Change sendfile() to use the new m_ext callback scheme for cleaning up after
[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 $
a94976ad 35 * $DragonFly: src/sys/sys/signalvar.h,v 1.11 2004/01/07 11:04:20 dillon Exp $
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36 */
37
38#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
39#define _SYS_SIGNALVAR_H_
40
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41/*
42 * Don't bring in the entire bleeding include set if we aren't the kernel.
43 * Userland is not allowed to bring in sys/proc.h except under special
44 * circumstances (e.g. sys/user.h)
45 */
984263bc 46#include <sys/signal.h>
05220613 47#ifdef _KERNEL
984263bc 48#include <sys/proc.h>
8a8d5d85 49#include <machine/lock.h>
05220613 50#endif
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51
52/*
53 * Kernel signal definitions and data structures,
54 * not exported to user programs.
55 */
56
57/*
58 * Process signal actions and state, needed only within the process
59 * (not necessarily resident).
60 */
61struct sigacts {
62 sig_t ps_sigact[_SIG_MAXSIG]; /* disposition of signals */
63 sigset_t ps_catchmask[_SIG_MAXSIG]; /* signals to be blocked */
64 sigset_t ps_sigonstack; /* signals to take on sigstack */
65 sigset_t ps_sigintr; /* signals that interrupt syscalls */
66 sigset_t ps_sigreset; /* signals that reset when caught */
67 sigset_t ps_signodefer; /* signals not masked while handled */
68 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
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69 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
70};
71
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72/* additional signal action values, used only temporarily/internally */
73#define SIG_CATCH ((__sighandler_t *)2)
74#define SIG_HOLD ((__sighandler_t *)3)
75
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76#ifdef _KERNEL
77
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78/*
79 * get signal action for process and signal; currently only for current process
80 */
81#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
82
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83#endif
84
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85/*
86 * sigset_t manipulation macros
87 */
88#define SIGADDSET(set, signo) \
89 (set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo)
90
91#define SIGDELSET(set, signo) \
92 (set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo)
93
94#define SIGEMPTYSET(set) \
95 do { \
96 int __i; \
97 for (__i = 0; __i < _SIG_WORDS; __i++) \
98 (set).__bits[__i] = 0; \
99 } while (0)
100
101#define SIGFILLSET(set) \
102 do { \
103 int __i; \
104 for (__i = 0; __i < _SIG_WORDS; __i++) \
105 (set).__bits[__i] = ~(unsigned int)0; \
106 } while (0)
107
108#define SIGISMEMBER(set, signo) \
109 ((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
110
111#define SIGISEMPTY(set) __sigisempty(&(set))
112#define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
113
114#define SIGSETEQ(set1, set2) __sigseteq(&(set1), &(set2))
115#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
116
117#define SIGSETOR(set1, set2) \
118 do { \
119 int __i; \
120 for (__i = 0; __i < _SIG_WORDS; __i++) \
121 (set1).__bits[__i] |= (set2).__bits[__i]; \
122 } while (0)
123
124#define SIGSETAND(set1, set2) \
125 do { \
126 int __i; \
127 for (__i = 0; __i < _SIG_WORDS; __i++) \
128 (set1).__bits[__i] &= (set2).__bits[__i]; \
129 } while (0)
130
131#define SIGSETNAND(set1, set2) \
132 do { \
133 int __i; \
134 for (__i = 0; __i < _SIG_WORDS; __i++) \
135 (set1).__bits[__i] &= ~(set2).__bits[__i]; \
136 } while (0)
137
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138#define SIG_CANTMASK(set) \
139 SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
140
141#define SIG_STOPSIGMASK(set) \
142 SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
143 SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
144
145#define SIG_CONTSIGMASK(set) \
146 SIGDELSET(set, SIGCONT)
147
148#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
149
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150static __inline int
151__sigisempty(sigset_t *set)
152{
153 int i;
154
155 for (i = 0; i < _SIG_WORDS; i++) {
156 if (set->__bits[i])
157 return (0);
158 }
159 return (1);
160}
161
162static __inline int
163__sigseteq(sigset_t *set1, sigset_t *set2)
164{
165 int i;
166
167 for (i = 0; i < _SIG_WORDS; i++) {
168 if (set1->__bits[i] != set2->__bits[i])
169 return (0);
170 }
171 return (1);
172}
173
174#ifdef _KERNEL
175
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176typedef void (*proc_func_t)(struct proc *);
177
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178struct pgrp;
179struct proc;
180struct sigio;
a722be49 181struct vmupcall;
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182
183extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
184
185/*
186 * Machine-independent functions:
187 */
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188void check_sigacts (void);
189void execsigs (struct proc *p);
190void gsignal (int pgid, int sig);
191int issignal (struct proc *p);
a94976ad 192int iscaught (struct proc *p);
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193void killproc (struct proc *p, char *why);
194void pgsigio (struct sigio *, int signum, int checkctty);
195void pgsignal (struct pgrp *pgrp, int sig, int checkctty);
196void postsig (int sig);
197void psignal (struct proc *p, int sig);
198void siginit (struct proc *p);
199void trapsignal (struct proc *p, int sig, u_long code);
200int __cursig (struct proc *p);
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201proc_func_t register_ckpt_func(proc_func_t func);
202
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203
204/*
205 * Machine-dependent functions:
206 */
b153f746 207void sendsig (sig_t action, int sig, sigset_t *retmask, u_long code);
a722be49 208void sendupcall (struct vmupcall *vu, int morepending);
0a455ac5 209int fetchupcall (struct vmupcall *vu, int morepending, void *rsp);
b153f746 210void sigexit (struct proc *p, int sig);
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211
212/*
213 * Inline functions:
214 */
215#define CURSIG(p) __cursig(p)
216
217/*
218 * Determine signal that should be delivered to process p, the current
219 * process, 0 if none. If there is a pending stop signal with default
220 * action, the process stops in issignal().
221 *
222 * MP SAFE
223 */
224extern __inline int __cursig(struct proc *p)
225{
226 sigset_t tmpset;
227 int r;
228
229 tmpset = p->p_siglist;
230 SIGSETNAND(tmpset, p->p_sigmask);
231 if (SIGISEMPTY(p->p_siglist) ||
232 (!(p->p_flag & P_TRACED) && SIGISEMPTY(tmpset))) {
233 return(0);
234 }
984263bc 235 r = issignal(p);
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236 return(r);
237}
238
239#endif /* _KERNEL */
240
241#endif /* !_SYS_SIGNALVAR_H_ */