GRDC(6)                      FreeBSD Games Manual                      GRDC(6)

NAME

     grdc - grand digital clock (curses)

SYNOPSIS

     grdc [-st] [n]
     grdc -c n

DESCRIPTION

     grdc runs a digital clock made of reverse-video blanks on a curses
     compatible VDU screen.  With an optional numeric argument n it stops
     after n seconds (default never).  The clock can act as a countdown timer
     with the -c flag, n specifies the number of seconds to time for.  The
     optional -s flag makes digits scroll as they change.  The optional -t
     flag tells grdc to output the time in a 12-hour format.  In this curses
     mode implementation, the scrolling option has trouble keeping up.

ENVIRONMENT

     TZ      The time zone to use for displaying the time.  It is normally
             specified as a pathname relative to /usr/share/zoneinfo, though
             see tzset(3) for more information.  If this variable is not set,
             the time zone is determined based on /etc/localtime.

NOTES

     In countdown timer mode, the specifying of -n > 360000 seconds (100
     hours) will lead to the counter displaying incorrect remaining time,
     however it will time correctly, and display correctly when the remaining
     time becomes less than 100 hours.

AUTHORS

     Amos Shapir, modified for curses by John Lupien.  Countdown timer mode by
     Gavin Atkinson.

FreeBSD 15.1-STABLE-HBSD       January 15, 2023                        GRDC(6)