[apple/xnu.git] / bsd / sys / signal.h

/*
 * 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) 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.
 * 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.
 *
 *	@(#)signal.h	8.2 (Berkeley) 1/21/94
 */

#ifndef	_SYS_SIGNAL_H_
#define	_SYS_SIGNAL_H_

#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
#define NSIG	32		/* counting 0; could be 33 (mask is 1-32) */
#endif

#include <machine/signal.h>	/* sigcontext; codes for SIGILL, SIGFPE */

#define	SIGHUP	1	/* hangup */
#define	SIGINT	2	/* interrupt */
#define	SIGQUIT	3	/* quit */
#define	SIGILL	4	/* illegal instruction (not reset when caught) */
#if  !defined(_POSIX_SOURCE)
#define	SIGTRAP	5	/* trace trap (not reset when caught) */
#endif
#define	SIGABRT	6	/* abort() */
#if  !defined(_POSIX_SOURCE)
#define	SIGIOT	SIGABRT	/* compatibility */
#define	SIGEMT	7	/* EMT instruction */
#endif
#define	SIGFPE	8	/* floating point exception */
#define	SIGKILL	9	/* kill (cannot be caught or ignored) */
#if  !defined(_POSIX_SOURCE)
#define	SIGBUS	10	/* bus error */
#endif
#define	SIGSEGV	11	/* segmentation violation */
#if  !defined(_POSIX_SOURCE)
#define	SIGSYS	12	/* bad argument to system call */
#endif
#define	SIGPIPE	13	/* write on a pipe with no one to read it */
#define	SIGALRM	14	/* alarm clock */
#define	SIGTERM	15	/* software termination signal from kill */
#if  !defined(_POSIX_SOURCE)
#define	SIGURG	16	/* urgent condition on IO channel */
#endif
#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 for output if (tp->t_local&LTOSTOP) */
#if  !defined(_POSIX_SOURCE)
#define	SIGIO	23	/* input/output possible signal */
#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 */
#define SIGWINCH 28	/* window size changes */
#define SIGINFO	29	/* information request */
#endif
#define SIGUSR1 30	/* user defined signal 1 */
#define SIGUSR2 31	/* user defined signal 2 */

#if defined(_ANSI_SOURCE) || defined(__cplusplus)
/*
 * Language spec sez we must list exactly one parameter, even though we
 * actually supply three.  Ugh!
 */
#define	SIG_DFL		(void (*)(int))0
#define	SIG_IGN		(void (*)(int))1
#define	SIG_ERR		(void (*)(int))-1
#else
#define	SIG_DFL		(void (*)())0
#define	SIG_IGN		(void (*)())1
#define	SIG_ERR		(void (*)())-1
#endif

#ifndef _ANSI_SOURCE
typedef unsigned int sigset_t;

/*
 * Signal vector "template" used in sigaction call.
 */
struct	sigaction {
#if defined(__cplusplus)
	void	(*sa_handler)(int);	/* signal handler */
#else
	void	(*sa_handler)();	/* signal handler */
#endif /* __cplusplus */
	sigset_t sa_mask;		/* signal mask to apply */
	int	sa_flags;		/* see signal options below */
};
#if  !defined(_POSIX_SOURCE)
#define SA_ONSTACK	0x0001	/* take signal on signal stack */
#define SA_RESTART	0x0002	/* restart system on signal return */
#define	SA_DISABLE	0x0004	/* disable taking signals on alternate stack */
#define	SA_USERTRAMP	0x0100	/* do not bounce off kernel's sigtramp */
#endif
#define SA_NOCLDSTOP	0x0008	/* do not generate SIGCHLD on child stop */

/*
 * 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 */

#if !defined(_POSIX_SOURCE)
#include <sys/cdefs.h>
typedef	void (*sig_t) __P((int));	/* type of signal function */

/*
 * Structure used in sigaltstack call.
 */
struct	sigaltstack {
	char	*ss_sp;		/* signal stack base */
	int	ss_size;		/* signal stack length */
	int	ss_flags;		/* SA_DISABLE and/or SA_ONSTACK */
};
#define	MINSIGSTKSZ	8192			/* minimum allowable stack */
#define	SIGSTKSZ	(MINSIGSTKSZ + 32768)	/* recommended stack size */

/*
 * 4.3 compatibility:
 * Signal vector "template" used in sigvec call.
 */
struct	sigvec {
	void	(*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_onstack sv_flags	/* isn't compatibility wonderful! */

/*
 * Structure used in sigstack call.
 */
struct	sigstack {
	char	*ss_sp;			/* signal stack pointer */
	int	ss_onstack;		/* current status */
};

/*
 * Macro for converting signal number to a mask suitable for
 * sigblock().
 */
#define sigmask(m)	(1 << ((m)-1))

#ifdef	KERNEL
		/*
		 *	signals delivered on a per-thread basis.
		 */
		#define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
				    sigmask(SIGIOT)|sigmask(SIGEMT)|\
				    sigmask(SIGFPE)|sigmask(SIGBUS)|\
				    sigmask(SIGSEGV)|sigmask(SIGSYS)|\
				    sigmask(SIGPIPE))
#endif	/* KERNEL */

#define	BADSIG		SIG_ERR

#endif	/* !_POSIX_SOURCE */
#endif	/* !_ANSI_SOURCE */

/*
 * For historical reasons; programs expect signal's return value to be
 * defined by <sys/signal.h>.
 */
__BEGIN_DECLS
void	(*signal __P((int, void (*) __P((int))))) __P((int));
__END_DECLS
#endif	/* !_SYS_SIGNAL_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* Copyright (c) 1982, 1986, 1989, 1991, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	* (c) UNIX System Laboratories, Inc.
	27	* All or some portions of this file are derived from material licensed
	28	* to the University of California by American Telephone and Telegraph
	29	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	30	* the permission of UNIX System Laboratories, Inc.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)signal.h 8.2 (Berkeley) 1/21/94
	61	*/
	62
	63	#ifndef _SYS_SIGNAL_H_
	64	#define _SYS_SIGNAL_H_
65
66	#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
67	#define NSIG 32 /* counting 0; could be 33 (mask is 1-32) */
68	#endif
69
70	#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
71
72	#define SIGHUP 1 /* hangup */
73	#define SIGINT 2 /* interrupt */
74	#define SIGQUIT 3 /* quit */
75	#define SIGILL 4 /* illegal instruction (not reset when caught) */
76	#if !defined(_POSIX_SOURCE)
77	#define SIGTRAP 5 /* trace trap (not reset when caught) */
78	#endif
79	#define SIGABRT 6 /* abort() */
80	#if !defined(_POSIX_SOURCE)
81	#define SIGIOT SIGABRT /* compatibility */
82	#define SIGEMT 7 /* EMT instruction */
83	#endif
84	#define SIGFPE 8 /* floating point exception */
85	#define SIGKILL 9 /* kill (cannot be caught or ignored) */
86	#if !defined(_POSIX_SOURCE)
87	#define SIGBUS 10 /* bus error */
88	#endif
89	#define SIGSEGV 11 /* segmentation violation */
90	#if !defined(_POSIX_SOURCE)
91	#define SIGSYS 12 /* bad argument to system call */
92	#endif
93	#define SIGPIPE 13 /* write on a pipe with no one to read it */
94	#define SIGALRM 14 /* alarm clock */
95	#define SIGTERM 15 /* software termination signal from kill */
96	#if !defined(_POSIX_SOURCE)
97	#define SIGURG 16 /* urgent condition on IO channel */
98	#endif
99	#define SIGSTOP 17 /* sendable stop signal not from tty */
100	#define SIGTSTP 18 /* stop signal from tty */
101	#define SIGCONT 19 /* continue a stopped process */
102	#define SIGCHLD 20 /* to parent on child stop or exit */
103	#define SIGTTIN 21 /* to readers pgrp upon background tty read */
104	#define SIGTTOU 22 /* like TTIN for output if (tp->t_local&LTOSTOP) */
105	#if !defined(_POSIX_SOURCE)
106	#define SIGIO 23 /* input/output possible signal */
107	#define SIGXCPU 24 /* exceeded CPU time limit */
108	#define SIGXFSZ 25 /* exceeded file size limit */
109	#define SIGVTALRM 26 /* virtual time alarm */
110	#define SIGPROF 27 /* profiling time alarm */
111	#define SIGWINCH 28 /* window size changes */
112	#define SIGINFO 29 /* information request */
113	#endif
114	#define SIGUSR1 30 /* user defined signal 1 */
115	#define SIGUSR2 31 /* user defined signal 2 */
116
117	#if defined(_ANSI_SOURCE) \|\| defined(__cplusplus)
118	/*
119	* Language spec sez we must list exactly one parameter, even though we
120	* actually supply three. Ugh!
121	*/
122	#define SIG_DFL (void (*)(int))0
123	#define SIG_IGN (void (*)(int))1
124	#define SIG_ERR (void (*)(int))-1
125	#else
126	#define SIG_DFL (void (*)())0
127	#define SIG_IGN (void (*)())1
128	#define SIG_ERR (void (*)())-1
129	#endif
130
131	#ifndef _ANSI_SOURCE
132	typedef unsigned int sigset_t;
133
134	/*
135	* Signal vector "template" used in sigaction call.
136	*/
137	struct sigaction {
138	#if defined(__cplusplus)
139	void (sa_handler)(int); / signal handler */
140	#else
141	void (sa_handler)(); / signal handler */
142	#endif /* __cplusplus */
143	sigset_t sa_mask; /* signal mask to apply */
144	int sa_flags; /* see signal options below */
145	};
146	#if !defined(_POSIX_SOURCE)
147	#define SA_ONSTACK 0x0001 /* take signal on signal stack */
148	#define SA_RESTART 0x0002 /* restart system on signal return */
149	#define SA_DISABLE 0x0004 /* disable taking signals on alternate stack */
150	#define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
151	#endif
152	#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
153
154	/*
155	* Flags for sigprocmask:
156	*/
157	#define SIG_BLOCK 1 /* block specified signal set */
158	#define SIG_UNBLOCK 2 /* unblock specified signal set */
159	#define SIG_SETMASK 3 /* set specified signal set */
160
161	#if !defined(_POSIX_SOURCE)
162	#include <sys/cdefs.h>
163	typedef void (sig_t) __P((int)); / type of signal function */
164
165	/*
166	* Structure used in sigaltstack call.
167	*/
168	struct sigaltstack {
169	char ss_sp; / signal stack base */
170	int ss_size; /* signal stack length */
171	int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */
172	};
173	#define MINSIGSTKSZ 8192 /* minimum allowable stack */
174	#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
175
176	/*
177	* 4.3 compatibility:
178	* Signal vector "template" used in sigvec call.
179	*/
180	struct sigvec {
181	void (sv_handler)(); / signal handler */
182	int sv_mask; /* signal mask to apply */
183	int sv_flags; /* see signal options below */
184	};
185
186	#define SV_ONSTACK SA_ONSTACK
187	#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
188	#define sv_onstack sv_flags /* isn't compatibility wonderful! */
189
190	/*
191	* Structure used in sigstack call.
192	*/
193	struct sigstack {
194	char ss_sp; / signal stack pointer */
195	int ss_onstack; /* current status */
196	};
197
198	/*
199	* Macro for converting signal number to a mask suitable for
200	* sigblock().
201	*/
202	#define sigmask(m) (1 << ((m)-1))
203
204	#ifdef KERNEL
205	/*
206	* signals delivered on a per-thread basis.
207	*/
208	#define threadmask (sigmask(SIGILL)\|sigmask(SIGTRAP)\|\
209	sigmask(SIGIOT)\|sigmask(SIGEMT)\|\
210	sigmask(SIGFPE)\|sigmask(SIGBUS)\|\
211	sigmask(SIGSEGV)\|sigmask(SIGSYS)\|\
212	sigmask(SIGPIPE))
213	#endif /* KERNEL */
214
215	#define BADSIG SIG_ERR
216
217	#endif /* !_POSIX_SOURCE */
218	#endif /* !_ANSI_SOURCE */
219
220	/*
221	* For historical reasons; programs expect signal's return value to be
222	* defined by <sys/signal.h>.
223	*/
224	__BEGIN_DECLS
225	void (signal __P((int, void () __P((int))))) __P((int));
226	__END_DECLS
227	#endif /* !_SYS_SIGNAL_H_ */