Gnu/coreutils/tty-invocation
From Get docs
Previous: printenv invocation, Up: Working context [Contents][Index]
19.4 tty: Print file name of terminal on standard input
tty prints the file name of the terminal connected to its standard
input. It prints ‘not a tty’ if standard input is not a terminal.
Synopsis:
tty [option]…
The program accepts the following option. Also see Common options.
- ‘
-s’
‘--silent’
‘--quiet’ Print nothing; only return an exit status.
Exit status:
0 if standard input is a terminal 1 if standard input is a non-terminal file 2 if given incorrect arguments 3 if a write error occurs
