tty

 

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 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 synchro-
            nous 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: LC_CTYPE,
      LC_MESSAGES,  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  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | Availability                | SUNWcsu                     |
     |_____________________________|_____________________________|
     | CSI                         | enabled                     |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      isatty(3C), ttyname(3C), attributes(5), environ(5)
 
 
 
 
 SunOS 5.8            Last change: 1 Feb 1995                    1
 
 
 
 
 
 
 User Commands                                              tty(1)
 
 
 


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 5.8            Last change: 1 Feb 1995                    2
 
 
 

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