Augment falloc() to support thread-only file pointers (with no integer file
[dragonfly.git] / sys / sys / signalvar.h
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1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)signalvar.h 8.6 (Berkeley) 2/19/95
34 * $FreeBSD: src/sys/sys/signalvar.h,v 1.34.2.1 2000/05/16 06:58:05 dillon Exp $
b153f746 35 * $DragonFly: src/sys/sys/signalvar.h,v 1.5 2003/08/20 07:31:21 rob Exp $
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36 */
37
38#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39#define _SYS_SIGNALVAR_H_
40
41#include <sys/signal.h>
42#include <sys/proc.h>
8a8d5d85 43#include <machine/lock.h>
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44
45/*
46 * Kernel signal definitions and data structures,
47 * not exported to user programs.
48 */
49
50/*
51 * Process signal actions and state, needed only within the process
52 * (not necessarily resident).
53 */
54struct sigacts {
55 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
56 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
57 sigset_t ps_sigonstack; /* signals to take on sigstack */
58 sigset_t ps_sigintr; /* signals that interrupt syscalls */
59 sigset_t ps_sigreset; /* signals that reset when caught */
60 sigset_t ps_signodefer; /* signals not masked while handled */
61 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
62 sigset_t ps_osigset; /* signals that use osigset_t */
63 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
64};
65
66/*
67 * Compatibility.
68 */
69typedef struct {
70 struct osigcontext si_sc;
71 int si_signo;
72 int si_code;
73 union sigval si_value;
74} osiginfo_t;
75
76struct osigaction {
77 union {
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78 void (*__sa_handler) (int);
79 void (*__sa_sigaction) (int, osiginfo_t *, void *);
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80 } __sigaction_u; /* signal handler */
81 osigset_t sa_mask; /* signal mask to apply */
82 int sa_flags; /* see signal options below */
83};
84
b153f746 85typedef void __osiginfohandler_t (int, osiginfo_t *, void *);
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86
87/* additional signal action values, used only temporarily/internally */
88#define SIG_CATCH ((__sighandler_t *)2)
89#define SIG_HOLD ((__sighandler_t *)3)
90
91/*
92 * get signal action for process and signal; currently only for current process
93 */
94#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
95
96/*
97 * sigset_t manipulation macros
98 */
99#define SIGADDSET(set, signo) \
100 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
101
102#define SIGDELSET(set, signo) \
103 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
104
105#define SIGEMPTYSET(set) \
106 do { \
107 int __i; \
108 for (__i = 0; __i < _SIG_WORDS; __i++) \
109 (set).__bits[__i] = 0; \
110 } while (0)
111
112#define SIGFILLSET(set) \
113 do { \
114 int __i; \
115 for (__i = 0; __i < _SIG_WORDS; __i++) \
116 (set).__bits[__i] = ~(unsigned int)0; \
117 } while (0)
118
119#define SIGISMEMBER(set, signo) \
120 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
121
122#define SIGISEMPTY(set) __sigisempty(&(set))
123#define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
124
125#define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
126#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
127
128#define SIGSETOR(set1, set2) \
129 do { \
130 int __i; \
131 for (__i = 0; __i < _SIG_WORDS; __i++) \
132 (set1).__bits[__i] |= (set2).__bits[__i]; \
133 } while (0)
134
135#define SIGSETAND(set1, set2) \
136 do { \
137 int __i; \
138 for (__i = 0; __i < _SIG_WORDS; __i++) \
139 (set1).__bits[__i] &= (set2).__bits[__i]; \
140 } while (0)
141
142#define SIGSETNAND(set1, set2) \
143 do { \
144 int __i; \
145 for (__i = 0; __i < _SIG_WORDS; __i++) \
146 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
147 } while (0)
148
149#define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
150#define SIGSETOLD(set, oset) ((set).__bits[0] = (oset))
151
152#define SIG_CANTMASK(set) \
153 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
154
155#define SIG_STOPSIGMASK(set) \
156 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
157 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
158
159#define SIG_CONTSIGMASK(set) \
160 SIGDELSET(set, SIGCONT)
161
162#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
163
164#define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
165#define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
166
167static __inline int
168__sigisempty(sigset_t *set)
169{
170 int i;
171
172 for (i = 0; i < _SIG_WORDS; i++) {
173 if (set->__bits[i])
174 return (0);
175 }
176 return (1);
177}
178
179static __inline int
180__sigseteq(sigset_t *set1, sigset_t *set2)
181{
182 int i;
183
184 for (i = 0; i < _SIG_WORDS; i++) {
185 if (set1->__bits[i] != set2->__bits[i])
186 return (0);
187 }
188 return (1);
189}
190
191#ifdef _KERNEL
192
193struct pgrp;
194struct proc;
195struct sigio;
196
197extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
198
199/*
200 * Machine-independent functions:
201 */
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202void check_sigacts (void);
203void execsigs (struct proc *p);
204void gsignal (int pgid, int sig);
205int issignal (struct proc *p);
206void killproc (struct proc *p, char *why);
207void pgsigio (struct sigio *, int signum, int checkctty);
208void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
209void postsig (int sig);
210void psignal (struct proc *p, int sig);
211void siginit (struct proc *p);
212void trapsignal (struct proc *p, int sig, u_long code);
213int __cursig (struct proc *p);
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214
215/*
216 * Machine-dependent functions:
217 */
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218void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code);
219void sigexit (struct proc *p, int sig);
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220
221/*
222 * Inline functions:
223 */
224#define CURSIG(p) __cursig(p)
225
226/*
227 * Determine signal that should be delivered to process p, the current
228 * process, 0 if none. If there is a pending stop signal with default
229 * action, the process stops in issignal().
230 *
231 * MP SAFE
232 */
233extern __inline int __cursig(struct proc *p)
234{
235 sigset_t tmpset;
236 int r;
237
238 tmpset = p->p_siglist;
239 SIGSETNAND(tmpset, p->p_sigmask);
240 if (SIGISEMPTY(p->p_siglist) ||
241 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) {
242 return(0);
243 }
984263bc 244 r = issignal(p);
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245 return(r);
246}
247
248#endif /* _KERNEL */
249
250#endif /* !_SYS_SIGNALVAR_H_ */