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BASH lock file example
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| #!/usr/bin/env bash | |
| set -e | |
| lockFile="/var/tmp/app.lock" | |
| if ( set -o noclobber; echo "locked" > "$lockFile") 2> /dev/null; then | |
| trap 'rm -f "$lockFile"; exit $?' INT TERM EXIT | |
| else | |
| echo "Can't get file lock, $(basename "$0") already running" >&2 | |
| exit 1 | |
| fi |
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