tty(1) [freebsd man page]

TTY(1)							    BSD General Commands Manual 						    TTY(1)

NAME

     tty -- return user's terminal name

SYNOPSIS

     tty [-s]

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      Do not 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.

EXIT STATUS

     The tty utility 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 is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

HISTORY

     A tty command appeared in Version 1 AT&T UNIX.

BSD
								   June 6, 1993 							       BSD

tty(1)								   User Commands							    tty(1)

NAME

       tty - return user's terminal name

SYNOPSIS

       tty [-l] [-s]

DESCRIPTION

       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.

OPTIONS

       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.

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of  tty: LANG, LC_ALL, LC_CTYPE,   LC_MES-
       SAGES,  and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	Standard input is a terminal.

       1	Standard input is not a terminal.

       >1	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       isatty(3C), ttyname(3C), attributes(5), environ(5), standards(5)

DIAGNOSTICS

       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.

NOTES

       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.

SunOS 5.10							    1 Feb 1995								    tty(1)