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.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)ttynam.3f	6.1 (Berkeley) 5/15/85
.\"
.TH TTYNAM 3F "May 15, 1985"
.UC 5
.SH NAME
ttynam, isatty \- find name of a terminal port
.SH SYNOPSIS
.B character*(*) function ttynam (lunit)
.sp 1
.B logical function isatty (lunit)
.SH DESCRIPTION
.I Ttynam
returns a blank padded path name
of the terminal device associated with logical unit
.IR lunit .
.PP
.I Isatty
returns
.B .true.
if
.I lunit
is associated with a terminal device,
.B .false.
otherwise.
.SH FILES
/dev/\(**
.br
.ie \nM /usr/ucb/lib/libU77.a
.el /usr/lib/libU77.a
.SH DIAGNOSTICS
.I Ttynam
returns an empty string (all blanks) if
.I lunit
is not associated with a terminal device in directory `/dev'.

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