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/* $OpenBSD: signalvar.h,v 1.44 2020/09/16 13:50:42 mpi Exp $ */
/* $NetBSD: signalvar.h,v 1.17 1996/04/22 01:23:31 christos Exp $ */
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)signalvar.h 8.3 (Berkeley) 1/4/94
*/
#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
#define _SYS_SIGNALVAR_H_
/*
* Kernel signal definitions and data structures,
* not exported to user programs.
*/
/*
* Process signal actions and state, needed only within the process
* (not necessarily resident).
*/
struct sigacts {
sig_t ps_sigact[NSIG]; /* disposition of signals */
sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
sigset_t ps_sigonstack; /* signals to take on sigstack */
sigset_t ps_sigintr; /* signals that interrupt syscalls */
sigset_t ps_sigreset; /* signals that reset when caught */
sigset_t ps_siginfo; /* signals that provide siginfo */
sigset_t ps_sigignore; /* signals being ignored */
sigset_t ps_sigcatch; /* signals being caught by user */
int ps_sigflags; /* signal flags, below */
};
/* signal flags */
#define SAS_NOCLDSTOP 0x01 /* No SIGCHLD when children stop. */
#define SAS_NOCLDWAIT 0x02 /* No zombies if child dies */
/* additional signal action values, used only temporarily/internally */
#define SIG_CATCH (void (*)(int))2
#define SIG_HOLD (void (*)(int))3
/*
* Check if process p has an unmasked signal pending.
* Return mask of pending signals.
*/
#define SIGPENDING(p) \
(((p)->p_siglist | (p)->p_p->ps_siglist) & ~(p)->p_sigmask)
/*
* Determine signal that should be delivered to process p, the current
* process, 0 if none. If there is a pending stop signal with default
* action, the process stops in issignal().
*/
#define CURSIG(p) \
((((p)->p_siglist | (p)->p_p->ps_siglist) == 0 || \
(((p)->p_p->ps_flags & PS_TRACED) == 0 && \
SIGPENDING(p) == 0)) ? \
0 : issignal(p))
/*
* Clear a pending signal from a process.
*/
#define CLRSIG(p, sig) do { \
int __mask = sigmask(sig); \
atomic_clearbits_int(&(p)->p_siglist, __mask); \
atomic_clearbits_int(&(p)->p_p->ps_siglist, __mask); \
} while (0)
/*
* Signal properties and actions.
* The array below categorizes the signals and their default actions
* according to the following properties:
*/
#define SA_KILL 0x01 /* terminates process by default */
#define SA_CORE 0x02 /* ditto and coredumps */
#define SA_STOP 0x04 /* suspend process */
#define SA_TTYSTOP 0x08 /* ditto, from tty */
#define SA_IGNORE 0x10 /* ignore by default */
#define SA_CONT 0x20 /* continue if suspended */
#define SA_CANTMASK 0x40 /* non-maskable, catchable */
#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
#ifdef _KERNEL
enum signal_type { SPROCESS, STHREAD, SPROPAGATED };
struct sigio_ref;
/*
* Machine-independent functions:
*/
int coredump(struct proc *p);
void execsigs(struct proc *p);
int issignal(struct proc *p);
void pgsigio(struct sigio_ref *sir, int sig, int checkctty);
void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
void psignal(struct proc *p, int sig);
void ptsignal(struct proc *p, int sig, enum signal_type type);
#define prsignal(pr,sig) ptsignal((pr)->ps_mainproc, (sig), SPROCESS)
void siginit(struct sigacts *);
void trapsignal(struct proc *p, int sig, u_long code, int type,
union sigval val);
void sigexit(struct proc *, int);
void sigabort(struct proc *);
int sigismasked(struct proc *, int);
int sigonstack(size_t);
int killpg1(struct proc *, int, int, int);
void signal_init(void);
struct sigacts *sigactsinit(struct process *);
void sigstkinit(struct sigaltstack *);
void sigactsfree(struct process *);
/*
* Machine-dependent functions:
*/
void sendsig(sig_t _catcher, int _sig, sigset_t _mask, const siginfo_t *_si);
#endif /* _KERNEL */
#endif /* !_SYS_SIGNALVAR_H_ */
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