main.cc

#include <signal.h>
#include <sys/types.h>
#include <errno.h>
#include <cstdlib>
#include <cstdio>
#include <unistd.h>

volatile int stop = 0;

void handler (int)
{
  printf("Exiting...\n");
  stop = 1;
}

int main(void) {
  struct sigaction s;
  s.sa_handler = handler;
  sigemptyset(&s.sa_mask);
  s.sa_flags = 0;
  sigaction(SIGINT, &s, NULL);

  fd_set set;
  FD_ZERO(&set);
  FD_SET(0, &set);

  while(!stop) {
    while (((select(1, &set, 0, 0, 0)) < 0) && (errno == EINTR) && !stop);
    if (stop)
      exit(0);

    char buffer[1024] = {};
    int n = read(0, buffer, 1024);
    buffer[n] = 0;
    printf("%s\n", buffer);
  }

    return 0;
}