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.\"***************************************************************************
.\" Copyright 2020 Thomas E. Dickey *
.\" Copyright 1998-2006,2017 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" "Software"), to deal in the Software without restriction, including *
.\" without limitation the rights to use, copy, modify, merge, publish, *
.\" distribute, distribute with modifications, sublicense, and/or sell *
.\" copies of the Software, and to permit persons to whom the Software is *
.\" furnished to do so, subject to the following conditions: *
.\" *
.\" The above copyright notice and this permission notice shall be included *
.\" in all copies or substantial portions of the Software. *
.\" *
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
.\" *
.\" Except as contained in this notice, the name(s) of the above copyright *
.\" holders shall not be used in advertising or otherwise to promote the *
.\" sale, use or other dealings in this Software without prior written *
.\" authorization. *
.\"***************************************************************************
.\"
.\" $Id: gdc.6,v 1.5 2020/02/02 23:34:34 tom Exp $
.TH GDC 6
.SH NAME
gdc \- grand digital clock (curses)
.SH SYNOPSIS
.B gdc \fP[\fIoptions\fP] [\fIn\fP]
.SH DESCRIPTION
.I Gdc
runs a digital clock made of reverse-video blanks on a terminal screen.
If the terminal supports color, the clock is drawn in red.
You can make the clock stop, pause or resume by pressing a ``q'',
``s'' or space, respectively.
.SH OPTIONS
.TP
.B \-d
use terminal's default colors for the background.
.TP
.B \-n
redirects input to /dev/null, making it ignore the stop/pause commands.
You can still stop it by pressing the interrupt key.
.TP
.B \-s
makes digits scroll as they change.
When running on a fast display, the program breaks up the scrolling into
subsecond repaints, making the operation appear smooth.
.TP
.B \-t \fIhh:mm:ss\fP
specify starting time (default is ``now'').
.PP
With an optional numeric argument
.I num
it stops after
.I num
seconds.
Normally it runs "forever" (counting down from 2 billion seconds).
.SH AUTHOR
Amos Shapir, modified for curses by John Lupien.
.br
Improvements for ncurses by Thomas Dickey.
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