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How to break a loop if condition is met

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Top Forums Shell Programming and Scripting How to break a loop if condition is met
# 8  
Old 07-16-2009
Thank you edidataguy
It worked perfectly

thank you edidataguy. you have saved me time.

Appreciate your help very much.

---------- Post updated 07-16-09 at 02:12 AM ---------- Previous update was 07-15-09 at 03:01 AM ----------

I am getting a new error now. I am using the code written by kshji

Code:
[root@localhost tmp]# more /bin/DRI_STATUS.sh
while true
do
   f=$( grep 'END OF STATUS REPORT' filename  2>/dev/null )
   # f include data if grep return some string = find something
   # f is empty string if not find
   # ofcourse you can test exit status: 0=found, != 0  =not
   if [ "$f" != "" ]
   then
           echo Condition match
           break
   fi
   echo condition not met still searching
   sleep 1  # if not so hurry to check under 1 sec, then sleep 1 = system friendly
done

echo Condition met and command to execute
[root@localhost tmp]# DRI_STATUS.sh
/bin/DRI_STATUS.sh: line 17: syntax error: unexpected end of file

It says syntax error but i couldnt find any. Can anyone point me out the error
# 9  
Old 07-17-2009
Hmmmm... interesting.
There is no "Line 17" in your script I think.
Could there be some junk at the end of file? (May be <CR><LF>)
Try giving a "return" right after the last line, like this:

echo "Condition met and command to execute"
return

Or run your script with trace to see which line is giving the error, like:
ksh -x /bin/DRI_STATUS.sh
# 10  
Old 07-19-2009
found the problem
I found the problem.

When I copied the script from the browser to directly to vi editor, some how it was saved in dos format. So even if i use vi to view the script for any control character I couldn't find any because vi was running in dos mode view. But actually there were control character at the end of each return or line.

Normally I am using Putty to ssh and using vi editor. I copied directly from browser to this vi editor while in INSERT Mode. This was the mistake.

Later I copied the script to another system which is a Ubuntu Linux and I found the Control Character when I used vi.

From the below code you can see the last line.

Code:
[omc-r@localhost bin]$ vi DRI_STATUS.sh
while true
do
   f=$( grep 'END OF STATUS REPORT' filename  2>/dev/null )
   # f include data if grep return some string = find something
   # f is empty string if not find
   # ofcourse you can test exit status: 0=found, != 0  =not
   if [ "$f" != "" ]
   then
           echo Condition match
           break
   fi
   echo condition not met still searching
   sleep 1  # if not so hurry to check under 1 sec, then sleep 1 = system friendly
done

echo Condition met and command to execute
~
~
~
~
~
~
"DRI_STATUS.sh" [readonly][dos] 16L, 507C

So anyone who gets this problem be sure to read the last line of vi editor. You might miss the Control character, if in dos view
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