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78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* pm-inhibit - Power Management Inhibition Tool
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* Copyright (C) 2022 Damien Goutte-Gattat
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "inhibitor.h"
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#include <QDBusConnection>
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#include <QDBusInterface>
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#include <QDBusReply>
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#define LOGIN1_NAME "org.freedesktop.login1"
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#define LOGIN1_PATH "/org/freekdesktop/login1"
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#define INHIBIT_NAME "org.freedesktop.PowerManagement.Inhibit"
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#define INHIBIT_PATH "/org/freedesktop/PowerManagement/Inhibit"
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Inhibitor::Inhibitor(const QString& program, const QString& reason)
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{
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m_cookie = nullptr;
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m_fallbackCookie = 0;
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/* First try the modern login1 interface. */
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QDBusInterface manager(LOGIN1_NAME, LOGIN1_PATH,
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LOGIN1_NAME ".Manager", QDBusConnection::systemBus());
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QDBusReply<QDBusUnixFileDescriptor> reply = manager.call("Inhibit",
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"idle", program, reason, "block");
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if ( reply.isValid() ) {
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/* We need a copy of the file descriptor to prevent the lock from
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* being automatically released at the end of the current scope. */
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m_cookie = new QDBusUnixFileDescriptor(reply.value());
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}
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else {
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/* Fallback to the old PowerManagement interface. */
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QDBusInterface inhibit(INHIBIT_NAME, INHIBIT_PATH, INHIBIT_NAME,
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QDBusConnection::sessionBus());
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QDBusReply<unsigned> reply = inhibit.call("Inhibit", program, reason);
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if ( reply.isValid() ) {
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m_fallbackCookie = reply.value();
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}
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}
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}
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Inhibitor::~Inhibitor()
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{
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if ( m_cookie != nullptr ) {
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/* Deleting this object will close the associated file
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* descriptor, which will in turn release the lock. */
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delete m_cookie;
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}
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else if ( m_fallbackCookie != 0 ) {
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/* If we had to use the old interface to acquire the lock, it
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* has to be explicitly released. */
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QDBusInterface inhibit(INHIBIT_NAME, INHIBIT_PATH, INHIBIT_NAME,
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QDBusConnection::sessionBus());
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inhibit.call("UnInhibit", m_fallbackCookie);
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}
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}
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bool
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Inhibitor::isInhibited()
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{
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return m_cookie != nullptr || m_fallbackCookie != 0;
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}
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