NAME
tty —
return user's terminal
name
SYNOPSIS
DESCRIPTION
The
tty utility writes the name of the terminal attached to
standard input to standard output. The name that is written is the string
returned by
ttyname(3). If the
standard input is not a terminal, the message ``not a tty'' is written. The
options are as follows:
-
-
- -s
- Don't write the terminal name; only the exit status is
affected when this option is specified. The -s option is
deprecated in favor of the “
test -t 0
”
command.
tty exits 0 if the standard input is a terminal, 1 if the
standard input is not a terminal, and >1 if an error occurs.
SEE ALSO
test(1),
ttyname(3)
STANDARDS
The
tty utility conforms to
IEEE Std
1003.2-1992 (“POSIX.2”).