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