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Commit | Line | Data |
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7a255aa9 | 1 | /* |
708605aa JH |
2 | * This file is part of the PulseView project. |
3 | * | |
4 | * Copyright (C) 2013 Adam Reichold | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program 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 | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
7a255aa9 JH |
20 | |
21 | #include "signalhandler.h" | |
22 | ||
23 | #include <signal.h> | |
24 | #include <sys/socket.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #include <QSocketNotifier> | |
28 | ||
708605aa | 29 | int SignalHandler::_sockets[2]; |
7a255aa9 | 30 | |
708605aa | 31 | bool SignalHandler::prepare_signals() |
7a255aa9 | 32 | { |
708605aa JH |
33 | if(socketpair(AF_UNIX, SOCK_STREAM, 0, _sockets) != 0) |
34 | return false; | |
7a255aa9 | 35 | |
708605aa | 36 | struct sigaction sig_action; |
7a255aa9 | 37 | |
708605aa JH |
38 | sig_action.sa_handler = SignalHandler::handle_signals; |
39 | sigemptyset(&sig_action.sa_mask); | |
40 | sig_action.sa_flags = SA_RESTART; | |
7a255aa9 | 41 | |
708605aa JH |
42 | if(sigaction(SIGINT, &sig_action, 0) != 0 || |
43 | sigaction(SIGTERM, &sig_action, 0) != 0) { | |
44 | close(_sockets[0]); | |
45 | close(_sockets[1]); | |
46 | return false; | |
47 | } | |
7a255aa9 | 48 | |
708605aa | 49 | return true; |
7a255aa9 JH |
50 | } |
51 | ||
52 | SignalHandler::SignalHandler(QObject* parent) : QObject(parent), | |
708605aa | 53 | _socket_notifier(0) |
7a255aa9 | 54 | { |
708605aa JH |
55 | _socket_notifier = new QSocketNotifier(_sockets[1], |
56 | QSocketNotifier::Read, this); | |
57 | connect(_socket_notifier, SIGNAL(activated(int)), | |
58 | SLOT(on_socket_notifier_activated())); | |
7a255aa9 JH |
59 | } |
60 | ||
708605aa | 61 | void SignalHandler::on_socket_notifier_activated() |
7a255aa9 | 62 | { |
708605aa JH |
63 | _socket_notifier->setEnabled(false); |
64 | ||
65 | int sig_number; | |
66 | read(_sockets[1], &sig_number, sizeof(int)); | |
67 | ||
68 | switch(sig_number) | |
69 | { | |
70 | case SIGINT: | |
71 | emit int_received(); | |
72 | break; | |
73 | case SIGTERM: | |
74 | emit term_received(); | |
75 | break; | |
76 | } | |
77 | ||
78 | _socket_notifier->setEnabled(true); | |
7a255aa9 JH |
79 | } |
80 | ||
708605aa | 81 | void SignalHandler::handle_signals(int sig_number) |
7a255aa9 | 82 | { |
708605aa | 83 | write(_sockets[0], &sig_number, sizeof(int)); |
7a255aa9 | 84 | } |