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60 second Timer with Shell Script

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Top Forums Shell Programming and Scripting 60 second Timer with Shell Script
# 8  
Old 10-04-2009
Quote:
Originally Posted by danmero

(Code reformatted for legibility.)
Quote:
Code:
i=60
while [ $i -gt 0 ]
do
 if [ $i -gt 9 ];then
   printf "\b\b$i"
 else
   printf "\b\b $i"
 fi
 sleep 1
 i=`expr $i - 1`
done


That loop will take noticably longer than one second, due partly to the unnecessary external command.
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LEARN ABOUT HPUX

mktimer

mktimer(3C)															       mktimer(3C)

NAME

       mktimer - allocate a per-process timer

SYNOPSIS

DESCRIPTION

       The  function is used to allocate a per-process timer using the specified system-wide clock as the timing base.	returns an unique timer ID
       of type used to identify the timer in timer requests (see gettimer(3C)).  specifies the system-wide clock to be used as the timing base for
       the new timer.  specifies the mechanism by which the process is to be notified when the timer expires.

       supports one per-process timer with a of and of

       If is the system causes a signal to be sent to the process whenever the timer expires.

       For the machine-dependent clock resolution and maximum value are and seconds, respectively.  These constants are defined in

RETURN VALUE

       Upon  successful completion, returns a which can be passed to the per_process timer calls.  If unsuccessful, returns a value of and sets to
       indicate the error.

ERRORS

       fails if any of the following conditions are encountered:

	      [EAGAIN]	  The calling process has already allocated all of the timers it is allowed.

	      [EINVAL]	  is not defined, or does not allow the specified notification mechanism.

FILES

       SEE ALSO
	      timers(2), getclock(3C), gettimer(3C), reltimer(3C), rmtimer(3C), setclock(3C), thread_safety(5).

STANDARDS CONFORMANCE

																       mktimer(3C)