FreeBSD/Linux Kernel Cross Reference
sys/sys/signal.h
1 /* $NetBSD: signal.h,v 1.63 2006/06/03 18:18:26 christos Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)signal.h 8.4 (Berkeley) 5/4/95
37 */
38
39 #ifndef _SYS_SIGNAL_H_
40 #define _SYS_SIGNAL_H_
41
42 #include <sys/featuretest.h>
43 #include <sys/sigtypes.h>
44
45 #define _NSIG 64
46
47 #if defined(_NETBSD_SOURCE)
48 #define NSIG _NSIG
49
50 #endif /* _NETBSD_SOURCE */
51
52 #define SIGHUP 1 /* hangup */
53 #define SIGINT 2 /* interrupt */
54 #define SIGQUIT 3 /* quit */
55 #define SIGILL 4 /* illegal instruction (not reset when caught) */
56 #define SIGTRAP 5 /* trace trap (not reset when caught) */
57 #define SIGABRT 6 /* abort() */
58 #define SIGIOT SIGABRT /* compatibility */
59 #define SIGEMT 7 /* EMT instruction */
60 #define SIGFPE 8 /* floating point exception */
61 #define SIGKILL 9 /* kill (cannot be caught or ignored) */
62 #define SIGBUS 10 /* bus error */
63 #define SIGSEGV 11 /* segmentation violation */
64 #define SIGSYS 12 /* bad argument to system call */
65 #define SIGPIPE 13 /* write on a pipe with no one to read it */
66 #define SIGALRM 14 /* alarm clock */
67 #define SIGTERM 15 /* software termination signal from kill */
68 #define SIGURG 16 /* urgent condition on IO channel */
69 #define SIGSTOP 17 /* sendable stop signal not from tty */
70 #define SIGTSTP 18 /* stop signal from tty */
71 #define SIGCONT 19 /* continue a stopped process */
72 #define SIGCHLD 20 /* to parent on child stop or exit */
73 #define SIGTTIN 21 /* to readers pgrp upon background tty read */
74 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
75 #define SIGIO 23 /* input/output possible signal */
76 #define SIGXCPU 24 /* exceeded CPU time limit */
77 #define SIGXFSZ 25 /* exceeded file size limit */
78 #define SIGVTALRM 26 /* virtual time alarm */
79 #define SIGPROF 27 /* profiling time alarm */
80 #define SIGWINCH 28 /* window size changes */
81 #define SIGINFO 29 /* information request */
82 #define SIGUSR1 30 /* user defined signal 1 */
83 #define SIGUSR2 31 /* user defined signal 2 */
84 #define SIGPWR 32 /* power fail/restart (not reset when caught) */
85 #ifdef _KERNEL
86 #define SIGRTMIN 33 /* Kernel only; not exposed to userland yet */
87 #define SIGRTMAX 63 /* Kernel only; not exposed to userland yet */
88 #endif
89
90 #ifndef _KERNEL
91 #include <sys/cdefs.h>
92 #endif
93
94 #define SIG_DFL ((void (*)(int)) 0)
95 #define SIG_IGN ((void (*)(int)) 1)
96 #define SIG_ERR ((void (*)(int)) -1)
97 #define SIG_HOLD ((void (*)(int)) 3)
98
99 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
100 defined(_NETBSD_SOURCE)
101
102 #ifdef _KERNEL
103 #define sigaddset(s, n) __sigaddset(s, n)
104 #define sigdelset(s, n) __sigdelset(s, n)
105 #define sigismember(s, n) __sigismember(s, n)
106 #define sigemptyset(s) __sigemptyset(s)
107 #define sigfillset(s) __sigfillset(s)
108 #define sigplusset(s, t) __sigplusset(s, t)
109 #define sigminusset(s, t) __sigminusset(s, t)
110 #endif /* _KERNEL */
111
112 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
113 defined(_NETBSD_SOURCE)
114 #include <sys/siginfo.h>
115 #endif
116
117 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
118 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
119 #include <sys/ucontext.h>
120 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
121
122 /*
123 * Signal vector "template" used in sigaction call.
124 */
125 struct sigaction {
126 union {
127 void (*_sa_handler)(int);
128 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
129 defined(_NETBSD_SOURCE)
130 void (*_sa_sigaction)(int, siginfo_t *, void *);
131 #endif
132 } _sa_u; /* signal handler */
133 sigset_t sa_mask; /* signal mask to apply */
134 int sa_flags; /* see signal options below */
135 };
136
137 #define sa_handler _sa_u._sa_handler
138 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
139 defined(_NETBSD_SOURCE)
140 #define sa_sigaction _sa_u._sa_sigaction
141 #endif
142
143 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
144
145 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
146 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
147 #define SA_ONSTACK 0x0001 /* take signal on signal stack */
148 #define SA_RESTART 0x0002 /* restart system on signal return */
149 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
150 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
151 #endif /* _XOPEN_SOURCE_EXTENDED || XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
152 /* Only valid for SIGCHLD. */
153 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
154 #define SA_NOCLDWAIT 0x0020 /* do not generate zombies on unwaited child */
155 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
156 defined(_NETBSD_SOURCE)
157 #define SA_SIGINFO 0x0040 /* take sa_sigaction handler */
158 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */
159 #if defined(_NETBSD_SOURCE)
160 #define SA_NOKERNINFO 0x0080 /* siginfo does not print kernel info on tty */
161 #endif /*_NETBSD_SOURCE */
162 #ifdef _KERNEL
163 #define SA_ALLBITS 0x00ff
164 #endif
165
166 /*
167 * Flags for sigprocmask():
168 */
169 #define SIG_BLOCK 1 /* block specified signal set */
170 #define SIG_UNBLOCK 2 /* unblock specified signal set */
171 #define SIG_SETMASK 3 /* set specified signal set */
172
173 #if defined(_NETBSD_SOURCE)
174 typedef void (*sig_t)(int); /* type of signal function */
175 #endif
176
177 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
178 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
179 /*
180 * Flags used with stack_t/struct sigaltstack.
181 */
182 #define SS_ONSTACK 0x0001 /* take signals on alternate stack */
183 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
184 #ifdef _KERNEL
185 #define SS_ALLBITS 0x0005
186 #endif
187 #define MINSIGSTKSZ 8192 /* minimum allowable stack */
188 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
189 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
190
191 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
192 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
193 /*
194 * Structure used in sigstack call.
195 */
196 struct sigstack {
197 void *ss_sp; /* signal stack pointer */
198 int ss_onstack; /* current status */
199 };
200 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
201
202 #if defined(_NETBSD_SOURCE) && !defined(_KERNEL)
203 /*
204 * Macro for converting signal number to a mask suitable for
205 * sigblock().
206 */
207 #define sigmask(n) __sigmask(n)
208
209 #define BADSIG SIG_ERR
210 #endif /* _NETBSD_SOURCE */
211
212 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
213 defined(_NETBSD_SOURCE)
214 struct sigevent {
215 int sigev_notify;
216 int sigev_signo;
217 union sigval sigev_value;
218 void (*sigev_notify_function)(union sigval *);
219 void /* pthread_attr_t */ *sigev_notify_attributes;
220 };
221
222 #define SIGEV_NONE 0
223 #define SIGEV_SIGNAL 1
224 #define SIGEV_THREAD 2
225 #define SIGEV_SA 3
226 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */
227
228 #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
229
230 /*
231 * For historical reasons; programs expect signal's return value to be
232 * defined by <sys/signal.h>.
233 */
234 __BEGIN_DECLS
235 void (*signal(int, void (*)(int)))(int);
236 __END_DECLS
237 #endif /* !_SYS_SIGNAL_H_ */
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