lcd_display_service.c

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/*
 ============================================================================
 Name        : lcdDisplayService.c
 ============================================================================
 */

#include "skn_network_helpers.h"
#include "skn_rpi_helpers.h"


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

    int index = 0;
    pthread_t sig_thread;
    sigset_t signal_set;
    long l_thread_complete = 0;

    char request[SZ_INFO_BUFF];

    memset(request, 0, sizeof(request));
    snprintf(request, sizeof(request), "%02ld Cpus Online.", skn_get_number_of_cpu_cores() );

    skn_program_name_and_description_set(
            "lcd_display_service",
            "LCD 4x20 Display Provider."
            );

    /* Parse any command line options,
     * - check request string override */
    if (skn_handle_display_command_line(argc, argv) == EXIT_FAILURE) {
        exit(EXIT_FAILURE);
    }
    if (gd_pch_message != NULL) {
        strncpy(request, gd_pch_message, (SZ_INFO_BUFF - 1));
        free(gd_pch_message); // from strdup()
        gd_pch_message = request;
    } else if (argc == 2) {
        strcpy(request, argv[1]);
    }
    skn_get_userids();
    skn_logger(SD_NOTICE, "%s-%s is in startup mode as user(%s)", gd_ch_program_name, PACKAGE_VERSION, gd_pch_effective_userid);

    skn_logger(SD_DEBUG, "Welcome Message [%s]", request);

    /*
     * Set the global interface name and ip address parms */
    get_default_interface_name_and_ipv4_address(gd_ch_intfName, gd_ch_ipAddress);

    /*
    * Setup signal handling before we start
    */
    if (skn_signal_manager_startup(&sig_thread, &signal_set, &l_thread_complete) == EXIT_FAILURE ) {
      exit(EXIT_FAILURE);
    }

    /* **********************************************
    * Do Work Forever
    * - initialize needed resources
    * - start user threads
    */

    /*
     * Do the marvelous work of putting message on display */
    skn_display_manager_do_work(request);

    /*
    * Free any allocated resources before exiting
    * - collect user threads
    * - close open resources
    */
    skn_logger(SD_NOTICE, "Application beginning orderly shutdown...");

    /*
    * Cleanup signal handler before exit
    */
    index = skn_signal_manager_shutdown(sig_thread, &signal_set, &l_thread_complete);

    skn_logger(SD_NOTICE, "\n============================\nShutdown Complete\n============================\n");

    exit(index);
}