sunos man page for tty

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)