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1.1 root 1: /*
2: * Copyright (c) 1991 Regents of the University of California.
3: * 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 7.1 (Berkeley) 5/9/91
34: */
35:
36: #ifndef _SIGNALVAR_H_ /* tmp for user.h */
37: #define _SIGNALVAR_H_
38:
39: /*
40: * Kernel signal definitions and data structures,
41: * not exported to user programs.
42: */
43:
44: /*
45: * Process signal actions and state, needed only within the process
46: * (not necessarily resident).
47: */
48: struct sigacts {
49: sig_t ps_sigact[NSIG]; /* disposition of signals */
50: sigset_t ps_catchmask[NSIG]; /* signals to be blocked */
51: sigset_t ps_sigonstack; /* signals to take on sigstack */
52: sigset_t ps_sigintr; /* signals that interrupt syscalls */
53: sigset_t ps_oldmask; /* saved mask from before sigpause */
54: int ps_flags; /* signal flags, below */
55: struct sigstack ps_sigstack; /* sp & on stack state variable */
56: int ps_sig; /* for core dump/debugger XXX */
57: int ps_code; /* for core dump/debugger XXX */
58: };
59:
60: #define ps_onstack ps_sigstack.ss_onstack
61: #define ps_sigsp ps_sigstack.ss_sp
62:
63: /* signal flags */
64: #define SA_OLDMASK 0x01 /* need to restore mask before pause */
65:
66: /* additional signal action values, used only temporarily/internally */
67: #define SIG_CATCH (void (*)())2
68: #define SIG_HOLD (void (*)())3
69:
70: /*
71: * get signal action for process and signal; currently only for current process
72: */
73: #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)])
74:
75: /*
76: * Determine signal that should be delivered to process p, the current process,
77: * 0 if none. If there is a pending stop signal with default action,
78: * the process stops in issig().
79: */
80: #define CURSIG(p) \
81: (((p)->p_sig == 0 || \
82: ((p)->p_flag&STRC) == 0 && ((p)->p_sig &~ (p)->p_sigmask) == 0) ? \
83: 0 : issig(p))
84:
85: /*
86: * Clear a pending signal from a process.
87: */
88: #define CLRSIG(p, sig) { (p)->p_sig &= ~sigmask(sig); }
89:
90: /*
91: * Signal properties and actions.
92: * The array below categorizes the signals and their default actions
93: * according to the following properties:
94: */
95: #define SA_KILL 0x01 /* terminates process by default */
96: #define SA_CORE 0x02 /* ditto and coredumps */
97: #define SA_STOP 0x04 /* suspend process */
98: #define SA_TTYSTOP (0x08|SA_STOP) /* ditto, from tty */
99: #define SA_IGNORE 0x10 /* ignore by default */
100: #define SA_CONT 0x20 /* continue if suspended */
101: #define SA_CANTMASK 0x40 /* non-maskable, catchable */
102:
103: #ifdef SIGPROP
104: int sigprop[NSIG + 1] = {
105: 0, /* unused */
106: SA_KILL, /* SIGHUP */
107: SA_KILL, /* SIGINT */
108: SA_KILL|SA_CORE, /* SIGQUIT */
109: SA_KILL|SA_CORE, /* SIGILL */
110: SA_KILL|SA_CORE, /* SIGTRAP */
111: SA_KILL|SA_CORE, /* SIGABRT */
112: SA_KILL|SA_CORE, /* SIGEMT */
113: SA_KILL|SA_CORE, /* SIGFPE */
114: SA_KILL, /* SIGKILL */
115: SA_KILL|SA_CORE, /* SIGBUS */
116: SA_KILL|SA_CORE, /* SIGSEGV */
117: SA_KILL|SA_CORE, /* SIGSYS */
118: SA_KILL, /* SIGPIPE */
119: SA_KILL, /* SIGALRM */
120: SA_KILL, /* SIGTERM */
121: SA_IGNORE, /* SIGURG */
122: SA_STOP, /* SIGSTOP */
123: SA_TTYSTOP, /* SIGTSTP */
124: SA_IGNORE|SA_CONT, /* SIGCONT */
125: SA_IGNORE, /* SIGCHLD */
126: SA_TTYSTOP, /* SIGTTIN */
127: SA_TTYSTOP, /* SIGTTOU */
128: SA_IGNORE, /* SIGIO */
129: SA_KILL, /* SIGXCPU */
130: SA_KILL, /* SIGXFSZ */
131: SA_KILL, /* SIGVTALRM */
132: SA_KILL, /* SIGPROF */
133: SA_IGNORE, /* SIGWINCH */
134: SA_IGNORE, /* SIGINFO */
135: SA_KILL, /* SIGUSR1 */
136: SA_KILL, /* SIGUSR2 */
137: };
138:
139: #define stopsigmask (sigmask(SIGSTOP)|sigmask(SIGTSTP)|\
140: sigmask(SIGTTIN)|sigmask(SIGTTOU))
141: #define contsigmask (sigmask(SIGCONT))
142:
143: #endif /* SIGPROP */
144:
145: #define sigcantmask (sigmask(SIGKILL)|sigmask(SIGSTOP))
146:
147: #ifdef KERNEL
148: /*
149: * Machine-independent functions:
150: */
151: void siginit __P((struct proc *p));
152: void execsigs __P((struct proc *p));
153: void gsignal __P((int pgid, int sig));
154: void pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
155: void trapsignal __P((struct proc *p, int sig, unsigned code));
156: void psignal __P((struct proc *p, int sig));
157: int issig __P((struct proc *p));
158: void psig __P((int sig));
159: int coredump __P((struct proc *p));
160:
161: /*
162: * Machine-dependent functions:
163: */
164: void sendsig __P((sig_t action, int sig, int returnmask, unsigned code));
165: #endif /* KERNEL */
166: #endif /* !_SIGNALVAR_H_ */
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