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cli.cpp
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cli.cpp
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/*
* SPDX-License-Identifier: Apache-2.0
* Copyright (C) 2020 Raspberry Pi Ltd
*/
#include "cli.h"
#include "imagewriter.h"
#include <iostream>
#include <QCoreApplication>
#include <QCommandLineParser>
#include <QFileInfo>
#include "drivelistmodel.h"
#include "dependencies/drivelist/src/drivelist.hpp"
/* Message handler to discard qDebug() output if using cli (unless --debug is set) */
static void devnullMsgHandler(QtMsgType, const QMessageLogContext &, const QString &)
{
}
Cli::Cli(int &argc, char *argv[]) : QObject(nullptr)
{
#ifdef Q_OS_WIN
/* Allocate console on Windows (only needed if compiled as GUI program) */
if (::AttachConsole(ATTACH_PARENT_PROCESS) || ::AllocConsole())
{
freopen("CONOUT$", "w", stdout);
freopen("CONOUT$", "w", stderr);
std::ios::sync_with_stdio();
}
#endif
_app = new QCoreApplication(argc, argv);
_app->setOrganizationName("Raspberry Pi");
_app->setOrganizationDomain("raspberrypi.org");
_app->setApplicationName("Imager");
_imageWriter = new ImageWriter;
connect(_imageWriter, &ImageWriter::success, this, &Cli::onSuccess);
connect(_imageWriter, &ImageWriter::error, this, &Cli::onError);
connect(_imageWriter, &ImageWriter::preparationStatusUpdate, this, &Cli::onPreparationStatusUpdate);
connect(_imageWriter, &ImageWriter::downloadProgress, this, &Cli::onDownloadProgress);
connect(_imageWriter, &ImageWriter::verifyProgress, this, &Cli::onVerifyProgress);
}
Cli::~Cli()
{
delete _imageWriter;
delete _app;
}
int Cli::main()
{
QCommandLineParser parser;
QCommandLineOption cli("cli");
parser.addOption(cli);
QCommandLineOption disableVerify("disable-verify", "Disable verification");
parser.addOption(disableVerify);
QCommandLineOption writeSystemDrive("enable-writing-system-drives", "Only use this if you know what you are doing");
parser.addOption(writeSystemDrive);
QCommandLineOption sha256Option("sha256", "Expected hash", "sha256", "");
parser.addOption(sha256Option);
QCommandLineOption debugOption("debug", "Output debug messages to console");
parser.addOption(debugOption);
QCommandLineOption quietOption("quiet", "Only write to console on error");
parser.addOption(quietOption);
parser.addPositionalArgument("src", "Image file/URL");
parser.addPositionalArgument("dst", "Destination device");
parser.process(*_app);
const QStringList args = parser.positionalArguments();
if (args.count() != 2)
{
std::cerr << "Usage: --cli [--disable-verify] [--sha256 <expected hash>] [--debug] [--quiet] <image file to write> <destination drive device>" << std::endl;
return 1;
}
if (!parser.isSet(debugOption))
{
qInstallMessageHandler(devnullMsgHandler);
}
_quiet = parser.isSet(quietOption);
if (args[0].startsWith("http:", Qt::CaseInsensitive) || args[0].startsWith("https:", Qt::CaseInsensitive))
{
_imageWriter->setSrc(args[0], 0, 0, parser.value(sha256Option).toLatin1() );
}
else
{
QFileInfo fi(args[0]);
if (fi.isFile())
{
_imageWriter->setSrc(QUrl::fromLocalFile(args[0]), fi.size(), 0, parser.value(sha256Option).toLatin1() );
}
else if (!fi.exists())
{
std::cerr << "Error: source file does not exists" << std::endl;
return 1;
}
else
{
std::cerr << "Error: source is not a regular file" << std::endl;
return 1;
}
}
if (parser.isSet(writeSystemDrive))
{
std::cerr << "WARNING: writing to system drives is enabled." << std::endl;
}
else
{
DriveListModel dlm;
dlm.processDriveList(Drivelist::ListStorageDevices() );
bool foundDrive = false;
int numDrives = dlm.rowCount( QModelIndex() );
for (int i = 0; i < numDrives; i++)
{
if (dlm.index(i, 0).data(dlm.deviceRole) == args[1])
{
foundDrive = true;
break;
}
}
if (!foundDrive)
{
std::cerr << "Destination drive is not in list of removable volumes. Choose one of the following:" << std::endl << std::endl;
for (int i = 0; i < numDrives; i++)
{
QModelIndex idx = dlm.index(i, 0);
QByteArray line = idx.data(dlm.deviceRole).toByteArray()+" ("+idx.data(dlm.descriptionRole).toByteArray()+")";
std::cerr << line.constData() << std::endl;
}
std::cerr << std::endl << "Or use --enable-writing-system-drives to overrule." << std::endl;
return 1;
}
}
_imageWriter->setDst(args[1]);
_imageWriter->setVerifyEnabled(!parser.isSet(disableVerify));
/* Run startWrite() in event loop (otherwise calling _app->exit() on error does not work) */
QTimer::singleShot(1, _imageWriter, &ImageWriter::startWrite);
return _app->exec();
}
void Cli::onSuccess()
{
if (!_quiet)
{
_clearLine();
std::cerr << "Write successful." << std::endl;
}
_app->exit(0);
}
void Cli::_clearLine()
{
/* Properly clearing line requires platform specific code.
Just write some spaces for now, and return to beginning of line. */
std::cerr << " \r";
}
void Cli::onError(QVariant msg)
{
QByteArray m = msg.toByteArray();
if (!_quiet)
{
_clearLine();
}
std::cerr << "Error: " << m.constData() << std::endl;
_app->exit(1);
}
void Cli::onDownloadProgress(QVariant dlnow, QVariant dltotal)
{
_printProgress("Writing", dlnow, dltotal);
}
void Cli::onVerifyProgress(QVariant now, QVariant total)
{
_printProgress("Verifying", now, total);
}
void Cli::onPreparationStatusUpdate(QVariant msg)
{
if (!_quiet)
{
QByteArray ascii = QByteArray(" ")+msg.toByteArray()+"\r";
_clearLine();
std::cerr << ascii.constData();
}
}
void Cli::_printProgress(const QByteArray &msg, QVariant now, QVariant total)
{
if (_quiet)
return;
float n = now.toFloat();
float t = total.toFloat();
if (t)
{
int percent = n/t*100;
if (percent != _lastPercent || msg != _lastMsg)
{
QByteArray txt = QByteArray(" ")+msg+": ["+QByteArray(percent/5, '-')+'>'+QByteArray(20-percent/5, ' ')+"] "+QByteArray::number(percent)+" %\r";
std::cerr << txt.constData();
_lastPercent = percent;
_lastMsg = msg;
}
}
else if (msg != _lastMsg)
{
std::cerr << msg.constData() << "\r";
_lastMsg = msg;
}
}