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Shell Programming and Scripting

Executes many times

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# 1  
Old 06-20-2010
Executes many times
The code prints many times, "1st loop" and "2nd loop".
How can I come out the if the condition is matched.
Match should be only once and it should come out of the loop if the match is found

Code:
time=$(date +"%H:%M:%S")

echo $time
while :
do
if [ $(date +"%H:%M:%S") == '10:30:00' ]
then
echo "1st loop"
fi

if [ $(date +"%H:%M:%S") == '10:30:30' ]
then
echo "2nd loop"
fi
echo "Move to first step"
done

# 2  
Old 06-20-2010
Code:
while :
do
  jtime=$(date +"%H:%M:%S")
  if [ "$jtime" = '10:30:00' ]
  then
    echo "1st loop"
    break
  fi

  if [ "$jtime" = '10:30:30' ]
  then
    echo "2nd loop"
    break
  fi
  sleep 30
done

You are creating a new thread for every single progression of your question. Please stop doing this, otherwise you will get various answers in the various threads, and it'll all get rather confusing.
# 3  
Old 06-20-2010
You have to use a break command to stop the loop.
# 4  
Old 06-21-2010
Quote:
Originally Posted by Franklin52
You have to use a break command to stop the loop.
Code:
while :
do
  jtime=$(date +"%H:%M:%S")
  if [ "$jtime" = '10:30:00' ]
  then
    echo "1st loop"
    break
  fi

  if [ "$jtime" = '10:30:30' ]
  then
    echo "2nd loop"
    break
  fi
  sleep 30
done

When the if condition is true, then it should print "1st loop" and go to second if condtion. But the script now is completely stops executing after first if condtion is reached.

output:
1st loop
2nd loop
Again wait till next day 10:30:00
1st loop
2nd loop
and so on
# 5  
Old 06-21-2010
You must define a condition to break out the loop something like:
Code:
if [ .. ]
then
  break
fi

Have a read of this:

Ksh basics
# 6  
Old 06-21-2010
Code:
if [ "$jtime" = '10:30:00' ]
  then
    echo "1st loop"
    break
  fi

  if [ "$jtime" = '10:30:30' ]
  then
    echo "2nd loop"
    break
  fi

If I use break, then

if [ "$jtime" = '10:30:30' ]

is not executed. It completely comes out of the loop.
All the condition should be executed but only once.
output:
1st loop
2nd loop
Again wait till next day 10:30:00
1st loop
2nd loop
and so on
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