 (set1).__bits[__i] &= (set2).__bits[__i]; \
142 #define SIGSETNAND(set1, set2) \
145 for (__i = 0; __i < _SIG_WORDS; __i++) \
146 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
149 #define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
150 #define SIGSETOLD(set, oset) ((set).__bits[0] = (oset))
152 #define SIG_CANTMASK(set) \
153 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
155 #define SIG_STOPSIGMASK(set) \
156 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
157 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
159 #define SIG_CONTSIGMASK(set) \
160 SIGDELSET(set, SIGCONT)
162 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
164 #define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
165 #define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
168 __sigisempty(sigset_t *set)
172 for (i = 0; i < _SIG_WORDS; i++) {
180 __sigseteq(sigset_t *set1, sigset_t *set2)
184 for (i = 0; i < _SIG_WORDS; i++) {
185 if (set1->__bits[i] != set2->__bits[i])
197 extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
200 * Machine-independent functions:
202 void check_sigacts __P((void));
203 void execsigs __P((struct proc *p));
204 void gsignal __P((int pgid, int sig));
205 int issignal __P((struct proc *p));
206 void killproc __P((struct proc *p, char *why));
207 void pgsigio __P((struct sigio *, int signum, int checkctty));
208 void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
209 void postsig __P((int sig));
210 void psignal __P((struct proc *p, int sig));
211 void sigexit __P((struct proc *p, int signum));
212 void siginit __P((struct proc *p));
213 void trapsignal __P((struct proc *p, int sig, u_long code));
214 int __cursig __P((struct proc *p));
217 * Machine-dependent functions:
219 void sendsig __P((sig_t action, int sig, sigset_t *retmask, u_long code));
224 #define CURSIG(p) __cursig(p)
227 * Determine signal that should be delivered to process p, the current
228 * process, 0 if none. If there is a pending stop signal with default
229 * action, the process stops in issignal().
233 extern __inline int __cursig(struct proc *p)
238 tmpset = p->p_siglist;
239 SIGSETNAND(tmpset, p->p_sigmask);
240 if (SIGISEMPTY(p->p_siglist) ||
241 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) {
252 #endif /* !_SYS_SIGNALVAR_H_ */