Erlang 19
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8. tty - A Command-Line Interface

8 tty - A Command-Line Interface

tty is a simple command-line interface program where keystrokes are collected and interpreted. Completed lines are sent to the shell for interpretation. A simple history mechanism saves previous lines, which can be edited before sending them to the shell. tty is started when Erlang is started with the following command:

erl

tty operates in one of two modes:

  • Normal mode, in which text lines can be edited and sent to the shell.

  • Shell break mode, which allows the user to kill the current shell, start multiple shells, and so on.

8.1 Normal Mode

In normal mode keystrokes from the user are collected and interpreted by tty. Most of the Emacs line-editing commands are supported. The following is a co