File indexing completed on 2024-04-28 15:20:31

 /*
     This file is part of libkdbus
 
     SPDX-FileCopyrightText: 2019 Harald Sitter <sitter@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include <QCoreApplication>
 #include <QDebug>
 #include <QThread>
 #include <kdbusservice.h>
 
 // sigaction
 #include <signal.h>
 // close
 #include <unistd.h>
 
 // rlimit
 #include <sys/resource.h>
 #include <sys/time.h>
 
 // USR1.
 // Close all sockets and eventually ABRT. This mimics behavior during KCrash
 // handling. Closing all sockets will effectively disconnect us from the bus
 // and result in the daemon reclaiming all our service names and allowing
 // other processes to register them instead.
 void usr1_handler(int signum)
 {
     qDebug() << "usr1" << signum << SIGSEGV;
 
     // Close all remaining file descriptors so we drop off of the bus.
     struct rlimit rlp;
     getrlimit(RLIMIT_NOFILE, &rlp);
     for (int i = 3; i < (int)rlp.rlim_cur; i++) {
         close(i);
     }
 
     // Sleep a bit for good measure. We could actually loop ad infinitum here
     // as after USR1 we are expected to get killed. In the interest of sane
     // behavior we'll simply exit on our own as well though.
     sleep(4);
     abort();
 }
 
 // Simple application under test.
 // Closes all sockets on USR1 and aborts to simulate a kcrash shutdown behavior
 // which can result in a service registration race.
 int main(int argc, char *argv[])
 {
     qDebug() << "hello there!";
 
     struct sigaction action;
 
     action.sa_handler = usr1_handler;
     sigemptyset(&action.sa_mask);
     sigaddset(&action.sa_mask, SIGUSR1);
     action.sa_flags = SA_RESTART;
 
     if (sigaction(SIGUSR1, &action, nullptr) < 0) {
         qDebug() << "failed to register segv handler";
         return 1;
     }
 
     QCoreApplication app(argc, argv);
     QCoreApplication::setApplicationName("kdbussimpleservice");
     QCoreApplication::setOrganizationDomain("kde.org");
 
     KDBusService service(KDBusService::Unique);
     if (!service.isRegistered()) {
         qDebug() << "service not registered => exiting";
         return 1;
     }
     qDebug() << "service registered";
 
     int ret = app.exec();
     qDebug() << "exiting deadservice";
     return ret;
 }