Annotation of sys/sys/signalvar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: signalvar.h,v 1.16 2007/02/06 18:42:37 art Exp $ */
! 2: /* $NetBSD: signalvar.h,v 1.17 1996/04/22 01:23:31 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1991, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)signalvar.h 8.3 (Berkeley) 1/4/94
! 33: */
! 34:
! 35: #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
! 36: #define _SYS_SIGNALVAR_H_
! 37:
! 38: /*
! 39: * Kernel signal definitions and data structures,
! 40: * not exported to user programs.
! 41: */
! 42:
! 43: /*
! 44: * Process signal actions and state, needed only within the process
! 45: * (not necessarily resident).
! 46: */
! 47: struct sigacts {
! 48: sig_t ps_sigact[NSIG]; /* disposition of signals */
! 49: sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
! 50: sigset_t ps_sigonstack; /* signals to take on sigstack */
! 51: sigset_t ps_sigintr; /* signals that interrupt syscalls */
! 52: sigset_t ps_sigreset; /* signals that reset when caught */
! 53: sigset_t ps_siginfo; /* signals that provide siginfo */
! 54: sigset_t ps_oldmask; /* saved mask from before sigpause */
! 55: int ps_flags; /* signal flags, below */
! 56: struct sigaltstack ps_sigstk; /* sp & on stack state variable */
! 57: int ps_sig; /* for core dump/debugger XXX */
! 58: long ps_code; /* for core dump/debugger XXX */
! 59: int ps_type; /* for core dump/debugger XXX */
! 60: union sigval ps_sigval; /* for core dump/debugger XXX */
! 61: sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
! 62: int ps_refcnt; /* reference count */
! 63: };
! 64:
! 65: /* signal flags */
! 66: #define SAS_OLDMASK 0x01 /* need to restore mask before pause */
! 67: #define SAS_ALTSTACK 0x02 /* have alternate signal stack */
! 68:
! 69: /* additional signal action values, used only temporarily/internally */
! 70: #define SIG_CATCH (void (*)(int))2
! 71: #define SIG_HOLD (void (*)(int))3
! 72:
! 73: /*
! 74: * get signal action for process and signal; currently only for current process
! 75: */
! 76: #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
! 77:
! 78: /*
! 79: * Determine signal that should be delivered to process p, the current
! 80: * process, 0 if none. If there is a pending stop signal with default
! 81: * action, the process stops in issignal().
! 82: */
! 83: #define CURSIG(p) \
! 84: (((p)->p_siglist == 0 || \
! 85: (((p)->p_flag & P_TRACED) == 0 && \
! 86: ((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \
! 87: 0 : issignal(p))
! 88:
! 89: /*
! 90: * Clear a pending signal from a process.
! 91: */
! 92: #define CLRSIG(p, sig) atomic_clearbits_int(&(p)->p_siglist, sigmask(sig))
! 93:
! 94: /*
! 95: * Signal properties and actions.
! 96: * The array below categorizes the signals and their default actions
! 97: * according to the following properties:
! 98: */
! 99: #define SA_KILL 0x01 /* terminates process by default */
! 100: #define SA_CORE 0x02 /* ditto and coredumps */
! 101: #define SA_STOP 0x04 /* suspend process */
! 102: #define SA_TTYSTOP 0x08 /* ditto, from tty */
! 103: #define SA_IGNORE 0x10 /* ignore by default */
! 104: #define SA_CONT 0x20 /* continue if suspended */
! 105: #define SA_CANTMASK 0x40 /* non-maskable, catchable */
! 106:
! 107: #ifdef SIGPROP
! 108: int sigprop[NSIG + 1] = {
! 109: 0, /* unused */
! 110: SA_KILL, /* SIGHUP */
! 111: SA_KILL, /* SIGINT */
! 112: SA_KILL|SA_CORE, /* SIGQUIT */
! 113: SA_KILL|SA_CORE, /* SIGILL */
! 114: SA_KILL|SA_CORE, /* SIGTRAP */
! 115: SA_KILL|SA_CORE, /* SIGABRT */
! 116: SA_KILL|SA_CORE, /* SIGEMT */
! 117: SA_KILL|SA_CORE, /* SIGFPE */
! 118: SA_KILL, /* SIGKILL */
! 119: SA_KILL|SA_CORE, /* SIGBUS */
! 120: SA_KILL|SA_CORE, /* SIGSEGV */
! 121: SA_KILL|SA_CORE, /* SIGSYS */
! 122: SA_KILL, /* SIGPIPE */
! 123: SA_KILL, /* SIGALRM */
! 124: SA_KILL, /* SIGTERM */
! 125: SA_IGNORE, /* SIGURG */
! 126: SA_STOP, /* SIGSTOP */
! 127: SA_STOP|SA_TTYSTOP, /* SIGTSTP */
! 128: SA_IGNORE|SA_CONT, /* SIGCONT */
! 129: SA_IGNORE, /* SIGCHLD */
! 130: SA_STOP|SA_TTYSTOP, /* SIGTTIN */
! 131: SA_STOP|SA_TTYSTOP, /* SIGTTOU */
! 132: SA_IGNORE, /* SIGIO */
! 133: SA_KILL, /* SIGXCPU */
! 134: SA_KILL, /* SIGXFSZ */
! 135: SA_KILL, /* SIGVTALRM */
! 136: SA_KILL, /* SIGPROF */
! 137: SA_IGNORE, /* SIGWINCH */
! 138: SA_IGNORE, /* SIGINFO */
! 139: SA_KILL, /* SIGUSR1 */
! 140: SA_KILL, /* SIGUSR2 */
! 141: };
! 142:
! 143: #define contsigmask (sigmask(SIGCONT))
! 144: #define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
! 145: sigmask(SIGTTIN) | sigmask(SIGTTOU))
! 146:
! 147: #endif /* SIGPROP */
! 148:
! 149: #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
! 150:
! 151: #ifdef _KERNEL
! 152: /*
! 153: * Machine-independent functions:
! 154: */
! 155: int coredump(struct proc *p);
! 156: void execsigs(struct proc *p);
! 157: void gsignal(int pgid, int sig);
! 158: void csignal(pid_t pgid, int signum, uid_t uid, uid_t euid);
! 159: int issignal(struct proc *p);
! 160: void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
! 161: void postsig(int sig);
! 162: void psignal(struct proc *p, int sig);
! 163: void siginit(struct proc *p);
! 164: void trapsignal(struct proc *p, int sig, u_long code, int type,
! 165: union sigval val);
! 166: void sigexit(struct proc *, int);
! 167: void setsigvec(struct proc *, int, struct sigaction *);
! 168: int killpg1(struct proc *, int, int, int);
! 169:
! 170: void signal_init(void);
! 171:
! 172: struct sigacts *sigactsinit(struct proc *);
! 173: void sigactsshare(struct proc *, struct proc *);
! 174: void sigactsunshare(struct proc *);
! 175: void sigactsfree(struct proc *);
! 176:
! 177: /*
! 178: * Machine-dependent functions:
! 179: */
! 180: void sendsig(sig_t action, int sig, int returnmask, u_long code,
! 181: int type, union sigval val);
! 182: struct core;
! 183: struct vnode;
! 184: struct ucred;
! 185: int cpu_coredump(struct proc *, struct vnode *, struct ucred *,
! 186: struct core *);
! 187: #endif /* _KERNEL */
! 188: #endif /* !_SYS_SIGNALVAR_H_ */
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