TTY(1)                  COMMAND REFERENCE                  TTY(1)



NAME
     tty - get terminal name

SYNOPSIS
     tty [ -s ]

DESCRIPTION
     Tty prints the pathname of the user's terminal (found by
     checking the standard input) unless the -s (silent) option
     is given.

OPTIONS
     -s  Silent. Suppresses output.

EXAMPLES
     The following example shows how tty can be used in a shell
     script to see if the shell script is being run with standard
     input as a terminal:



          #!/bin/sh
          tty -s
          if test $? -eq 1
          then
               echo "Input is not from a terminal."
          else
               echo "Input is from a terminal."
          fi


RETURN VALUE
     [0]            Standard input is a terminal.

     [1]            Standard input is not a terminal.

CAVEATS
     When using tty in a shell script, it is important to note
     that if the standard input is being redirected, as in a pipe
     (|), the terminal name cannot be determined.

SEE ALSO
     test(1sh), ttyname(3c).












Printed 10/17/86                                                1

%%index%%
na:72,59;
sy:131,104;
de:235,250;
op:485,99;
ex:584,443;
rv:1027,185;
ca:1212,248;
se:1460,121;
%%index%%000000000129