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Top Forums Shell Programming and Scripting Exit for loop in a shell script if a condition is successfull Post 302315688 by usha rao on Wednesday 13th of May 2009 03:59:59 AM
Old 05-13-2009
Hi Kerrylinux,
Thanks a lot for your reply and sorry for delay in reply.

but while executing the script it is giving like this:

Code:
./operating_check.ksh[68]: tmp/thread_causing_problem: cannot create


The code snippet which you have given i have to use it in a loop like i have specified earlier like this:


Code:
for jvm in `cat /tmp/highcpu | awk -F" " '{print $3}' | sed 's/Cl/\/Cl/g'`;do

for val in `cat /tmp/thrd_id`;do

cd /logs/$jvm
echo "Thread location is $jvm and thread id is $val" >> /tmp/thread_causing_problem
OUTPUT=$(cat websphere_stdout.txt |sed -n "/$val/,/\"/p")
if [[ x${OUTPUT} != "x" ]];then
         echo $OUTPUT >> tmp/thread_causing_problem
else
         exit 7
fi
done
done


and what is the significance of exit 7???

as specified by Tony whether i have to use use exit or break??

Please advice...
Thanks
 

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UNBUFFER(1)						      General Commands Manual						       UNBUFFER(1)

NAME
unbuffer - unbuffer output SYNOPSIS
unbuffer program [ args ] INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose you are watching the output from a fifo by running it through od and then more. od -c /tmp/fifo | more You will not see anything until a full page of output has been produced. You can disable this automatic buffering as follows: unbuffer od -c /tmp/fifo | more Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the -p flag. Example: process1 | unbuffer -p process2 | process3 CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider: process1 | unbuffer -p process2 | process3 If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or process2. In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro- cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place- holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder for another process. $ cat /tmp/abcdef.log | grep abc | cat abcdef xxxabc defxxx $ cat /tmp/abcdef.log | unbuffer grep abc | cat $ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat abcdef xxxabc defxxx $ BUGS
The man page is longer than the program. SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995. AUTHOR
Don Libes, National Institute of Standards and Technology 1 June 1994 UNBUFFER(1)
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