140 lines
4.9 KiB
C
140 lines
4.9 KiB
C
/* $OpenBSD: signalvar.h,v 1.54 2022/05/13 15:32:00 claudio Exp $ */
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/* $NetBSD: signalvar.h,v 1.17 1996/04/22 01:23:31 christos Exp $ */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)signalvar.h 8.3 (Berkeley) 1/4/94
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*/
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#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
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#define _SYS_SIGNALVAR_H_
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/*
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* Kernel signal definitions and data structures,
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* not exported to user programs.
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*/
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/*
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* Process signal actions and state, needed only within the process
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* (not necessarily resident).
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*
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* Locks used to protect struct members in struct sigacts:
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* a atomic operations
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* m this process' `ps_mtx'
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*/
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struct sigacts {
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sig_t ps_sigact[NSIG]; /* [m] disposition of signals */
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sigset_t ps_catchmask[NSIG]; /* [m] signals to be blocked */
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sigset_t ps_sigonstack; /* [m] signals to take on sigstack */
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sigset_t ps_sigintr; /* [m] signals interrupt syscalls */
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sigset_t ps_sigreset; /* [m] signals that reset when caught */
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sigset_t ps_siginfo; /* [m] signals that provide siginfo */
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sigset_t ps_sigignore; /* [m] signals being ignored */
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sigset_t ps_sigcatch; /* [m] signals being caught by user */
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int ps_sigflags; /* [a] signal flags, below */
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};
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/* signal flags */
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#define SAS_NOCLDSTOP 0x01 /* No SIGCHLD when children stop. */
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#define SAS_NOCLDWAIT 0x02 /* No zombies if child dies */
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/* additional signal action values, used only temporarily/internally */
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#define SIG_CATCH (void (*)(int))2
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#define SIG_HOLD (void (*)(int))3
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/*
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* Check if process p has an unmasked signal pending.
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* Return mask of pending signals.
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*/
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#define SIGPENDING(p) \
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(((p)->p_siglist | (p)->p_p->ps_siglist) & ~(p)->p_sigmask)
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/*
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* Signal properties and actions.
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*/
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#define SA_KILL 0x01 /* terminates process by default */
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#define SA_CORE 0x02 /* ditto and coredumps */
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#define SA_STOP 0x04 /* suspend process */
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#define SA_TTYSTOP 0x08 /* ditto, from tty */
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#define SA_IGNORE 0x10 /* ignore by default */
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#define SA_CONT 0x20 /* continue if suspended */
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#define SA_CANTMASK 0x40 /* non-maskable, catchable */
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#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
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#ifdef _KERNEL
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enum signal_type { SPROCESS, STHREAD, SPROPAGATED };
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struct sigio_ref;
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struct sigctx {
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sig_t sig_action;
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sigset_t sig_catchmask;
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int sig_onstack;
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int sig_intr;
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int sig_reset;
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int sig_info;
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int sig_ignore;
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int sig_catch;
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};
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/*
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* Machine-independent functions:
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*/
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int coredump(struct proc *p);
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void execsigs(struct proc *p);
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int cursig(struct proc *p, struct sigctx *);
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void pgsigio(struct sigio_ref *sir, int sig, int checkctty);
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void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
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void psignal(struct proc *p, int sig);
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void ptsignal(struct proc *p, int sig, enum signal_type type);
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#define prsignal(pr,sig) ptsignal((pr)->ps_mainproc, (sig), SPROCESS)
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void trapsignal(struct proc *p, int sig, u_long code, int type,
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union sigval val);
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__dead void sigexit(struct proc *, int);
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void sigabort(struct proc *);
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int sigismasked(struct proc *, int);
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int sigonstack(size_t);
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int killpg1(struct proc *, int, int, int);
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void signal_init(void);
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void sigstkinit(struct sigaltstack *);
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struct sigacts *sigactsinit(struct process *);
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void sigactsfree(struct sigacts *);
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void siginit(struct sigacts *);
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/*
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* Machine-dependent functions:
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*/
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int sendsig(sig_t _catcher, int _sig, sigset_t _mask, const siginfo_t *_si,
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int _info, int _onstack);
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#endif /* _KERNEL */
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#endif /* !_SYS_SIGNALVAR_H_ */
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