664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
301 lines
9.9 KiB
C
301 lines
9.9 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* @(#)signal.h 8.4 (Berkeley) 5/4/95
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* $FreeBSD$
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*/
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#ifndef _SYS_SIGNAL_H_
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#define _SYS_SIGNAL_H_
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#include <sys/cdefs.h>
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#include <sys/_posix.h>
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/*
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* sigset_t macros.
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*/
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#define _SIG_WORDS 4
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#define _SIG_MAXSIG 128
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#define _SIG_IDX(sig) ((sig) - 1)
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#define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5)
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#define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31))
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/*
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* System defined signals.
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*/
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* quit */
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#define SIGILL 4 /* illegal instr. (not reset when caught) */
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#ifndef _POSIX_SOURCE
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#endif
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#define SIGABRT 6 /* abort() */
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#ifndef _POSIX_SOURCE
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#define SIGIOT SIGABRT /* compatibility */
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#define SIGEMT 7 /* EMT instruction */
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#endif
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill (cannot be caught or ignored) */
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#ifndef _POSIX_SOURCE
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#define SIGBUS 10 /* bus error */
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#endif
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#define SIGSEGV 11 /* segmentation violation */
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#ifndef _POSIX_SOURCE
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#define SIGSYS 12 /* non-existent system call invoked */
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#endif
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#define SIGPIPE 13 /* write on a pipe with no one to read it */
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#define SIGALRM 14 /* alarm clock */
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#define SIGTERM 15 /* software termination signal from kill */
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#ifndef _POSIX_SOURCE
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#define SIGURG 16 /* urgent condition on IO channel */
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#endif
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */
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#ifndef _POSIX_SOURCE
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#define SIGIO 23 /* input/output possible signal */
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#define SIGXCPU 24 /* exceeded CPU time limit */
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#define SIGXFSZ 25 /* exceeded file size limit */
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#define SIGVTALRM 26 /* virtual time alarm */
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#define SIGPROF 27 /* profiling time alarm */
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#define SIGWINCH 28 /* window size changes */
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#define SIGINFO 29 /* information request */
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#endif
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#define SIGUSR1 30 /* user defined signal 1 */
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#define SIGUSR2 31 /* user defined signal 2 */
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/*-
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* Type of a signal handling function.
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*
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* Language spec sez signal handlers take exactly one arg, even though we
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* actually supply three. Ugh!
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*
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* We don't try to hide the difference by leaving out the args because
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* that would cause warnings about conformant programs. Nonconformant
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* programs can avoid the warnings by casting to (__sighandler_t *) or
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* sig_t before calling signal() or assigning to sa_handler or sv_handler.
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*
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* The kernel should reverse the cast before calling the function. It
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* has no way to do this, but on most machines 1-arg and 3-arg functions
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* have the same calling protocol so there is no problem in practice.
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* A bit in sa_flags could be used to specify the number of args.
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*/
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typedef void __sighandler_t __P((int));
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#define SIG_DFL ((__sighandler_t *)0)
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#define SIG_IGN ((__sighandler_t *)1)
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#define SIG_ERR ((__sighandler_t *)-1)
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#if defined(_P1003_1B_VISIBLE) || defined(_KERNEL)
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union sigval {
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/* Members as suggested by Annex C of POSIX 1003.1b. */
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int sigval_int;
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void *sigval_ptr;
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};
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struct sigevent {
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int sigev_notify; /* Notification type */
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int sigev_signo; /* Signal number */
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union sigval sigev_value; /* Signal value */
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};
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#define SIGEV_NONE 0 /* No async notification */
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#define SIGEV_SIGNAL 1 /* Generate a queued signal */
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typedef struct __siginfo {
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int si_signo; /* signal number */
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int si_errno; /* errno association */
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/*
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* Cause of signal, one of the SI_ macros or signal-specific
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* values, i.e. one of the FPE_... values for SIGFPE. This
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* value is equivalent to the second argument to an old-style
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* FreeBSD signal handler.
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*/
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int si_code; /* signal code */
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int si_pid; /* sending process */
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unsigned int si_uid; /* sender's ruid */
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int si_status; /* exit value */
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void *si_addr; /* faulting instruction */
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union sigval si_value; /* signal value */
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long si_band; /* band event for SIGPOLL */
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int __spare__[7]; /* gimme some slack */
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} siginfo_t;
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#endif /* _P1003_1B_VISIBLE */
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typedef struct __sigset {
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unsigned int __bits[_SIG_WORDS];
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} sigset_t;
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/*
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* XXX - there are some nasty dependencies on include file order. Now that
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* sigset_t has been defined we can include the MD header.
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*/
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#include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
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#if !defined(_ANSI_SOURCE)
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struct __siginfo;
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/*
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* Signal vector "template" used in sigaction call.
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*/
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struct sigaction {
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union {
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void (*__sa_handler) __P((int));
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void (*__sa_sigaction) __P((int, struct __siginfo *,
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void *));
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} __sigaction_u; /* signal handler */
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int sa_flags; /* see signal options below */
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sigset_t sa_mask; /* signal mask to apply */
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};
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/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
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#define sa_handler __sigaction_u.__sa_handler
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#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
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#if !defined(_POSIX_SOURCE)
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#define sa_sigaction __sigaction_u.__sa_sigaction
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#define SA_ONSTACK 0x0001 /* take signal on signal stack */
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#define SA_RESTART 0x0002 /* restart system call on signal return */
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#define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
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#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
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#define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
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#define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
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#ifdef COMPAT_SUNOS
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#define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
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#endif
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#define NSIG 32 /* number of old signals (counting 0) */
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/* POSIX 1003.1b required values. */
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#define SI_USER 0x10001
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#define SI_QUEUE 0x10002
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#define SI_TIMER 0x10003
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#define SI_ASYNCIO 0x10004
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#define SI_MESGQ 0x10005
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/* Additional FreeBSD values. */
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#define SI_UNDEFINED 0
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typedef void __siginfohandler_t __P((int, struct __siginfo *, void *));
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typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
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#ifdef _BSD_SIZE_T_
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typedef _BSD_SIZE_T_ size_t;
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#undef _BSD_SIZE_T_
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#endif
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/*
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* Structure used in sigaltstack call.
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*/
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typedef struct sigaltstack {
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char *ss_sp; /* signal stack base */
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size_t ss_size; /* signal stack length */
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int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
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} stack_t;
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#define SS_ONSTACK 0x0001 /* take signal on alternate stack */
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#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
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#define MINSIGSTKSZ 8192 /* minimum allowable stack */
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#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
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/* Have enough typedefs for this now. XXX */
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#include <sys/ucontext.h>
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/*
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* 4.3 compatibility:
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* Signal vector "template" used in sigvec call.
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*/
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struct sigvec {
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__sighandler_t *sv_handler; /* signal handler */
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int sv_mask; /* signal mask to apply */
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int sv_flags; /* see signal options below */
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};
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#define SV_ONSTACK SA_ONSTACK
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#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
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#define SV_RESETHAND SA_RESETHAND
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#define SV_NODEFER SA_NODEFER
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#define SV_NOCLDSTOP SA_NOCLDSTOP
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#define SV_SIGINFO SA_SIGINFO
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#define sv_onstack sv_flags /* isn't compatibility wonderful! */
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/*
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* Structure used in sigstack call.
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*/
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struct sigstack {
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char *ss_sp; /* signal stack pointer */
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int ss_onstack; /* current status */
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};
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/*
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* Macro for converting signal number to a mask suitable for
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* sigblock().
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*/
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#define sigmask(m) (1 << ((m)-1))
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#define BADSIG SIG_ERR
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#endif /* !_POSIX_SOURCE */
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/*
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* Flags for sigprocmask:
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*/
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#define SIG_BLOCK 1 /* block specified signal set */
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#define SIG_UNBLOCK 2 /* unblock specified signal set */
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#define SIG_SETMASK 3 /* set specified signal set */
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#endif /* !_ANSI_SOURCE */
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/*
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* For historical reasons; programs expect signal's return value to be
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* defined by <sys/signal.h>.
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*/
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__BEGIN_DECLS
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__sighandler_t *signal __P((int, __sighandler_t *));
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__END_DECLS
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#endif /* !_SYS_SIGNAL_H_ */
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