handling signal using c

#include

#include

#include

#include

void sig_handler(int signo)

{

    if (signo == SIGUSR1)

        printf("received SIGUSR1\n");

    else if (signo == SIGKILL)

        printf("received SIGKILL\n");

    else if (signo == SIGSTOP)

        printf("received SIGSTOP\n");

}

int main(void)

{

     printf("PID:--->"+getpid());

    if (signal(SIGUSR1, sig_handler) == SIG_ERR)

        printf("\ncan't catch SIGUSR1\n");

    if (signal(SIGKILL, sig_handler) == SIG_ERR)

        printf("\ncan't catch SIGKILL\n");

    if (signal(SIGSTOP, sig_handler) == SIG_ERR)

        printf("\ncan't catch SIGSTOP\n");

    // A long long wait so that we can easily issue a signal to this process

    while(1)

        sleep(1);

    return 0;

}