1 /* $OpenBSD: signalvar.h,v 1.16 2007/02/06 18:42:37 art Exp $ */
2 /* $NetBSD: signalvar.h,v 1.17 1996/04/22 01:23:31 christos Exp $ */
3
4 /*
5 * Copyright (c) 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)signalvar.h 8.3 (Berkeley) 1/4/94
33 */
34
35 #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
36 #define _SYS_SIGNALVAR_H_
37
38 /*
39 * Kernel signal definitions and data structures,
40 * not exported to user programs.
41 */
42
43 /*
44 * Process signal actions and state, needed only within the process
45 * (not necessarily resident).
46 */
47 struct sigacts {
48 sig_t ps_sigact[NSIG]; /* disposition of signals */
49 sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
50 sigset_t ps_sigonstack; /* signals to take on sigstack */
51 sigset_t ps_sigintr; /* signals that interrupt syscalls */
52 sigset_t ps_sigreset; /* signals that reset when caught */
53 sigset_t ps_siginfo; /* signals that provide siginfo */
54 sigset_t ps_oldmask; /* saved mask from before sigpause */
55 int ps_flags; /* signal flags, below */
56 struct sigaltstack ps_sigstk; /* sp & on stack state variable */
57 int ps_sig; /* for core dump/debugger XXX */
58 long ps_code; /* for core dump/debugger XXX */
59 int ps_type; /* for core dump/debugger XXX */
60 union sigval ps_sigval; /* for core dump/debugger XXX */
61 sigset_t ps_usertramp; /* SunOS compat; libc sigtramp XXX */
62 int ps_refcnt; /* reference count */
63 };
64
65 /* signal flags */
66 #define SAS_OLDMASK 0x01 /* need to restore mask before pause */
67 #define SAS_ALTSTACK 0x02 /* have alternate signal stack */
68
69 /* additional signal action values, used only temporarily/internally */
70 #define SIG_CATCH (void (*)(int))2
71 #define SIG_HOLD (void (*)(int))3
72
73 /*
74 * get signal action for process and signal; currently only for current process
75 */
76 #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
77
78 /*
79 * Determine signal that should be delivered to process p, the current
80 * process, 0 if none. If there is a pending stop signal with default
81 * action, the process stops in issignal().
82 */
83 #define CURSIG(p) \
84 (((p)->p_siglist == 0 || \
85 (((p)->p_flag & P_TRACED) == 0 && \
86 ((p)->p_siglist & ~(p)->p_sigmask) == 0)) ? \
87 0 : issignal(p))
88
89 /*
90 * Clear a pending signal from a process.
91 */
92 #define CLRSIG(p, sig) atomic_clearbits_int(&(p)->p_siglist, sigmask(sig))
93
94 /*
95 * Signal properties and actions.
96 * The array below categorizes the signals and their default actions
97 * according to the following properties:
98 */
99 #define SA_KILL 0x01 /* terminates process by default */
100 #define SA_CORE 0x02 /* ditto and coredumps */
101 #define SA_STOP 0x04 /* suspend process */
102 #define SA_TTYSTOP 0x08 /* ditto, from tty */
103 #define SA_IGNORE 0x10 /* ignore by default */
104 #define SA_CONT 0x20 /* continue if suspended */
105 #define SA_CANTMASK 0x40 /* non-maskable, catchable */
106
107 #ifdef SIGPROP
108 int sigprop[NSIG + 1] = {
109 0, /* unused */
110 SA_KILL, /* SIGHUP */
111 SA_KILL, /* SIGINT */
112 SA_KILL|SA_CORE, /* SIGQUIT */
113 SA_KILL|SA_CORE, /* SIGILL */
114 SA_KILL|SA_CORE, /* SIGTRAP */
115 SA_KILL|SA_CORE, /* SIGABRT */
116 SA_KILL|SA_CORE, /* SIGEMT */
117 SA_KILL|SA_CORE, /* SIGFPE */
118 SA_KILL, /* SIGKILL */
119 SA_KILL|SA_CORE, /* SIGBUS */
120 SA_KILL|SA_CORE, /* SIGSEGV */
121 SA_KILL|SA_CORE, /* SIGSYS */
122 SA_KILL, /* SIGPIPE */
123 SA_KILL, /* SIGALRM */
124 SA_KILL, /* SIGTERM */
125 SA_IGNORE, /* SIGURG */
126 SA_STOP, /* SIGSTOP */
127 SA_STOP|SA_TTYSTOP, /* SIGTSTP */
128 SA_IGNORE|SA_CONT, /* SIGCONT */
129 SA_IGNORE, /* SIGCHLD */
130 SA_STOP|SA_TTYSTOP, /* SIGTTIN */
131 SA_STOP|SA_TTYSTOP, /* SIGTTOU */
132 SA_IGNORE, /* SIGIO */
133 SA_KILL, /* SIGXCPU */
134 SA_KILL, /* SIGXFSZ */
135 SA_KILL, /* SIGVTALRM */
136 SA_KILL, /* SIGPROF */
137 SA_IGNORE, /* SIGWINCH */
138 SA_IGNORE, /* SIGINFO */
139 SA_KILL, /* SIGUSR1 */
140 SA_KILL, /* SIGUSR2 */
141 };
142
143 #define contsigmask (sigmask(SIGCONT))
144 #define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
145 sigmask(SIGTTIN) | sigmask(SIGTTOU))
146
147 #endif /* SIGPROP */
148
149 #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
150
151 #ifdef _KERNEL
152 /*
153 * Machine-independent functions:
154 */
155 int coredump(struct proc *p);
156 void execsigs(struct proc *p);
157 void gsignal(int pgid, int sig);
158 void csignal(pid_t pgid, int signum, uid_t uid, uid_t euid);
159 int issignal(struct proc *p);
160 void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
161 void postsig(int sig);
162 void psignal(struct proc *p, int sig);
163 void siginit(struct proc *p);
164 void trapsignal(struct proc *p, int sig, u_long code, int type,
165 union sigval val);
166 void sigexit(struct proc *, int);
167 void setsigvec(struct proc *, int, struct sigaction *);
168 int killpg1(struct proc *, int, int, int);
169
170 void signal_init(void);
171
172 struct sigacts *sigactsinit(struct proc *);
173 void sigactsshare(struct proc *, struct proc *);
174 void sigactsunshare(struct proc *);
175 void sigactsfree(struct proc *);
176
177 /*
178 * Machine-dependent functions:
179 */
180 void sendsig(sig_t action, int sig, int returnmask, u_long code,
181 int type, union sigval val);
182 struct core;
183 struct vnode;
184 struct ucred;
185 int cpu_coredump(struct proc *, struct vnode *, struct ucred *,
186 struct core *);
187 #endif /* _KERNEL */
188 #endif /* !_SYS_SIGNALVAR_H_ */