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|
# $Id$
#It is a lock on idJob per user name
LOCKFILE=/tmp/.OARlockfile
MAXBLOCKTIME=120
SLEEPTIME=1
# take the lock
# $1 : job ID for the reservation
# $2 : user login
#return 1 if the lock times out
lock_file () {
SPECIFICLOCKFILE=$LOCKFILE"_"$2
RETURNCODE=0
WAITINGTIME=0
set -C
until ( echo $1 > $SPECIFICLOCKFILE ) 2> /dev/null
do
echo "[LOCK] I am waiting for $WAITINGTIME seconds"
if (( $WAITINGTIME > $MAXBLOCKTIME))
then
echo "[LOCK] It is enough, it may be a bug; I take the lock"
rm -f $SPECIFICLOCKFILE
RETURNCODE=1
else
sleep $SLEEPTIME
fi
((WAITINGTIME= $WAITINGTIME + $SLEEPTIME))
done
set +C
echo "[LOCK] Lock taken"
return $RETURNCODE
}
#release semaphore
# $1 : job ID for the reservation
# $2 : user login
# return 1 if lock file is not right
unlock_file () {
SPECIFICLOCKFILE=$LOCKFILE"_"$2
RETURNCODE=0
LOCKFILEID=`cat $SPECIFICLOCKFILE`
if [ "x$LOCKFILEID" == "x$1" ]
then
echo "[LOCK] I release the lock"
rm -f $SPECIFICLOCKFILE
else
echo "[LOCK] this lock is not mine, execution was too long; maximum is $MAXBLOCKTIME"
RETURNCODE=1
fi
return $RETURNCODE
}
|
