1 /* $OpenBSD: signal.h,v 1.19 2006/01/08 14:20:16 millert Exp $ */
2 /* $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $ */
3
4 /*
5 * Copyright (c) 1982, 1986, 1989, 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)signal.h 8.2 (Berkeley) 1/21/94
38 */
39
40 #ifndef _SYS_SIGNAL_H_
41 #define _SYS_SIGNAL_H_
42
43 #include <sys/cdefs.h>
44 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
45
46 #define _NSIG 32 /* counting 0; could be 33 (mask is 1-32) */
47
48 #if __BSD_VISIBLE
49 #define NSIG _NSIG
50 #endif
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 #if __BSD_VISIBLE
59 #define SIGIOT SIGABRT /* compatibility */
60 #define SIGEMT 7 /* EMT instruction */
61 #endif
62 #define SIGFPE 8 /* floating point exception */
63 #define SIGKILL 9 /* kill (cannot be caught or ignored) */
64 #define SIGBUS 10 /* bus error */
65 #define SIGSEGV 11 /* segmentation violation */
66 #define SIGSYS 12 /* bad argument to system call */
67 #define SIGPIPE 13 /* write on a pipe with no one to read it */
68 #define SIGALRM 14 /* alarm clock */
69 #define SIGTERM 15 /* software termination signal from kill */
70 #define SIGURG 16 /* urgent condition on IO channel */
71 #define SIGSTOP 17 /* sendable stop signal not from tty */
72 #define SIGTSTP 18 /* stop signal from tty */
73 #define SIGCONT 19 /* continue a stopped process */
74 #define SIGCHLD 20 /* to parent on child stop or exit */
75 #define SIGTTIN 21 /* to readers pgrp upon background tty read */
76 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
77 #if __BSD_VISIBLE
78 #define SIGIO 23 /* input/output possible signal */
79 #endif
80 #define SIGXCPU 24 /* exceeded CPU time limit */
81 #define SIGXFSZ 25 /* exceeded file size limit */
82 #define SIGVTALRM 26 /* virtual time alarm */
83 #define SIGPROF 27 /* profiling time alarm */
84 #if __BSD_VISIBLE
85 #define SIGWINCH 28 /* window size changes */
86 #define SIGINFO 29 /* information request */
87 #endif
88 #define SIGUSR1 30 /* user defined signal 1 */
89 #define SIGUSR2 31 /* user defined signal 2 */
90
91 /*
92 * Language spec says we must list exactly one parameter, even though we
93 * actually supply three. Ugh!
94 */
95 #define SIG_DFL (void (*)(int))0
96 #define SIG_IGN (void (*)(int))1
97 #define SIG_ERR (void (*)(int))-1
98
99 #if __POSIX_VISIBLE || __XPG_VISIBLE
100 typedef unsigned int sigset_t;
101
102 #include <sys/siginfo.h>
103
104 /*
105 * Signal vector "template" used in sigaction call.
106 */
107 struct sigaction {
108 union { /* signal handler */
109 void (*__sa_handler)(int);
110 void (*__sa_sigaction)(int, siginfo_t *, void *);
111 } __sigaction_u;
112 sigset_t sa_mask; /* signal mask to apply */
113 int sa_flags; /* see signal options below */
114 };
115
116 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
117 #define sa_handler __sigaction_u.__sa_handler
118 #define sa_sigaction __sigaction_u.__sa_sigaction
119
120 #if __XPG_VISIBLE >= 500
121 #define SA_ONSTACK 0x0001 /* take signal on signal stack */
122 #define SA_RESTART 0x0002 /* restart system on signal return */
123 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
124 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
125 #define SA_NOCLDWAIT 0x0020 /* don't create zombies (assign to pid 1) */
126 #ifdef COMPAT_SUNOS
127 #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
128 #endif
129 #endif /* __XPG_VISIBLE >= 500 */
130 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
131 #if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
132 #define SA_SIGINFO 0x0040 /* generate siginfo_t */
133 #endif
134
135 /*
136 * Flags for sigprocmask:
137 */
138 #define SIG_BLOCK 1 /* block specified signal set */
139 #define SIG_UNBLOCK 2 /* unblock specified signal set */
140 #define SIG_SETMASK 3 /* set specified signal set */
141 #endif /* __POSIX_VISIBLE || __XPG_VISIBLE */
142
143 #if __BSD_VISIBLE
144 typedef void (*sig_t)(int); /* type of signal function */
145
146 /*
147 * 4.3 compatibility:
148 * Signal vector "template" used in sigvec call.
149 */
150 struct sigvec {
151 void (*sv_handler)(int); /* signal handler */
152 int sv_mask; /* signal mask to apply */
153 int sv_flags; /* see signal options below */
154 };
155 #define SV_ONSTACK SA_ONSTACK
156 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
157 #define SV_RESETHAND SA_RESETHAND
158 #define sv_onstack sv_flags /* isn't compatibility wonderful! */
159
160 /*
161 * Macro for converting signal number to a mask suitable for
162 * sigblock().
163 */
164 #define sigmask(m) (1 << ((m)-1))
165
166 #define BADSIG SIG_ERR
167
168 #endif /* __BSD_VISIBLE */
169
170 #if __BSD_VISIBLE || __XPG_VISIBLE >= 420
171 /*
172 * Structure used in sigstack call.
173 */
174 struct sigstack {
175 void *ss_sp; /* signal stack pointer */
176 int ss_onstack; /* current status */
177 };
178
179 /*
180 * Structure used in sigaltstack call.
181 */
182 typedef struct sigaltstack {
183 void *ss_sp; /* signal stack base */
184 size_t ss_size; /* signal stack length */
185 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
186 } stack_t;
187 #define SS_ONSTACK 0x0001 /* take signals on alternate stack */
188 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
189 #define MINSIGSTKSZ 8192 /* minimum allowable stack */
190 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
191
192 #ifdef _KERNEL
193 struct osigaltstack {
194 void *ss_sp; /* signal stack base */
195 int ss_size; /* signal stack length */
196 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
197 };
198 #endif
199
200 typedef struct sigcontext ucontext_t;
201 #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
202
203 /*
204 * For historical reasons; programs expect signal's return value to be
205 * defined by <sys/signal.h>.
206 */
207 __BEGIN_DECLS
208 void (*signal(int, void (*)(int)))(int);
209 __END_DECLS
210 #endif /* !_SYS_SIGNAL_H_ */