/*-
* Copyright (c) 1982, 1986, 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
* 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.
*
* @(#)signal.h 8.4 (Berkeley) 5/4/95
* $FreeBSD$
*/
#ifndef _SYS_SIGNAL_H_
#define _SYS_SIGNAL_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#include <sys/_sigset.h>
#include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
/*
* System defined signals.
*/
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGHUP 1 /* hangup */
#endif
#define SIGINT 2 /* interrupt */
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGQUIT 3 /* quit */
#endif
#define SIGILL 4 /* illegal instr. (not reset when caught) */
#if __XSI_VISIBLE
#define SIGTRAP 5 /* trace trap (not reset when caught) */
#endif
#define SIGABRT 6 /* abort() */
#if __BSD_VISIBLE
#define SIGIOT SIGABRT /* compatibility */
#define SIGEMT 7 /* EMT instruction */
#endif
#define SIGFPE 8 /* floating point exception */
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGKILL 9 /* kill (cannot be caught or ignored) */
#endif
#if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
#define SIGBUS 10 /* bus error */
#endif
#define SIGSEGV 11 /* segmentation violation */
#if __BSD_VISIBLE
#define SIGSYS 12 /* non-existent system call invoked */
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGPIPE 13 /* write on a pipe with no one to read it */
#define SIGALRM 14 /* alarm clock */
#endif
#define SIGTERM 15 /* software termination signal from kill */
#if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
#define SIGURG 16 /* urgent condition on IO channel */
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGSTOP 17 /* sendable stop signal not from tty */
#define SIGTSTP 18 /* stop signal from tty */
#define SIGCONT 19 /* continue a stopped process */
#define SIGCHLD 20 /* to parent on child stop or exit */
#define SIGTTIN 21 /* to readers pgrp upon background tty read */
#define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */
#endif
#if __BSD_VISIBLE
#define SIGIO 23 /* input/output possible signal */
#endif
#if __XSI_VISIBLE
#define SIGXCPU 24 /* exceeded CPU time limit */
#define SIGXFSZ 25 /* exceeded file size limit */
#define SIGVTALRM 26 /* virtual time alarm */
#define SIGPROF 27 /* profiling time alarm */
#endif
#if __BSD_VISIBLE
#define SIGWINCH 28 /* window size changes */
#define SIGINFO 29 /* information request */
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SIGUSR1 30 /* user defined signal 1 */
#define SIGUSR2 31 /* user defined signal 2 */
#endif
#if __BSD_VISIBLE
#define SIGTHR 32 /* Thread interrupt. */
#endif
/*
* XXX missing SIGRTMIN, SIGRTMAX.
*/
#define SIG_DFL ((__sighandler_t *)0)
#define SIG_IGN ((__sighandler_t *)1)
#define SIG_ERR ((__sighandler_t *)-1)
/*
* XXX missing SIG_HOLD.
*/
/*-
* Type of a signal handling function.
*
* Language spec sez signal handlers take exactly one arg, even though we
* actually supply three. Ugh!
*
* We don't try to hide the difference by leaving out the args because
* that would cause warnings about conformant programs. Nonconformant
* programs can avoid the warnings by casting to (__sighandler_t *) or
* sig_t before calling signal() or assigning to sa_handler or sv_handler.
*
* The kernel should reverse the cast before calling the function. It
* has no way to do this, but on most machines 1-arg and 3-arg functions
* have the same calling protocol so there is no problem in practice.
* A bit in sa_flags could be used to specify the number of args.
*/
typedef void __sighandler_t(int);
#if __POSIX_VISIBLE || __XSI_VISIBLE
#ifndef _SIGSET_T_DECLARED
#define _SIGSET_T_DECLARED
typedef __sigset_t sigset_t;
#endif
#endif
#if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500
union sigval {
/* Members as suggested by Annex C of POSIX 1003.1b. */
int sigval_int;
void *sigval_ptr;
};
#endif
#if __POSIX_VISIBLE >= 199309
struct sigevent {
int sigev_notify; /* Notification type */
union {
int __sigev_signo; /* Signal number */
int __sigev_notify_kqueue;
} __sigev_u;
union sigval sigev_value; /* Signal value */
/*
* XXX missing sigev_notify_function, sigev_notify_attributes.
*/
};
#define sigev_signo __sigev_u.__sigev_signo
#if __BSD_VISIBLE
#define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue
#endif
#define SIGEV_NONE 0 /* No async notification */
#define SIGEV_SIGNAL 1 /* Generate a queued signal */
#if __BSD_VISIBLE
#define SIGEV_KEVENT 3 /* Generate a kevent */
#endif
/*
* XXX missing SIGEV_THREAD.
*/
#endif /* __POSIX_VISIBLE >= 199309 */
#if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE
typedef struct __siginfo {
int si_signo; /* signal number */
int si_errno; /* errno association */
/*
* Cause of signal, one of the SI_ macros or signal-specific
* values, i.e. one of the FPE_... values for SIGFPE. This
* value is equivalent to the second argument to an old-style
* FreeBSD signal handler.
*/
int si_code; /* signal code */
__pid_t si_pid; /* sending process */
__uid_t si_uid; /* sender's ruid */
int si_status; /* exit value */
void *si_addr; /* faulting instruction */
union sigval si_value; /* signal value */
long si_band; /* band event for SIGPOLL */
int __spare__[7]; /* gimme some slack */
} siginfo_t;
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
struct __siginfo;
/*
* Signal vector "template" used in sigaction call.
*/
struct sigaction {
union {
void (*__sa_handler)(int);
void (*__sa_sigaction)(int, struct __siginfo *, void *);
} __sigaction_u; /* signal handler */
int sa_flags; /* see signal options below */
sigset_t sa_mask; /* signal mask to apply */
};
#define sa_handler __sigaction_u.__sa_handler
#endif
#if __XSI_VISIBLE
/* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */
#define sa_sigaction __sigaction_u.__sa_sigaction
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
#endif /* __POSIX_VISIBLE || __XSI_VISIBLE */
#if __XSI_VISIBLE
#define SA_ONSTACK 0x0001 /* take signal on signal stack */
#define SA_RESTART 0x0002 /* restart system call on signal return */
#define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
#define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
#define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
#endif
#if __BSD_VISIBLE
#define NSIG 32 /* number of old signals (counting 0) */
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
#define SI_USER 0x10001
#define SI_QUEUE 0x10002
#define SI_TIMER 0x10003
#define SI_ASYNCIO 0x10004
#define SI_MESGQ 0x10005
#endif
#if __BSD_VISIBLE
#define SI_UNDEFINED 0
#endif
#if __BSD_VISIBLE
typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
typedef void __siginfohandler_t(int, struct __siginfo *, void *);
#endif
#if __XSI_VISIBLE
/*
* Structure used in sigaltstack call.
*/
#if __BSD_VISIBLE
typedef struct sigaltstack {
#else
typedef struct {
#endif
char *ss_sp; /* signal stack base */
__size_t ss_size; /* signal stack length */
int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
} stack_t;
#define SS_ONSTACK 0x0001 /* take signal on alternate stack */
#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
#endif
#if __BSD_VISIBLE
/*
* 4.3 compatibility:
* Signal vector "template" used in sigvec call.
*/
struct sigvec {
__sighandler_t *sv_handler; /* signal handler */
int sv_mask; /* signal mask to apply */
int sv_flags; /* see signal options below */
};
#define SV_ONSTACK SA_ONSTACK
#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
#define SV_RESETHAND SA_RESETHAND
#define SV_NODEFER SA_NODEFER
#define SV_NOCLDSTOP SA_NOCLDSTOP
#define SV_SIGINFO SA_SIGINFO
#define sv_onstack sv_flags /* isn't compatibility wonderful! */
#endif
/* Keep this in one place only */
#if defined(_KERNEL) && defined(COMPAT_43) && \
!defined(__i386__) && !defined(__alpha__)
struct osigcontext {
int _not_used;
};
#endif
#if __XSI_VISIBLE
/*
* Structure used in sigstack call.
*/
struct sigstack {
/* XXX ss_sp's type should be `void *'. */
char *ss_sp; /* signal stack pointer */
int ss_onstack; /* current status */
};
#endif
#if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112
/*
* Macro for converting signal number to a mask suitable for
* sigblock().
*/
#define sigmask(m) (1 << ((m)-1))
#endif
#if __BSD_VISIBLE
#define BADSIG SIG_ERR
#endif
#if __POSIX_VISIBLE || __XSI_VISIBLE
/*
* Flags for sigprocmask:
*/
#define SIG_BLOCK 1 /* block specified signal set */
#define SIG_UNBLOCK 2 /* unblock specified signal set */
#define SIG_SETMASK 3 /* set specified signal set */
#endif
/*
* For historical reasons; programs expect signal's return value to be
* defined by <sys/signal.h>.
*/
__BEGIN_DECLS
__sighandler_t *signal(int, __sighandler_t *);
__END_DECLS
#endif /* !_SYS_SIGNAL_H_ */
