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| Current File : //sys/sys/signal.h |
/*-
* 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: release/9.1.0/sys/sys/signal.h 232290 2012-02-29 06:19:00Z davidxu $
*/
#ifndef _SYS_SIGNAL_H_
#define _SYS_SIGNAL_H_
#include <sys/cdefs.h>
#include <sys/_types.h>
#include <sys/_sigset.h>
#include <machine/_limits.h> /* __MINSIGSTKSZ */
#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 __POSIX_VISIBLE >= 200112 || __XSI_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 /* reserved by thread library. */
#define SIGLWP SIGTHR
#endif
#define SIGRTMIN 65
#define SIGRTMAX 126
#define SIG_DFL ((__sighandler_t *)0)
#define SIG_IGN ((__sighandler_t *)1)
#define SIG_ERR ((__sighandler_t *)-1)
/* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */
#define SIG_HOLD ((__sighandler_t *)3)
/*
* 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 sival_int;
void *sival_ptr;
/* 6.0 compatibility */
int sigval_int;
void *sigval_ptr;
};
#endif
#if __POSIX_VISIBLE >= 199309
struct sigevent {
int sigev_notify; /* Notification type */
int sigev_signo; /* Signal number */
union sigval sigev_value; /* Signal value */
union {
__lwpid_t _threadid;
struct {
void (*_function)(union sigval);
void *_attribute; /* pthread_attr_t * */
} _sigev_thread;
unsigned short _kevent_flags;
long __spare__[8];
} _sigev_un;
};
#if __BSD_VISIBLE
#define sigev_notify_kqueue sigev_signo
#define sigev_notify_kevent_flags _sigev_un._kevent_flags
#define sigev_notify_thread_id _sigev_un._threadid
#endif
#define sigev_notify_function _sigev_un._sigev_thread._function
#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
#define SIGEV_NONE 0 /* No async notification. */
#define SIGEV_SIGNAL 1 /* Generate a queued signal. */
#define SIGEV_THREAD 2 /* Call back from another pthread. */
#if __BSD_VISIBLE
#define SIGEV_KEVENT 3 /* Generate a kevent. */
#define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */
#endif
#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 */
union {
struct {
int _trapno;/* machine specific trap code */
} _fault;
struct {
int _timerid;
int _overrun;
} _timer;
struct {
int _mqd;
} _mesgq;
struct {
long _band; /* band event for SIGPOLL */
} _poll; /* was this ever used ? */
struct {
long __spare1__;
int __spare2__[7];
} __spare__;
} _reason;
} siginfo_t;
#define si_trapno _reason._fault._trapno
#define si_timerid _reason._timer._timerid
#define si_overrun _reason._timer._overrun
#define si_mqd _reason._mesgq._mqd
#define si_band _reason._poll._band
/** si_code **/
/* codes for SIGILL */
#define ILL_ILLOPC 1 /* Illegal opcode. */
#define ILL_ILLOPN 2 /* Illegal operand. */
#define ILL_ILLADR 3 /* Illegal addressing mode. */
#define ILL_ILLTRP 4 /* Illegal trap. */
#define ILL_PRVOPC 5 /* Privileged opcode. */
#define ILL_PRVREG 6 /* Privileged register. */
#define ILL_COPROC 7 /* Coprocessor error. */
#define ILL_BADSTK 8 /* Internal stack error. */
/* codes for SIGBUS */
#define BUS_ADRALN 1 /* Invalid address alignment. */
#define BUS_ADRERR 2 /* Nonexistent physical address. */
#define BUS_OBJERR 3 /* Object-specific hardware error. */
/* codes for SIGSEGV */
#define SEGV_MAPERR 1 /* Address not mapped to object. */
#define SEGV_ACCERR 2 /* Invalid permissions for mapped */
/* object. */
/* codes for SIGFPE */
#define FPE_INTOVF 1 /* Integer overflow. */
#define FPE_INTDIV 2 /* Integer divide by zero. */
#define FPE_FLTDIV 3 /* Floating point divide by zero. */
#define FPE_FLTOVF 4 /* Floating point overflow. */
#define FPE_FLTUND 5 /* Floating point underflow. */
#define FPE_FLTRES 6 /* Floating point inexact result. */
#define FPE_FLTINV 7 /* Invalid floating point operation. */
#define FPE_FLTSUB 8 /* Subscript out of range. */
/* codes for SIGTRAP */
#define TRAP_BRKPT 1 /* Process breakpoint. */
#define TRAP_TRACE 2 /* Process trace trap. */
#define TRAP_DTRACE 3 /* DTrace induced trap. */
/* codes for SIGCHLD */
#define CLD_EXITED 1 /* Child has exited */
#define CLD_KILLED 2 /* Child has terminated abnormally but */
/* did not create a core file */
#define CLD_DUMPED 3 /* Child has terminated abnormally and */
/* created a core file */
#define CLD_TRAPPED 4 /* Traced child has trapped */
#define CLD_STOPPED 5 /* Child has stopped */
#define CLD_CONTINUED 6 /* Stopped child has continued */
/* codes for SIGPOLL */
#define POLL_IN 1 /* Data input available */
#define POLL_OUT 2 /* Output buffers available */
#define POLL_MSG 3 /* Input message available */
#define POLL_ERR 4 /* I/O Error */
#define POLL_PRI 5 /* High priority input available */
#define POLL_HUP 6 /* Device disconnected */
#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_NOINFO 0 /* No signal info besides si_signo. */
#define SI_USER 0x10001 /* Signal sent by kill(). */
#define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */
#define SI_TIMER 0x10003 /* Signal generated by expiration of */
/* a timer set by timer_settime(). */
#define SI_ASYNCIO 0x10004 /* Signal generated by completion of */
/* an asynchronous I/O request.*/
#define SI_MESGQ 0x10005 /* Signal generated by arrival of a */
/* message on an empty message queue. */
#define SI_KERNEL 0x10006
#define SI_LWP 0x10007 /* Signal sent by thr_kill */
#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 MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */
#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__)
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_ */