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1 | /* The proper definitions for Linux/MIPS's sigaction. |
2 | Copyright (C) 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2003 | |
3 | Free Software Foundation, Inc. | |
4 | This file is part of the GNU C Library. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
20 | ||
21 | #ifndef _SIGNAL_H | |
22 | # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." | |
23 | #endif | |
24 | ||
25 | /* Structure describing the action to be taken when a signal arrives. */ | |
26 | struct sigaction | |
27 | { | |
28 | /* Special flags. */ | |
29 | unsigned int sa_flags; | |
30 | ||
31 | /* Signal handler. */ | |
32 | #ifdef __USE_POSIX199309 | |
33 | union | |
34 | { | |
35 | /* Used if SA_SIGINFO is not set. */ | |
36 | __sighandler_t sa_handler; | |
37 | /* Used if SA_SIGINFO is set. */ | |
38 | void (*sa_sigaction) (int, siginfo_t *, void *); | |
39 | } | |
40 | __sigaction_handler; | |
41 | # define sa_handler __sigaction_handler.sa_handler | |
42 | # define sa_sigaction __sigaction_handler.sa_sigaction | |
43 | #else | |
44 | __sighandler_t sa_handler; | |
45 | #endif | |
46 | /* Additional set of signals to be blocked. */ | |
47 | __sigset_t sa_mask; | |
48 | ||
49 | /* The ABI says here are two unused ints following. */ | |
50 | /* Restore handler. */ | |
51 | void (*sa_restorer) (void); | |
52 | ||
53 | #if _MIPS_SZPTR < 64 | |
54 | int sa_resv[1]; | |
55 | #endif | |
56 | }; | |
57 | ||
58 | /* Bits in `sa_flags'. */ | |
59 | /* Please note that some Linux kernels versions use different values for these | |
60 | flags which is a bug in those kernel versions. */ | |
61 | #define SA_NOCLDSTOP 0x00000001 /* Don't send SIGCHLD when children stop. */ | |
62 | #define SA_NOCLDWAIT 0x00010000 /* Don't create zombie on child death. */ | |
63 | #define SA_SIGINFO 0x00000008 /* Invoke signal-catching function with | |
64 | three arguments instead of one. */ | |
65 | #if defined __USE_UNIX98 || defined __USE_MISC | |
66 | # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ | |
67 | # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ | |
68 | # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ | |
69 | # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when | |
70 | its handler is being executed. */ | |
71 | #endif | |
72 | #ifdef __USE_MISC | |
73 | # define SA_INTERRUPT 0x20000000 /* Historical no-op. */ | |
74 | ||
75 | /* Some aliases for the SA_ constants. */ | |
76 | # define SA_NOMASK SA_NODEFER | |
77 | # define SA_ONESHOT SA_RESETHAND | |
78 | # define SA_STACK SA_ONSTACK | |
79 | #endif | |
80 | ||
81 | /* Values for the HOW argument to `sigprocmask'. */ | |
82 | #define SIG_NOP 0 /* 0 is unused to catch errors */ | |
83 | #define SIG_BLOCK 1 /* Block signals. */ | |
84 | #define SIG_UNBLOCK 2 /* Unblock signals. */ | |
85 | #define SIG_SETMASK 3 /* Set the set of blocked signals. */ | |
86 | #ifdef __USE_MISC | |
87 | # define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility: | |
88 | set only the low 32 bit of the sigset. */ | |
89 | #endif |