Annotation of sys/sys/signal.h, Revision 1.1.1.1
1.1 nbrk 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_ */
CVSweb