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Full Discussion: change
Homework and Emergencies Homework & Coursework Questions change Post 302357331 by ripat on Tuesday 29th of September 2009 11:09:38 AM
Old 09-29-2009
There are two things, the number of tries and the running clock. The -t option of the read internal command takes care of the timout while the shell wait for the user input.

But you have to implement a general timer that will start as soon as the script starts. For that, use the date function converted in number of seconds since EPOCH. That's the idea. Try this:

Code:
#!/bin/bash
time=60
tries=3
start=$(date +%s)

left=$time
while true;do
    read -t $left -p "Code: " code
    ((tries--))
    left=$(($time-$(date +%s)+start))
    if (( $left<=0 || $tries==0 ));then
        echo "BOOOOM"
        break
    fi
    if [[ "$code" == "boom" ]];then
        echo "Correct. Bomb defused"
        break
    else
        echo "Wrong. Try again. There are $left seconds and $tries tries left."
    fi
done
exit

And.. please use the CODE tags for clarity.
Last edited by ripat; 09-29-2009 at 01:14 PM.. Reason: some fixing
 

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LEARN ABOUT DEBIAN

iso8601

PACEMAKER(8)						  System Administration Utilities					      PACEMAKER(8)

NAME

       Pacemaker - Part of the Pacemaker cluster resource manager

SYNOPSIS

       iso8601 command [output modifier]

DESCRIPTION

       iso8601 - Display and parse ISO8601 dates and times

OPTIONS

       -?, --help
	      This text

       -$, --version
	      Version information

       -V, --verbose
	      Increase debug output

   Commands:
       -n, --now
	      Display the current date/time

       -d, --date=value
	      Parse an ISO8601 date/time.  Eg. '2005-01-20 00:30:00 +01:00' or '2005-040'

       -p, --period=value
	      Parse an ISO8601 date/time with interval/period (wth start time).  Eg. '2005-040/2005-043'

       -D, --duration=value
	      Parse an ISO8601 date/time with duration (wth start time). Eg. '2005-040/P1M'

   Output Modifiers:
       -L, --local
	      Show result as a 'local' date/time

       -O, --ordinal
	      Show result as an 'ordinal' date/time

       -W, --week
	      Show result as an 'calendar week' date/time

       For more information on the ISO8601 standard, see: http://en.wikipedia.org/wiki/ISO_8601

AUTHOR

       Written by Andrew Beekhof

REPORTING BUGS

       Report bugs to pacemaker@oss.clusterlabs.org

Pacemaker 1.1.7 						    April 2012							      PACEMAKER(8)
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