Receiver.c

#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <semaphore.h>
#include <fcntl.h>
#include <sys/stat.h>


int running = 1;

void sig_handler(int signum)
{
    running = 0;
}

int main(int argc, char** argv)
{
    struct sigaction act;
    memset(&act, 0, sizeof(struct sigaction));
    act.sa_handler = sig_handler;

    if (sigaction(SIGTERM, &act, NULL) == -1)
    {
        fprintf(stdout, "Sigaction failed\n");
        exit(EXIT_FAILURE);
    }

    sem_t* sem = sem_open("semaphore", 0);
    if (sem == SEM_FAILED)
    {
        fprintf(stderr, "Can't open a semaphore\n");
        exit(EXIT_FAILURE);
    }

    while (running)
    {
        sem_wait(sem);
        fprintf(stdout, "%s\n", argv[1]);
        sem_post(sem);
    }

    sem_close(sem);

    exit(EXIT_SUCCESS);
}