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darxtrix/singleton_process_linux

Created February 2, 2018 16:13
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#linux
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singleton_process_linux
#!/bin/bash
#globals
export LOCKFILE="/var/tmp/trade_engine.lockfile"
export CMD="python print.py"
#release lock in case of trap signal
trap 'rm -f "$LOCKFILE"; exit $?' INT TERM
#acquire lock
flock -n $LOCKFILE $CMD
if [ $? -eq 0 ]; then
echo "Another process running of "$CMD
else
#clean up
rm -rf $LOCKFILE
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