Manage locks from shell scripts.
It can be used to ensure that only one process of a command is running.
More information.
- Run a command with a file lock as soon as the lock is not required by others:
flock {path/to/lock.lock} --command "{command}"
- Run a command with a file lock, and exit if the lock doesn't exist:
flock {path/to/lock.lock} --nonblock --command "{command}"
- Run a command with a file lock, and exit with a specific error code if the lock doesn't exist:
flock {path/to/lock.lock} --nonblock --conflict-exit-code {error_code} -c "{command}"
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