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b688fc87 WJ |
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_ */ |