terminal in a terminal

output.txt

> ruby ./pty-reopen.rb 20

 ┌───────────────────┤ PTY SCREEN 55x20 ├───────────────────┐
 │ > echo 'echoed'                                          │
 │ echoed                                                   │
 │                                                          │
 │ let's run some shit in an inner pty and do some crazy f  │
 │ ormatting. we will run:                                  │
 │ > cat ./ruby-fd-debug.rb                                 │
 │ running...                                               │
 │ ran successfully. printing...                            │
 │                                                          │
 │     1: device = ARGV.first                               │
 │     2: file = File.open(device)                          │
 │     3: io = IO.for_fd(file.fileno)                       │
 │     4: puts "output: #{io.gets(nil)}"                    │
 │     5:                                                   │
 │                                                          │
 │                                                          │
 │ let's write some fake input to the controller and read   │
 │ it back from $stdin                                      │
 │ found input: yo                                          │
 │                                                          │
 └──────────────────────────────────────────────────────────┘