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killing a child process

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# 1  
Old 05-02-2007
killing a child process
I am calling another script from my main script and making it run in the background,based upon the value of the input provided by the user I want to kill the child process ,I have written this code

timer.ksh &
PID=$$

print "\n Do you wish to continue .. (Y/N) : \c "
read kill_proc

if [[ $kill_proc = "Y" ]]
then
kill -1 $PID
fi

For some reason the parent script is getting killed ,any ideas why that is happening?

Thanks

Mervin Johnsingh
# 2  
Old 05-02-2007
How
How do you say that the parent is getting killed? If the parent doesnt wait for the child to complete, its going to complete and the child would be taken over by 'init' (pid=1) process. I dont understand by what you mean as parent getting killed.
# 3  
Old 05-02-2007
In the main shell script I am calling this timer script ,so when I type 'Y' in response to the read command then the entire script gets terminated not just the timer script



Just a note ..the timer script is infinite while loop ,so its not going to terminate until terminated externally

while true
do


sleep 1

done


Hope this clarifies it


Thanks

Mervin Johnsingh
Last edited by mervin2006; 05-02-2007 at 06:47 AM..
# 4  
Old 05-02-2007
use $!
Use $! to get the pid of the last background process. $$ gives the pid of the current executing process. So, basically you are killing the process that has started the timer.ksh(the parent process). And so all processes get killed.
# 5  
Old 05-02-2007
thanks
Thanks so much...its working perfectly now..
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