1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)signalvar.h 8.6 (Berkeley) 2/19/95
* $FreeBSD$
*/
#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
#define _SYS_SIGNALVAR_H_
#include <sys/signal.h>
/*
* Kernel signal definitions and data structures,
* not exported to user programs.
*/
/*
* Process signal actions and state, needed only within the process
* (not necessarily resident).
*/
struct sigacts {
sig_t ps_sigact[NSIG]; /* disposition of signals */
sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
sigset_t ps_sigonstack; /* signals to take on sigstack */
sigset_t ps_sigintr; /* signals that interrupt syscalls */
sigset_t ps_sigreset; /* signals that reset when caught */
sigset_t ps_signodefer; /* signals not masked while handled */
sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */
int ps_flags; /* signal flags, below */
struct sigaltstack ps_sigstk; /* sp & on stack state variable */
sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
};
/* signal flags */
#define SAS_OLDMASK 0x01 /* need to restore mask before pause */
#define SAS_ALTSTACK 0x02 /* have alternate signal stack */
/* additional signal action values, used only temporarily/internally */
#define SIG_CATCH ((__sighandler_t *)2)
#define SIG_HOLD ((__sighandler_t *)3)
/*
* get signal action for process and signal; currently only for current process
*/
#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
/*
* Determine signal that should be delivered to process p, the current
* process, 0 if none. If there is a pending stop signal with default
* action, the process stops in issignal().
*/
#define CURSIG(p) \
(((p)->p_siglist == 0 || \
(((p)->p_flag & P_TRACED) == 0 && \
((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \
0 : issignal(p))
/*
* Clear a pending signal from a process.
*/
#define CLRSIG(p, sig) { (p)->p_siglist &= ~sigmask(sig); }
/*
* Signal properties and actions.
* The array below categorizes the signals and their default actions
* according to the following properties:
*/
#define SA_KILL 0x01 /* terminates process by default */
#define SA_CORE 0x02 /* ditto and coredumps */
#define SA_STOP 0x04 /* suspend process */
#define SA_TTYSTOP 0x08 /* ditto, from tty */
#define SA_IGNORE 0x10 /* ignore by default */
#define SA_CONT 0x20 /* continue if suspended */
#define SA_CANTMASK 0x40 /* non-maskable, catchable */
#ifdef SIGPROP
static int sigprop[NSIG + 1] = {
0, /* unused */
SA_KILL, /* SIGHUP */
SA_KILL, /* SIGINT */
SA_KILL|SA_CORE, /* SIGQUIT */
SA_KILL|SA_CORE, /* SIGILL */
SA_KILL|SA_CORE, /* SIGTRAP */
SA_KILL|SA_CORE, /* SIGABRT */
SA_KILL|SA_CORE, /* SIGEMT */
SA_KILL|SA_CORE, /* SIGFPE */
SA_KILL, /* SIGKILL */
SA_KILL|SA_CORE, /* SIGBUS */
SA_KILL|SA_CORE, /* SIGSEGV */
SA_KILL|SA_CORE, /* SIGSYS */
SA_KILL, /* SIGPIPE */
SA_KILL, /* SIGALRM */
SA_KILL, /* SIGTERM */
SA_IGNORE, /* SIGURG */
SA_STOP, /* SIGSTOP */
SA_STOP|SA_TTYSTOP, /* SIGTSTP */
SA_IGNORE|SA_CONT, /* SIGCONT */
SA_IGNORE, /* SIGCHLD */
SA_STOP|SA_TTYSTOP, /* SIGTTIN */
SA_STOP|SA_TTYSTOP, /* SIGTTOU */
SA_IGNORE, /* SIGIO */
SA_KILL, /* SIGXCPU */
SA_KILL, /* SIGXFSZ */
SA_KILL, /* SIGVTALRM */
SA_KILL, /* SIGPROF */
SA_IGNORE, /* SIGWINCH */
SA_IGNORE, /* SIGINFO */
SA_KILL, /* SIGUSR1 */
SA_KILL, /* SIGUSR2 */
};
#define contsigmask (sigmask(SIGCONT))
#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
sigmask(SIGTTIN) | sigmask(SIGTTOU))
#endif /* SIGPROP */
#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
#ifdef KERNEL
struct pgrp;
struct proc;
struct sigio;
extern int sugid_coredump; /* Sysctl variable kern.sugid_coredump */
/*
* Machine-independent functions:
*/
void execsigs __P((struct proc *p));
void gsignal __P((int pgid, int sig));
int issignal __P((struct proc *p));
void killproc __P((struct proc *p, char *why));
void pgsigio __P((struct sigio *, int signum, int checkctty));
void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
void postsig __P((int sig));
void psignal __P((struct proc *p, int sig));
void sigexit __P((struct proc *p, int signum));
void siginit __P((struct proc *p));
void trapsignal __P((struct proc *p, int sig, u_long code));
void check_sigacts (void);
/*
* Machine-dependent functions:
*/
void sendsig __P((sig_t action, int sig, int returnmask, u_long code));
#endif /* KERNEL */
#endif /* !_SYS_SIGNALVAR_H_ */
|