The daemon does not stop on Linux

Question

I used the following guide (http://peterlombardo.wikidot.com/linux-daemon-in-c), and it works fine and beautifully, admits that it does not kill.

main.cpp

//Global Directives
//#define DEBUG 1
#define DAE_NAME "dae"
#define DAE_PID "/var/run/dae.pid"

//Includes
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <sstream>
#include <string>
#include <fstream>
#include <iomanip>
#include <vector>
#include <syslog.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <signal.h>

//Namespace (System)
using namespace std;

//Classes
#include "class.h"

//Structures
#include "struct/struct.h"

//Functions
#include "function/signal_handler.h"

void usage(int argc, char *argv[]) {
    if (argc >=1) {
        printf("Usage: %s -h -nn", argv[0]);
        printf("  Options:n");
        printf("      -ntDon't fork off as a daemon.n");
        printf("      -htShow this help screen.n");
        printf("n");
    }
}

int main(int argc, char *argv[]) {

#if defined(DEBUG)
    int daemonize = 0;
#else
    int daemonize = 1;
#endif

    // Setup signal handling before we start
    signal(SIGHUP, signal_handler);
    signal(SIGTERM, signal_handler);
    signal(SIGINT, signal_handler);
    signal(SIGQUIT, signal_handler);

    //Print Usage Information
    int c;
    while((c = getopt(argc, argv, "nh|help")) != -1) {
        switch(c){
            case 'h':
             usage(argc, argv);
                exit(0);
                break;
            case 'n':
                daemonize = 0;
                break;
            default:
             usage(argc, argv);
                exit(0);
                break;
        }
    }

    // Setup syslog logging
#if defined(DEBUG)
    setlogmask(LOG_UPTO(LOG_DEBUG));
    openlog(DAE_NAME, LOG_CONS | LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_USER);
#else
    setlogmask(LOG_UPTO(LOG_INFO));
    openlog(DAE_NAME, LOG_CONS, LOG_USER);
#endif

    //------------
    //Daemon Setup
    //------------
    pid_t pid, sid;

    if (daemonize) {
        syslog(LOG_INFO, "Starting %s", DAE_NAME);

        /* Fork off the parent process */
        pid = fork();
        if (pid < 0) {
            exit(EXIT_FAILURE);
        }
        /* If we got a good PID, then
           we can exit the parent process. */
        if (pid > 0) {
            exit(EXIT_SUCCESS);
        }

        /* Change the file mode mask */
        umask(0);

        /* Create a new SID for the child process */
        sid = setsid();
        if (sid < 0) {
            /* Log the failure */
            exit(EXIT_FAILURE);
        }

        /* Change the current working directory */
        if ((chdir("/")) < 0) {
            /* Log the failure */
            exit(EXIT_FAILURE);
        }

        /* Close out the standard file descriptors */
        close(STDIN_FILENO);
        close(STDOUT_FILENO);
        close(STDERR_FILENO);
    }

    int count = 1;

    //-------
    //Process
    //-------
    while (1){
        process();

        syslog (LOG_INFO, "%s Processed(%s, %d)", DAE_NAME, getlogin(), count);

        count++;
    }

    syslog (LOG_INFO, "Exiting Daemon %s", DAE_NAME);

    closelog (); //Close the Connection

    exit(EXIT_SUCCESS);
}

singal_handler.h

#ifndef SIGNAL_HANDLER_H_
#define SIGNAL_HANDLER_H_

void signal_handler(int sig) {

    switch(sig) {
        case SIGHUP:
            syslog(LOG_WARNING, "Received SIGHUP signal.", DAE_NAME);
            break;
        case SIGTERM:
            syslog(LOG_WARNING, "Received SIGTERM signal.", DAE_NAME);
            break;
        default:
            syslog(LOG_WARNING, "Unhandled signal ", DAE_NAME);
            break;
    }
}

#endif

Command line

So, on the command line, I ran this

./De

And then I ran

kill procid

Magazines

INFROMATICS, the beginning of dae

INFORMATION, dae Processed ((null), 1)

INFORMATION, dae Processed ((null), 2)

INFORMATION, dae Processed ((null), 3)

WARNING, received SIGTERM signal.

INFORMATION, dae Processed ((null), 4)

INFORMATION, dae Processed ((null), 5)

Damn thing doesn't stop? Any ideas thanks

Answer 1

TERM, .

exit() .

, atexit():

signal_handler.h

#ifndef SIGNAL_HANDLER_H_
#define SIGNAL_HANDLER_H_

extern bool g_terminated;

void signal_handler(int sig) {

    switch(sig) {
        case SIGHUP:
            syslog(LOG_WARNING, "Received SIGHUP signal.", DAE_NAME);
            break;
        case SIGTERM:
            syslog(LOG_WARNING, "Received SIGTERM signal.", DAE_NAME);
            g_terminated = true;
            break;
        default:
            syslog(LOG_WARNING, "Unhandled signal ", DAE_NAME);
            break;
    }
}

#endif

main.cpp

bool g_terminated = false;

int main(int argc, char *argv[])
{
    .
    .
    .

    //-------
    //Process
    //-------
    while (!g_terminated) {
        process();

        syslog (LOG_INFO, "%s Processed(%s, %d)", DAE_NAME, getlogin(), count);

        count++;
    }

    // Cleanup...

    exit(EXIT_SUCCESS);
}