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39a676c496
Signed-off-by: Chip Childers <chip.childers@gmail.com> I've assumed that Gavin's commit is appropriate, based on an assumption that we will keep these files in the source tree. If https://issues.apache.org/jira/browse/LEGAL-146 results in a different opionion from the members, then we will end up having to do something more drastic anyway.
93 lines
2.4 KiB
Bash
93 lines
2.4 KiB
Bash
#!/bin/bash
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# Only one lock is allowed: biglock
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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 $$`
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logger -t cloud "Failed job detail: $psline"
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echo 0
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return
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fi
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psline=`ps u $$`
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echo $psline > $__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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cmd=`cat $currlock`
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logger -t cloud "waiting for command: $cmd"
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psline=`ps u $$`
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logger -t cloud "Failed job detail: $psline"
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rm $__LOCKFILE
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fi
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echo $__locked
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}
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# releaseLockFile() parameters
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# $1 lock filename
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# $2 locked(1) or not(0)
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releaseLockFile() {
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__LOCKFILE="/tmp/$1-$$.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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