File: [local] / sys / sys / signalvar.h (download)
Revision 1.1, Tue Mar 4 16:16:13 2008 UTC (16 years, 3 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/* $OpenBSD: signalvar.h,v 1.16 2007/02/06 18:42:37 art 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_oldmask; /* saved mask from before sigpause */
int ps_flags; /* signal flags, below */
struct sigaltstack ps_sigstk; /* sp & on stack state variable */
int ps_sig; /* for core dump/debugger XXX */
long ps_code; /* for core dump/debugger XXX */
int ps_type; /* for core dump/debugger XXX */
union sigval ps_sigval; /* for core dump/debugger XXX */
sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
int ps_refcnt; /* reference count */
};
/* signal flags */
#define SAS_OLDMASK 0x01 /* need to restore mask before pause */
#define SAS_ALTSTACK 0x02 /* have alternate signal stack */
/* additional signal action values, used only temporarily/internally */
#define SIG_CATCH (void (*)(int))2
#define SIG_HOLD (void (*)(int))3
/*
* get signal action for process and signal; currently only for current process
*/
#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
/*
* 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 == 0 || \
(((p)->p_flag & P_TRACED) == 0 && \
((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \
0 : issignal(p))
/*
* Clear a pending signal from a process.
*/
#define CLRSIG(p, sig) atomic_clearbits_int(&(p)->p_siglist, sigmask(sig))
/*
* 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 */
#ifdef SIGPROP
int sigprop[NSIG + 1] = {
0, /* unused */
SA_KILL, /* SIGHUP */
SA_KILL, /* SIGINT */
SA_KILL|SA_CORE, /* SIGQUIT */
SA_KILL|SA_CORE, /* SIGILL */
SA_KILL|SA_CORE, /* SIGTRAP */
SA_KILL|SA_CORE, /* SIGABRT */
SA_KILL|SA_CORE, /* SIGEMT */
SA_KILL|SA_CORE, /* SIGFPE */
SA_KILL, /* SIGKILL */
SA_KILL|SA_CORE, /* SIGBUS */
SA_KILL|SA_CORE, /* SIGSEGV */
SA_KILL|SA_CORE, /* SIGSYS */
SA_KILL, /* SIGPIPE */
SA_KILL, /* SIGALRM */
SA_KILL, /* SIGTERM */
SA_IGNORE, /* SIGURG */
SA_STOP, /* SIGSTOP */
SA_STOP|SA_TTYSTOP, /* SIGTSTP */
SA_IGNORE|SA_CONT, /* SIGCONT */
SA_IGNORE, /* SIGCHLD */
SA_STOP|SA_TTYSTOP, /* SIGTTIN */
SA_STOP|SA_TTYSTOP, /* SIGTTOU */
SA_IGNORE, /* SIGIO */
SA_KILL, /* SIGXCPU */
SA_KILL, /* SIGXFSZ */
SA_KILL, /* SIGVTALRM */
SA_KILL, /* SIGPROF */
SA_IGNORE, /* SIGWINCH */
SA_IGNORE, /* SIGINFO */
SA_KILL, /* SIGUSR1 */
SA_KILL, /* SIGUSR2 */
};
#define contsigmask (sigmask(SIGCONT))
#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
sigmask(SIGTTIN) | sigmask(SIGTTOU))
#endif /* SIGPROP */
#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
#ifdef _KERNEL
/*
* Machine-independent functions:
*/
int coredump(struct proc *p);
void execsigs(struct proc *p);
void gsignal(int pgid, int sig);
void csignal(pid_t pgid, int signum, uid_t uid, uid_t euid);
int issignal(struct proc *p);
void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
void postsig(int sig);
void psignal(struct proc *p, int sig);
void siginit(struct proc *p);
void trapsignal(struct proc *p, int sig, u_long code, int type,
union sigval val);
void sigexit(struct proc *, int);
void setsigvec(struct proc *, int, struct sigaction *);
int killpg1(struct proc *, int, int, int);
void signal_init(void);
struct sigacts *sigactsinit(struct proc *);
void sigactsshare(struct proc *, struct proc *);
void sigactsunshare(struct proc *);
void sigactsfree(struct proc *);
/*
* Machine-dependent functions:
*/
void sendsig(sig_t action, int sig, int returnmask, u_long code,
int type, union sigval val);
struct core;
struct vnode;
struct ucred;
int cpu_coredump(struct proc *, struct vnode *, struct ucred *,
struct core *);
#endif /* _KERNEL */
#endif /* !_SYS_SIGNALVAR_H_ */