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Killing the Wrong Background Process


 
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# 1  
Old 08-29-2009
Killing the Wrong Background Process

BASH on Solaris

Hi All,

I posted a problem whereby I was looking to Kill a background (calling Send)mail) process after a certain time had elapsed.

A User Scottn very kindly provided a useful function to do this as below


CheckAndKill()
{

sleep "$EMAIL_TIMEOUT_THEN_KILL"
[ "$(ps | awk '$1 == '$1)" ] && echo "Killing process $1" && kill -9 "$1"

}

Howvere I am calling this in the wrong way as below:

send_email "Warning Notification" $warning_msg" | tee -a "$LOG_PATH"/email_output.lst &
CheckAndKill $! &

When I check the shell output I can see that I am killing the wrong process ie I am killing the "tee" not the actual send_email function.

The $! passed into CheckAndKill() is clearly picking on the process id of the tee and not the send_email function
Any ideas how to correctly kill the send_email function?

Kind Regards
Satnam
# 2  
Old 08-29-2009
You could modify what you have to use pkill instead of kill so that you can kill a process by name rather than pid and pass it certain attributes (like user id or terminal id) to restrict which process it kills.

----------------------------------------------

If you continue to call it the way you are now, if you extract the PPID when calling ps, you can pkill with process name and PPID.

Last edited by Vi-Curious; 08-29-2009 at 11:15 AM.. Reason: Add PPID info
# 3  
Old 08-29-2009
Is there no way to make use of the existing ode and derive the correct process id before I pass it into ChekandKill()?

Kind regards
S

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