mirror of https://github.com/apache/cloudstack.git
74 lines
1.5 KiB
Bash
74 lines
1.5 KiB
Bash
#!/bin/bash
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# IMPORTANT: Ordering of lock:
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# biglock --> rrouter
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# getLockFile() parameters
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# $1 lock filename
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# $2 timeout seconds
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getLockFile() {
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__locked=0
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__LOCKFILE="/tmp/$1-$$.lock"
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if [ $2 ]
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then
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__TIMEOUT=$2
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else
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__TIMEOUT=30
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fi
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if [ -e $__LOCKFILE ]
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then
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logger -t cloud "Process $0 pid $$ want to get ECLUSIVE LOCK $1 RECURSIVELY!"
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psline=`ps u $$`
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logger -t cloud "Failed job detail: $psline"
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echo 0
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return
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fi
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touch $__LOCKFILE
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for i in `seq 1 $(($__TIMEOUT * 10))`
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do
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currlock=`ls -tr /tmp/$1-*.lock | head -n1`
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if [ $currlock -ef $__LOCKFILE ]
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then
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__locked=1
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break
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fi
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sleep 0.1
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if [ $((i % 10)) -eq 0 ]
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then
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logger -t cloud "Process $0 pid $$ waiting for the lock $1 for another 1 second"
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fi
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done
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if [ $__locked -ne 1 ]
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then
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logger -t cloud "fail to acquire the lock $1 for process $0 pid $$ after $__TIMEOUT seconds time out!"
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psline=`ps u $$`
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logger -t cloud "Failed job detail: $psline"
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fi
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echo $__locked
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}
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# releaseLockFile() parameters
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# $1 lock filename
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# $2 locked(1) or not(0)
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releaseLockFile() {
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__LOCKFILE="/tmp/$1-$$.lock"
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__locked=$2
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if [ "$__locked" == "1" ]
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then
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rm $__LOCKFILE
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fi
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}
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# releaseLockFile() parameters
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# $1 exit value
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# $2 lock filename
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# $3 locked(1) or not(0)
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unlock_exit() {
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releaseLockFile $2 $3
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exit $1
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}
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