66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
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/*
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Copyright (C) 2021 Srivats P.
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This file is part of "Ostinato"
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This 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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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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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 "linuxutils.h"
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#include <QFile>
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#include <QTextStream>
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// Reads a text file (size < 4K) and returns content as a string
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// A terminating \n will be removed
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// There's no way to distinguish an empty file and error while reading
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QString readTextFile(QString fileName)
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{
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QFile file(fileName);
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if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
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qWarning("Can't read %s", qUtf8Printable(fileName));
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return QString();
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}
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if (file.size() > 4096) {
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qWarning("Can't read %s - too large (%lld)",
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qUtf8Printable(fileName), file.size());
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return QString();
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}
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QTextStream in(&file);
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QString text = in.readAll();
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file.close();
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if (text.endsWith('\n'))
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text.chop(1);
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return text;
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}
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// Reads value from /sys/class/net/<device>/<attrib-path>
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// and returns as string
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// XXX: reading from sysfs is discouraged
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QString sysfsAttrib(const char *device, const char *attribPath)
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{
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return readTextFile(QString("/sys/class/net/%1/%2")
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.arg(device).arg(attribPath));
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}
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// Convenience overload
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QString sysfsAttrib(QString device, const char *attribPath)
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{
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return sysfsAttrib(qPrintable(device), attribPath);
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}
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