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#include "process.h"
#include <QCoreApplication>
#include <unistd.h>
#include <QDebug>
#include <QFile>
#include <QSocketNotifier>
#include <sys/socket.h>
#include <signal.h>
#include <fcntl.h>
#include <QFileInfo>
static int pipefd[2];
static void signalhandler(int)
{
write(pipefd[1], " ", 1);
}
static bool analyzeBinary(const QString &binary)
{
QFileInfo fi(binary);
if (!fi.exists()) {
printf("Binary does not exist.\n");
return false;
}
if (!fi.isFile()) {
printf("Binary is not a file.\n");
return false;
}
if (!fi.isReadable()) {
printf("Binary is not readable.\n");
return false;
}
if (!fi.isExecutable()) {
printf("Binary is not executable.\n");
return false;
}
if (fi.size() < 4) {
printf("Binary is smaller than 4 bytes.\n");
return false;
}
QFile f(binary);
if (!f.open(QFile::ReadOnly)) {
printf("Could not open binary to analyze.\n");
return false;
}
QByteArray elfHeader = f.read(4);
f.close();
if (elfHeader.size() < 4) {
printf("Failed to read ELF header.\n");
return false;
}
if (elfHeader != QByteArray::fromHex("7f454C46")) { // 0x7f ELF
printf("Binary is not an ELF file.\n");
return false;
}
return true;
}
Process::Process()
: QObject(0)
, mProcess(new QProcess(this))
, mDebuggee(0)
, mDebug(false)
{
mProcess->setProcessChannelMode(QProcess::SeparateChannels);
connect(mProcess, SIGNAL(readyReadStandardError()), this, SLOT(readyReadStandardError()));
connect(mProcess, SIGNAL(readyReadStandardOutput()), this, SLOT(readyReadStandardOutput()));
connect(mProcess, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(finished(int, QProcess::ExitStatus)));
connect(mProcess, SIGNAL(error(QProcess::ProcessError)), this, SLOT(error(QProcess::ProcessError)));
connect(mProcess, SIGNAL(finished(int, QProcess::ExitStatus)), qApp, SLOT(quit()));
if (pipe2(pipefd, O_CLOEXEC) != 0)
qWarning("Could not create pipe");
QSocketNotifier *n = new QSocketNotifier(pipefd[0], QSocketNotifier::Read, this);
connect(n, SIGNAL(activated(int)), this, SLOT(stop()));
signal(SIGINT, signalhandler);
signal(SIGTERM, signalhandler);
signal(SIGHUP, signalhandler);
signal(SIGPIPE, signalhandler);
}
Process::~Process()
{
close(pipefd[0]);
close(pipefd[1]);
}
void Process::readyReadStandardOutput()
{
QByteArray b = mProcess->readAllStandardOutput();
write(1, b.constData(), b.size());
if (mConfig.flags.testFlag(Config::PrintDebugMessages))
qDebug() << b;
}
void Process::readyReadStandardError()
{
QByteArray b = mProcess->readAllStandardError();
if (mDebug) {
int index = b.indexOf(" created; pid = ");
if (index >= 0) {
mDebuggee = QString::fromLatin1(b.mid(index+16)).toUInt();
}
mDebug = false; // only search once
}
write(2, b.constData(), b.size());
if (mConfig.flags.testFlag(Config::PrintDebugMessages))
qDebug() << b;
}
void Process::setDebug()
{
mDebug = true;
}
void Process::error(QProcess::ProcessError error)
{
switch (error) {
case QProcess::FailedToStart:
printf("Failed to start\n");
analyzeBinary(mBinary);
break;
case QProcess::Crashed:
printf("Crashed\n");
break;
case QProcess::Timedout:
printf("Timedout\n");
break;
case QProcess::WriteError:
printf("Write error\n");
break;
case QProcess::ReadError:
printf("Read error\n");
break;
case QProcess::UnknownError:
printf("Unknown error\n");
break;
}
qApp->quit();
}
void Process::finished(int exitCode, QProcess::ExitStatus exitStatus)
{
if (exitStatus == QProcess::NormalExit)
qDebug() << "Process exited with exitcode" << exitCode;
else
qDebug() << "Process stopped";
}
void Process::startup(QStringList args)
{
QProcessEnvironment pe = QProcessEnvironment::systemEnvironment();
foreach (const QString &key, mConfig.env.keys()) {
qDebug() << key << mConfig.env.value(key);
pe.insert(key, mConfig.env.value(key));
}
if (!mConfig.base.isEmpty())
pe.insert(QLatin1String("B2QT_BASE"), mConfig.base);
if (!mConfig.platform.isEmpty())
pe.insert(QLatin1String("B2QT_PLATFORM"), mConfig.platform);
args.append(mConfig.args);
mProcess->setProcessEnvironment(pe);
mBinary = args.first();
args.removeFirst();
qDebug() << mBinary << args;
mProcess->start(mBinary, args);
}
void Process::start(const QStringList &args)
{
startup(args);
}
void Process::stop()
{
if (mProcess->state() == QProcess::QProcess::NotRunning) {
qDebug() << "No process running";
qApp->exit();
return;
}
if (mDebuggee != 0) {
qDebug() << "Kill debuggee " << mDebuggee;
if (kill(mDebuggee, SIGKILL) != 0)
perror("Could not kill debugee");
}
if (kill(-getpid(), SIGTERM) != 0)
perror("Could not kill process group");
mProcess->terminate();
if (!mProcess->waitForFinished())
mProcess->kill();
}
void Process::incomingConnection(int i)
{
accept(i, NULL, NULL);
stop();
}
void Process::setSocketNotifier(QSocketNotifier *s)
{
connect(s, SIGNAL(activated(int)), this, SLOT(incomingConnection(int)));
}
void Process::setConfig(const Config &config)
{
mConfig = config;
}
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