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DELAY(1)		       OneGeek Software			      DELAY(1)

NAME
       delay - counts down a specified number of seconds.

SYNOPSIS
	 delay [options] <length> [-- command]
	 delay [options] until <timespec> [-- command]

DESCRIPTION
       The delay program counts	down a length of time specified	on the command
       line. By	default, it prints out the time	remaining once a second. The
       rate and	style of printing can be controlled using options to the pro-
       gram. This includes the ability to supress the printing entirely. It
       also somewhat supports delaying for fractional seconds.

       Delay attempts to compensate for	the time it spends printing the	up-
       dates. There should be no error that is a multiple of the time spent
       delaying. (There	is a bit of error on the startup and termination of
       the program, but	that's unavoidable.)

       There are several ways that the time to delay can be specified. The
       first is	that it	can be specified as an absolute	length of time to de-
       lay. This can be	in several formats. All	of the following formats are
       allowable. (And equivalent.)

	 delay 1d 2:03:04.5
	 delay 1d 2h 3m	4.5s
	 delay 93785.5

       Please note that	the fractional seconds code will only work for actual
       fractional seconds. So, doing things like '0.5h'	will delay for half a
       second, and not for half	an hour	as one may expect. (But	don't rely on
       this behavior, as it may	change in future versions.)

       The second format is for	a time to delay	until be specified. The	time
       parsing code is derived from that used it at, and as a result the time
       specifications should be	described on at(1). For	example:

	 delay until 4 pm
	 delay until noon tomorrow
	 delay until midnight 13 september 2000
	 delay until now + 5 minutes

       Please note that	the parsing code has a resolution of a minute. So, the
       last specification would	calculate the 5	minutes	from the beginning of
       the current minute, and delay to	that absolute point in time. If	you
       need more precision, you	can use	the first time format, which allows an
       the delay length	to be specified	precisely.

       If delay	sees "--" while	parsing	it's command line, it stops argument
       processing. Instead, the	argument after the "--"	is interpreted as a
       command to be run when delay completes, and any further arguments are
       used as arguments to that command. For example:

	 delay until 9:30 -- cdplay

OPTIONS
       Delay allows you	to use command line options to control aspects of its
       behavior. Here's	a list:

       -q  This	enables	quiet mode. This prevents delay	from outputting	the
	   time	remaining as it	usually	does. (This is the default if delay is
	   called with "sleep" as part of the program name.)

       -m  This	enables	a minimalistic count of	the time remaining, with only
	   the number of seconds left being displayed. This was	the default
	   for delay 1.0.

       -d  This	enables	the default display. The day, hour, minute, and	second
	   are all broken out into seperate entrys. (This is the default, ex-
	   cept	for the	cases where -q is the default.)

       -v  This	enables	a more verbose mode of display.	(It adds some explani-
	   tory	text, as compared to -d.)

       -c  This	allows you to specify a	custom time prompt. Printf-style for-
	   matting is performed, with the following being allowed as the pos-
	   sible percent substitutions:

	     %d	    Days remaining
	     %h	    Hours remaining (modulo 24)
	     %m	    Minutes remaining (modulo 60)
	     %s	    Seconds remaining (modulo 60)
	     %n	    Total seconds remaining

	   For best results, you'll want to make sure that your	custom format
	   stays the same length throughout the	count. Printf-style formatting
	   is done on these codes. Use of percent-codes	other than the ones
	   listed above	will lead to undefined behavior. (Crashes, usually.)

	   The following escapes are also supported:

	     \n	    Newline
	     \r	    Carriage Return
	     \b	    Backspace
	     \\	    Backslash
	     \%	    Percent

	   Since the custom format no longer implicitly	begins with a carriage
	   return, it usually makes sense to either begin a custom code	with
	   \r or end it	with \n.

	   The standard	formats	can be expressed as custom codes. Here's a
	   list	of translations.

	     -m	   \r% 8n
	     -d	   \r% 3d %02h:%02m:%02s
	     -v	   \rTime Remaining: %d	days, %02h:%02m:%02s.

       -C  This	option enables the display of time remaining in	big ugly
	   curses numerals. This only displays the hours, minutes, and seconds
	   remaining, although the number of hours to go may range above 24.

       -u  This	option takes a single parameter, the time in seconds between
	   updates of the time remaining. It need not be a factor of the delay
	   length. It defaults to 1 second, and	must be	at least that value.

       -b  If this option is given, a bell character will be sent when time
	   expires. This may be	useful in cases	where an xterm is send to de-
	   iconify on a	bell.

       -V  If given, delay will	display	it's version and a short copyright
	   message, and	will then exit.

BUGS
       The default format is only good for delays of less than 1000 days.

       Improper	use of the -c option can lead to various problems, and may
       even have some security implications.

       execvp(2) is used to run	the command, and this may run programs in the
       current directory rather	than fully respecting your path. Please	see
       execvp(2) for more details.

AUTHOR
       Tom Rothamel <tom-delay@onegeek.org>

WEB SITE
       The delay web site is located at:

	       http://onegeek.org/~tom/software/delay/

SEE ALSO
       sleep(1), printf(3), at(1)

3rd Berkeley Distribution	  2002-02-09			      DELAY(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | BUGS | AUTHOR | WEB SITE | SEE ALSO

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