tty(1) manual page
Table of Contents
tty - return user’s terminal name
tty [ -l ] [ -s ]
SUNWcsu
The tty utility writes to the standard output the name of
the terminal that is open as standard input. The name that is used is equivalent
to the string that would be returned by the ttyname(3C)
function.
The
following options are supported:
- -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 status.
See environ(5)
for descriptions of the
following environment variables that affect the execution of tty: LC_CTYPE
,
LC_MESSAGES
, and NLSPATH
.
The following exit values are returned:
- Standard input is a terminal.
- Standard input is not a terminal.
- >1
- An error
occurred.
isatty(3C)
, ttyname(3C)
, environ(5)
- not on
an active synchronous line
- The standard input is not a synchronous terminal
and -l is specified.
- not a tty
- The standard input is not a terminal and -s
is not specified.
The -s option is useful only if the exit status is
wanted. It does not rely on the ability to form a valid path name. Portable
applications should use test -t.
Table of Contents