2005/4/22, Ian F. Darwin <[EMAIL PROTECTED]>:
> Henri Gomez wrote:
>
> >I know that but if your starter wrapper check if the process whom pid
> >is stored on the file is still alive it could determine if the process
> >has been aborted via kill -9.
> >
> >I'm using this kind of hack in Linux init.d rc for at least 2 years,
> >whitout problems
> >
> >
> >
> Right, if you read the PID and send it a signal to ensure it's still
> alive at the OS level, you get quite a bit of reliability.
Here's part of my init.d script :
....
TOMCAT_CFG="/etc/tomcat55/conf/tomcat55.conf"
[ -r "$TOMCAT_CFG" ] && . "${TOMCAT_CFG}"
if [ -x /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
else
# Check if $pid (could be plural) are running
checkpid() {
local i
for i in $* ; do
[ -d "/proc/$i" ] && return 0
done
return 1
}
fi
....
start() {
echo -n "Starting $TOMCAT_PROG: "
if [ -f /var/lock/subsys/tomcat55 ] ; then
read kpid < /var/run/tomcat55.pid
if checkpid $kpid 2>&1; then
echo "process allready running"
return -1
else
echo "lock file found but no process running for pid
$kpid, continuing"
fi
fi
if [ -x /etc/rc.d/init.d/functions ]; then
daemon --user $TOMCAT_USER $TOMCAT_SCRIPT start
else
su - $TOMCAT_USER -c "$TOMCAT_SCRIPT start"
fi
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch /var/lock/subsys/tomcat55
return $RETVAL
}
stop() {
echo -n "Stopping $TOMCAT_PROG: "
if [ -f /var/lock/subsys/tomcat55 ] ; then
if [ -x /etc/rc.d/init.d/functions ]; then
daemon --user $TOMCAT_USER $TOMCAT_SCRIPT stop
else
su - $TOMCAT_USER -c "$TOMCAT_SCRIPT stop"
fi
RETVAL=$?
echo
RETVAL=$?
echo
if [ $RETVAL = 0 ]; then
let count=0;
if [ -f /var/run/tomcat55.pid ] && [ ! -z
/var/run/tomcat55.pid ]; then
read kpid < /var/run/tomcat55.pid
let kwait=$SHUTDOWN_WAIT
until [ `ps --pid $kpid | grep -c $kpid` = '0' ] || [
$count -gt $kwait ]
do
echo "waiting for processes to finish";
sleep 1
let count=$count+1;
done
if [ $count -gt $kwait ]; then
echo "killing processes which didn't stop after
$SHUTDOWN_WAIT seconds"
/bin/kill -9 $kpid
fi
fi
rm -f /var/lock/subsys/tomcat55 /var/run/tomcat55.pid
fi
fi
}
part of my TOMCAT_SCRIPT :
TOMCAT_CFG="/etc/tomcat55/conf/tomcat55.conf"
[ -r "$TOMCAT_CFG" ] && . "${TOMCAT_CFG}"
java ${JAVA_OPTS} ${HEADLESS}
-Djava.endorsed.dirs=/var/tomcat55/common/endorsed
-Dcatalina.base=/var/tomcat55 -Dcatalina.home=/var/tomcat55
-Djava.io.tmpdir=/var/tomcat55/temp -classpath ${CLASSPATH}
org.apache.catalina.startup.Bootstrap $@ >>
/var/log/tomcat55/tomcat55.log 2>&1 &
if [ ! -z "$TOMCAT_PID" ] && [ "$1" != "stop" ] ; then
echo $! > $TOMCAT_PID
fi
As you could see the TOMCAT_SCRIPT grab the tomcat main process id via $!
Bash power :-)
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