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// Copyright (c) 2001  David Muse
// See the file COPYING for more information

#include <rudiments/daemonprocess.h>
#include <rudiments/permissions.h>
#include <rudiments/process.h>
#include <rudiments/file.h>
#include <rudiments/snooze.h>

#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

#ifdef RUDIMENTS_NAMESPACE
using namespace rudiments;
#endif

daemonprocess   *dmn;

// define a function to shut down the process cleanly
RETSIGTYPE      shutDown() {

        printf("%d: shutting down\n",process::getProcessId());

        // clean up
        delete dmn;
        file::remove("/tmp/dmn.pidfile");
        exit(0);
}

int main(int argc, const char **argv) {

        dmn=new daemonprocess();

        // set up signal handlers for clean shutdown
        dmn->handleShutDown((RETSIGTYPE *)shutDown);
        dmn->handleCrash((RETSIGTYPE *)shutDown);

        // change the user/group that the daemon is running as
        dmn->runAsUser("nobody");
        dmn->runAsGroup("nobody");

        // make sure that only one instance is running
        int    pid=dmn->checkForPidFile("/tmp/dmn.pidfile");
        if (pid>-1) {
                printf("Sorry, an instance of this daemon is already running with process id: %d\n",pid);
                delete dmn;
                exit(0);
        }

        // detach from the controlling terminal
        dmn->detach();

        // create a pid file which is used to make sure that only one instance
        // is running and can also be used to kill the process
        dmn->createPidFile("/tmp/dmn.pidfile",permissions::ownerReadWrite());

        if (!fork()) {
                for (;;) {
                        printf("%d: child looping...\n",
                                process::getProcessId());
                        snooze::macrosnooze(1);
                }
        }

        // loop, printing "looping..." once per second
        for (;;) {
                printf("%d: parent looping...\n",
                                process::getProcessId());
                snooze::macrosnooze(1);
        }
}

[root@localhost sqlrelay]# ./a.out
./a.out: error while loading shared libraries: librudiments-0.32.so.1: cannot open shared object file: No such file or directory

g++ test.cpp  -I/usr/local/rudiments/include/ -L/usr/local/rudiments/lib -lrudiments