linux守护进程启动程序

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

void daemonize() {
    pid_t pid;

    // Fork off the parent process
    pid = fork();
    if (pid < 0) {
        exit(EXIT_FAILURE);
    }
    if (pid > 0) {
        exit(EXIT_SUCCESS);
    }

    // Create a new session
    if (setsid() < 0) {
        exit(EXIT_FAILURE);
    }

    // Change the working directory to the root directory
    if (chdir("/") < 0) {
        exit(EXIT_FAILURE);
    }

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

void signal_handler(int signum) {
    printf("Daemon received signal %d\n", signum);
}

int main() {
    daemonize();

    // Register signal handlers
    signal(SIGINT, signal_handler);
    signal(SIGTERM, signal_handler);

    // Daemon main loop
    while (1) {
        sleep(1);
    }

    return 0;
}