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#include <QCoreApplication>
#include <QFile>
#include <QDebug>
#include <errno.h>
#include <unistd.h>
#include <QStringList>
#define PID_FILE "/data/user/.appcontroller"
static void loadDefaults(QStringList &defaultArgs)
{
QFile f("/system/bin/appdaemon.conf");
if (!f.open(QFile::ReadOnly)) {
qWarning("Could not read config file.");
return;
}
while (!f.atEnd()) {
QString line = f.readLine();
if (line.startsWith("env=")) {
QString sub = line.mid(4).simplified();
int index = sub.indexOf('=');
if (index < 2) {
// ignore
} else {
setenv(sub.left(index).toLocal8Bit().constData(), sub.mid(index+1).toLocal8Bit().constData(), 1);
qDebug() << sub.left(index) << sub.mid(index+1);
}
} else if (line.startsWith("append=")) {
defaultArgs += line.mid(7).simplified();
qDebug() << defaultArgs;
}
}
// env=...
// append=...
}
static pid_t lastPID()
{
QFile f(PID_FILE);
if (!f.open(QFile::ReadOnly)) {
qDebug() << "Could not open" << f.fileName();
return 0;
}
bool ok;
pid_t pid = f.readAll().toUInt(&ok);
f.close();
if (!ok)
qFatal("Invalid last PID.");
return pid;
}
static void stop()
{
pid_t pid = lastPID();
if (pid == 0)
return;
int rc = ::kill(pid, SIGTERM);
if (rc != 0) {
if (errno == ESRCH)
return;
else
qFatal("Kill not permitted/invalid");
}
sleep(1);
rc = ::kill(pid, SIGKILL);
if (rc != 0) {
if (errno == ESRCH)
return;
else
qFatal("Kill not permitted/invalid");
}
}
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
QStringList defaultArgs;
QString binary;
QStringList args = app.arguments();
args.removeFirst();
if (args.size() == 0)
qFatal("No arguments given.");
while (!args.isEmpty()) {
if (args[0] == "--start") {
if (args.size() < 2) {
qFatal("--start requires and argument");
}
binary = args[1];
args.removeFirst();
if (binary.isEmpty())
qFatal("App path is empty");
stop();
loadDefaults(defaultArgs);
} else if (args[0] == "--stop") {
stop();
return 0;
} else {
qFatal("unknown argument: %s", args.first().toLocal8Bit().constData());
}
args.removeFirst();
}
defaultArgs.push_front(binary);
char **arglist = new char*[defaultArgs.size()+1];
for (int i = 0; i < defaultArgs.size(); i++) {
arglist[i] = strdup(defaultArgs[i].toLocal8Bit().constData());
}
arglist[defaultArgs.size()] = 0;
defaultArgs.clear();
QFile f(PID_FILE);
if (!f.open(QFile::WriteOnly))
qDebug() << "Could not write PID";
f.write(QString::number(getpid()).toLatin1());
f.close();
execv(binary.toLocal8Bit().constData(), arglist);
return 0;
}
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