#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

int notAVowel(char c) {
  char vowels[10] = {'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'};
  int index = 0;
  while (index < 10) {
    if (c == vowels[index])
      return 0;
    index++;
  }
  return 1;
}
int main(int argc, char **argv) {
  int pipeUno[2];
  pid_t pid1, pid2;
  if (argc != 2)
    perror("Invalid argument number(inset one)"), exit(-1);

  if (pipe(pipeUno) < 0)
    perror("Pipe"), exit(-1);

  if ((pid1 = fork()) < 0)
    perror("Fork"), exit(-1);
  if (pid1 == 0) { /*figlio 1*/
    char buffer[1];
    int fileDesc;
    close(pipeUno[1]);
    if ((fileDesc = open(argv[1], O_WRONLY | O_APPEND)) < 0)
      perror("Can't open file (writing)"), exit(-1);
    while (read(pipeUno[0], buffer, 1)) {
      if (notAVowel(buffer[0])) {
        write(fileDesc, buffer, 1);
      }
    }
    close(pipeUno[1]);
    close(fileDesc);
  } else {
    if ((pid2 = fork()) < 0)
      perror("Fork 2"), exit(-1);
    if (pid2 == 0) { /* figlio 2*/
      int fileDescriptor;
      char buffer[1];
      if ((fileDescriptor = open(argv[1], O_RDONLY)) < 0)
        perror("Can't open file"), exit(-1);
      close(pipeUno[0]);
      while (read(fileDescriptor, buffer, 1)) {
        write(pipeUno[1], buffer, 1);
      }
      close(pipeUno[1]);
      close(fileDescriptor);
    }
  }
  return 0;
}