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51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
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* Copyright (C) 2021 CutefishOS Team.
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*
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* Author: Reion Wong <reion@cutefishos.com>
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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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* 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 "utils.h"
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#include <QFile>
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Utils::Utils(QObject *parent) : QObject(parent)
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{
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}
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QString Utils::processNameFromPid(uint pid)
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{
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QFile file(QString("/proc/%1/cmdline").arg(pid));
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QString name;
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if (file.open(QIODevice::ReadOnly)) {
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QByteArray cmd = file.readAll();
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if (!cmd.isEmpty()) {
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// extract non-truncated name from cmdline
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int zeroIndex = cmd.indexOf('\0');
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int processNameStart = cmd.lastIndexOf('/', zeroIndex);
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if (processNameStart == -1) {
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processNameStart = 0;
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} else {
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processNameStart++;
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}
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name = QString::fromLocal8Bit(cmd.mid(processNameStart, zeroIndex - processNameStart));
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}
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}
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return name;
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}
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