176 lines
6.1 KiB
C
176 lines
6.1 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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 8.6 (Berkeley) 2/19/95
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* $Id: signalvar.h,v 1.17 1998/02/24 02:01:11 bde Exp $
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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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#include <sys/signal.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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struct sigacts {
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sig_t ps_sigact[NSIG]; /* disposition of signals */
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sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
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sigset_t ps_sigonstack; /* signals to take on sigstack */
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sigset_t ps_sigintr; /* signals that interrupt syscalls */
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sigset_t ps_sigreset; /* signals that reset when caught */
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sigset_t ps_signodefer; /* signals not masked while handled */
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sigset_t ps_oldmask; /* saved mask from before sigpause */
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int ps_flags; /* signal flags, below */
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struct sigaltstack ps_sigstk; /* sp & on stack state variable */
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int ps_sig; /* for core dump/debugger XXX */
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u_long ps_code; /* for core dump/debugger XXX */
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sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
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};
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/* signal flags */
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#define SAS_OLDMASK 0x01 /* need to restore mask before pause */
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#define SAS_ALTSTACK 0x02 /* have alternate signal stack */
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/* additional signal action values, used only temporarily/internally */
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#define SIG_CATCH ((__sighandler_t *)2)
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#define SIG_HOLD ((__sighandler_t *)3)
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/*
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* get signal action for process and signal; currently only for current process
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*/
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#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
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/*
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* Determine signal that should be delivered to process p, the current
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* process, 0 if none. If there is a pending stop signal with default
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* action, the process stops in issignal().
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*/
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#define CURSIG(p) \
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(((p)->p_siglist == 0 || \
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(((p)->p_flag & P_TRACED) == 0 && \
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((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \
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0 : issignal(p))
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/*
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* Clear a pending signal from a process.
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*/
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#define CLRSIG(p, sig) { (p)->p_siglist &= ~sigmask(sig); }
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/*
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* Signal properties and actions.
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* The array below categorizes the signals and their default actions
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* according to the following properties:
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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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#ifdef SIGPROP
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static int sigprop[NSIG + 1] = {
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0, /* unused */
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SA_KILL, /* SIGHUP */
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SA_KILL, /* SIGINT */
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SA_KILL|SA_CORE, /* SIGQUIT */
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SA_KILL|SA_CORE, /* SIGILL */
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SA_KILL|SA_CORE, /* SIGTRAP */
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SA_KILL|SA_CORE, /* SIGABRT */
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SA_KILL|SA_CORE, /* SIGEMT */
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SA_KILL|SA_CORE, /* SIGFPE */
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SA_KILL, /* SIGKILL */
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SA_KILL|SA_CORE, /* SIGBUS */
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SA_KILL|SA_CORE, /* SIGSEGV */
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SA_KILL|SA_CORE, /* SIGSYS */
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SA_KILL, /* SIGPIPE */
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SA_KILL, /* SIGALRM */
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SA_KILL, /* SIGTERM */
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SA_IGNORE, /* SIGURG */
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SA_STOP, /* SIGSTOP */
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SA_STOP|SA_TTYSTOP, /* SIGTSTP */
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SA_IGNORE|SA_CONT, /* SIGCONT */
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SA_IGNORE, /* SIGCHLD */
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SA_STOP|SA_TTYSTOP, /* SIGTTIN */
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SA_STOP|SA_TTYSTOP, /* SIGTTOU */
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SA_IGNORE, /* SIGIO */
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SA_KILL, /* SIGXCPU */
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SA_KILL, /* SIGXFSZ */
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SA_KILL, /* SIGVTALRM */
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SA_KILL, /* SIGPROF */
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SA_IGNORE, /* SIGWINCH */
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SA_IGNORE, /* SIGINFO */
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SA_KILL, /* SIGUSR1 */
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SA_KILL, /* SIGUSR2 */
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};
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#define contsigmask (sigmask(SIGCONT))
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#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
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sigmask(SIGTTIN) | sigmask(SIGTTOU))
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#endif /* SIGPROP */
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#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
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#ifdef KERNEL
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struct pgrp;
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struct proc;
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/*
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* Machine-independent functions:
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*/
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void execsigs __P((struct proc *p));
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void gsignal __P((int pgid, int sig));
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int issignal __P((struct proc *p));
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void killproc __P((struct proc *p, char *why));
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void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
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void postsig __P((int sig));
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void psignal __P((struct proc *p, int sig));
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void sigexit __P((struct proc *p, int signum));
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void siginit __P((struct proc *p));
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void trapsignal __P((struct proc *p, int sig, u_long code));
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/*
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* Machine-dependent functions:
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*/
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void sendsig __P((sig_t action, int sig, int returnmask, u_long code));
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#endif /* KERNEL */
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#endif /* !_SYS_SIGNALVAR_H_ */
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