/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ /* * 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 8.3 (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_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 */ int ps_code; /* for core dump/debugger XXX */ int ps_addr; /* for core dump/debugger XXX */ 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 (void (*)())2 #define SIG_HOLD (void (*)())3 #define pgsigio(pgid, sig, notused) \ { \ struct proc *p; \ if (pgid < 0) \ gsignal(-(pgid), sig);\ else if (pgid > 0 && (p = pfind(pgid)) != 0) \ psignal(p, sig); \ } /* * 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 issig(). */ #define HAVE_SIGNALS(p) \ ((p)->p_siglist \ & ~((((p)->p_sigmask) \ | (((p)->p_flag & P_TRACED) ? 0 : (p)->p_sigignore)) \ & ~sigcantmask)) /* * Check for per-process and per thread signals. */ #define SHOULDissignal(p,uthreadp) \ (((p)->p_siglist | (uthreadp)->uu_sig) \ & ~((((p)->p_sigmask) \ | (((p)->p_flag & P_TRACED) ? 0 : (p)->p_sigignore)) \ & ~sigcantmask)) /* * Check for signals and per-thread signals. * Use in trap() and syscall() before * exiting kernel. */ #define CHECK_SIGNALS(p, thread, uthreadp) \ (!thread_should_halt(thread) \ && (SHOULDissignal(p,uthreadp))) /* * 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 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 __P((struct proc *p)); void execsigs __P((struct proc *p)); void gsignal __P((int pgid, int sig)); int issignal __P((struct proc *p)); int CURSIG __P((struct proc *p)); int clear_sigbits __P((struct proc *p, int bit)); void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty)); void postsig __P((int sig)); void psignal __P((struct proc *p, int sig)); void siginit __P((struct proc *p)); void trapsignal __P((struct proc *p, int sig, unsigned code)); void pt_setrunnable __P((struct proc *p)); /* * Machine-dependent functions: */ void sendsig __P((struct proc *, sig_t action, int sig, int returnmask, u_long code)); #endif /* KERNEL */ #endif /* !_SYS_SIGNALVAR_H_ */