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signalvar.h
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signalvar.h
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/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 8.6 (Berkeley) 2/19/95
* $Id: signalvar.h,v 1.22.2.1 1999/01/27 20:51:42 julian Exp $
*/
#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
#define _SYS_SIGNALVAR_H_
#include <sys/signal.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_signodefer; /* signals not masked while handled */
int ps_flags; /* signal flags, below */
struct sigaltstack ps_sigstk; /* sp & on stack state variable */
sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
};
/* 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 ((__sighandler_t *)2)
#define SIG_HOLD ((__sighandler_t *)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) { (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
static 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
struct pgrp;
struct proc;
struct sigio;
extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
/*
* Machine-independent functions:
*/
void execsigs __P((struct proc *p));
char *expand_name __P((const char*, int, int));
void gsignal __P((int pgid, int sig));
int issignal __P((struct proc *p));
void killproc __P((struct proc *p, char *why));
void pgsigio __P((struct sigio *, int signum, int checkctty));
void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
void postsig __P((int sig));
void psignal __P((struct proc *p, int sig));
void sigexit __P((struct proc *p, int signum));
void siginit __P((struct proc *p));
void trapsignal __P((struct proc *p, int sig, u_long code));
void check_sigacts (void);
/*
* Machine-dependent functions:
*/
void sendsig __P((sig_t action, int sig, int returnmask, u_long code));
#endif /* KERNEL */
#endif /* !_SYS_SIGNALVAR_H_ */