TTY(1)                                                                  TTY(1)


NAME
     tty - get the name of the terminal

SYNOPSIS
     tty [ -l ] [ -s ]

DESCRIPTION
     tty prints the path name of the user's terminal.

     -l   prints the synchronous line number to which the user's terminal is
          connected, if it is on an active synchronous line.

     -s   inhibits printing of the terminal path name, allowing one to test
          just the exit code.

                                    EXIT CODES
                      2   if invalid options were specified,
                      0   if standard input is a terminal,
                      1   otherwise.

DIAGNOSTICS
     ``not on an active synchronous line'' if the standard input is not a
     synchronous terminal and -l is specified.
     ``not a tty'' if the standard input is not a terminal and -s is not
     specified.


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