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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Determine-if-only-one-instance-is-running/Sidef/determine-if-only-one-instance-is-running.sidef Normal file
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# For this to work, you need to explicitly
# store the returned fh inside a variable.
var fh = File(__FILE__).open_r
# Now call the flock() method on it
fh.flock(File.LOCK_EX | File.LOCK_NB) ->
|| die "I'm already running!"
# Your code here...
say "Running..."
Sys.sleep(20)
say 'Done!'