jgor@ubuntu-lab:~$ cat name.c
#include <stdio.h>

int main() {
  char buf[32];

  printf("input your name:\n");
  scanf("%s", buf);
  printf("your name is %s\n", buf);

  return 0;
}

jgor@ubuntu-lab:~$ gcc -o name name.c
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$ ./name
input your name:
foo
your name is foo
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$ echo foo | ./name
input your name:
your name is foo
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$ socat TCP-LISTEN:1337,fork,reuseaddr EXEC:"./name" &
[1] 8877
jgor@ubuntu-lab:~$ nc 127.0.0.1 1337
foo
input your name:
your name is foo
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$
jgor@ubuntu-lab:~$ echo foo | nc 127.0.0.1 1337
jgor@ubuntu-lab:~$