2 * Copyright (c) 1991, 1993
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6 * modification, are permitted provided that the following conditions
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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 1.12 2004/11/23 06:32:34 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_sigonstack
; /* signals to take on sigstack */
65 sigset_t ps_sigintr
; /* signals that interrupt syscalls */
66 sigset_t ps_sigreset
; /* signals that reset when caught */
67 sigset_t ps_signodefer
; /* signals not masked while handled */
68 sigset_t ps_siginfo
; /* signals that want SA_SIGINFO args */
69 sigset_t ps_usertramp
; /* SunOS compat; libc sigtramp XXX */
72 /* additional signal action values, used only temporarily/internally */
73 #define SIG_CATCH ((__sighandler_t *)2)
74 #define SIG_HOLD ((__sighandler_t *)3)
79 * get signal action for process and signal; currently only for current process
81 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
86 * sigset_t manipulation macros
88 #define SIGADDSET(set, signo) \
89 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
91 #define SIGDELSET(set, signo) \
92 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
94 #define SIGEMPTYSET(set) \
97 for (__i = 0; __i < _SIG_WORDS; __i++) \
98 (set).__bits[__i] = 0; \
101 #define SIGFILLSET(set) \
104 for (__i = 0; __i < _SIG_WORDS; __i++) \
105 (set).__bits[__i] = ~(unsigned int)0; \
108 #define SIGISMEMBER(set, signo) \
109 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
111 #define SIGISEMPTY(set) __sigisempty(&(set))
112 #define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
114 #define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
115 #define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
117 #define SIGSETOR(set1, set2) \
120 for (__i = 0; __i < _SIG_WORDS; __i++) \
121 (set1).__bits[__i] |= (set2).__bits[__i]; \
124 #define SIGSETAND(set1, set2) \
127 for (__i = 0; __i < _SIG_WORDS; __i++) \
128 (set1).__bits[__i] &= (set2).__bits[__i]; \
131 #define SIGSETNAND(set1, set2) \
134 for (__i = 0; __i < _SIG_WORDS; __i++) \
135 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
138 #define SIG_CANTMASK(set) \
139 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
141 #define SIG_STOPSIGMASK(set) \
142 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
143 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
145 #define SIG_CONTSIGMASK(set) \
146 SIGDELSET(set, SIGCONT)
148 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
151 __sigisempty(sigset_t
*set
)
155 for (i
= 0; i
< _SIG_WORDS
; i
++) {
163 __sigseteq(sigset_t
*set1
, sigset_t
*set2
)
167 for (i
= 0; i
< _SIG_WORDS
; i
++) {
168 if (set1
->__bits
[i
] != set2
->__bits
[i
])
176 typedef void (*proc_func_t
)(struct proc
*);
183 extern int sugid_coredump
; /* Sysctl variable kern.sugid_coredump */
186 * Machine-independent functions:
188 void check_sigacts (void);
189 void execsigs (struct proc
*p
);
190 void gsignal (int pgid
, int sig
);
191 int issignal (struct proc
*p
);
192 int iscaught (struct proc
*p
);
193 void killproc (struct proc
*p
, char *why
);
194 void pgsigio (struct sigio
*, int signum
, int checkctty
);
195 void pgsignal (struct pgrp
*pgrp
, int sig
, int checkctty
);
196 void postsig (int sig
);
197 void psignal (struct proc
*p
, int sig
);
198 void siginit (struct proc
*p
);
199 void trapsignal (struct proc
*p
, int sig
, u_long code
);
200 int __cursig (struct proc
*p
);
203 * Machine-dependent functions:
205 void sendsig (sig_t action
, int sig
, sigset_t
*retmask
, u_long code
);
206 void sendupcall (struct vmupcall
*vu
, int morepending
);
207 int fetchupcall (struct vmupcall
*vu
, int morepending
, void *rsp
);
208 void sigexit (struct proc
*p
, int sig
);
209 int checkpoint_signal_handler(struct proc
*p
);
214 #define CURSIG(p) __cursig(p)
217 * Determine signal that should be delivered to process p, the current
218 * process, 0 if none. If there is a pending stop signal with default
219 * action, the process stops in issignal().
223 extern __inline
int __cursig(struct proc
*p
)
228 tmpset
= p
->p_siglist
;
229 SIGSETNAND(tmpset
, p
->p_sigmask
);
230 if (SIGISEMPTY(p
->p_siglist
) ||
231 (!(p
->p_flag
& P_TRACED
) && SIGISEMPTY(tmpset
))) {
240 #endif /* !_SYS_SIGNALVAR_H_ */