util_cat:
   pusha

   call disk_clear_file_buffer
   mov si, user_input
   ; TODO make this more consistent to account for double spaces
   add si, 4   ; Move si to after 'CAT'

   call disk_load_file
   mov si, file_buffer
   mov cx, [file_length]
   call text_print_raw

   popa
   ret

util_ls:
   pusha

   call disk_clear_output_buffer
   call disk_list_contents

   mov si, output_buffer
   call os_print_string

   popa
   ret