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86b645e7 JS |
1 | /* |
2 | * os-posix.c | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * Copyright (c) 2010 Red Hat, Inc. | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <signal.h> | |
8d963e6a JS |
29 | #include <sys/types.h> |
30 | #include <sys/wait.h> | |
86b645e7 JS |
31 | |
32 | /* Needed early for CONFIG_BSD etc. */ | |
33 | #include "config-host.h" | |
34 | #include "sysemu.h" | |
35 | ||
fe98ac14 | 36 | void os_setup_early_signal_handling(void) |
86b645e7 JS |
37 | { |
38 | struct sigaction act; | |
39 | sigfillset(&act.sa_mask); | |
40 | act.sa_flags = 0; | |
41 | act.sa_handler = SIG_IGN; | |
42 | sigaction(SIGPIPE, &act, NULL); | |
43 | } | |
8d963e6a JS |
44 | |
45 | static void termsig_handler(int signal) | |
46 | { | |
47 | qemu_system_shutdown_request(); | |
48 | } | |
49 | ||
50 | static void sigchld_handler(int signal) | |
51 | { | |
52 | waitpid(-1, NULL, WNOHANG); | |
53 | } | |
54 | ||
55 | void os_setup_signal_handling(void) | |
56 | { | |
57 | struct sigaction act; | |
58 | ||
59 | memset(&act, 0, sizeof(act)); | |
60 | act.sa_handler = termsig_handler; | |
61 | sigaction(SIGINT, &act, NULL); | |
62 | sigaction(SIGHUP, &act, NULL); | |
63 | sigaction(SIGTERM, &act, NULL); | |
64 | ||
65 | act.sa_handler = sigchld_handler; | |
66 | act.sa_flags = SA_NOCLDSTOP; | |
67 | sigaction(SIGCHLD, &act, NULL); | |
68 | } |