The curses library also uses timeouts when interpreting terminal input. The experiment could be done with other sequences like your ^[[3~ but a 3-character one is easier to type. ANSI escape codes can be used to style the output of echo or printf. Share on: Edit on: Previous Section Next Section. Print colored output text or change text background color in Linux terminal using escape. These are not traditional vi options in traditional vi an escape is just an escape and arrow keys are useless. Style Your Terminal Text With Escape codes (or Sequences) In Linux. Do :set noesckeys and it will never act like the arrow key (even when you actually press the arrow key) - this is the price you must pay if you want the response to the escape key to be instant. Terminal emulators encode keyboard input as ANSI escape sequences. For coloring, I use couleurs and for unstyling I use ansi-parser. Qix - MONICA WAS MISTREATED at 20:21 Qix It's not about styling, it's about unstyling - removing the ANSI styles from strings. Type the same thing slowly, and it will do something different. It checks for colors being enabled or not and will automatically strip ANSI codes from your text. If you're fast enough, and your terminal settings aren't too exotic, one of them will act like the up arrow key. You can test this by typing Esc O A or Esc [ A really fast in vim. These are not traditional vi options in traditional vi an escape is just an escape and arrow keys are useless. In vim, the options esckeys, ttimeout, and ttimeoutlen determine whether and how long to wait for an escape sequence to complete. If the characters arrive in a short enough time span, it's unlikely that they were typed individually.
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