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23 lines
725 B
Plaintext
23 lines
725 B
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# flock
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> Manage locks from shell scripts.
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> It can be used to ensure that only one process of a command is running.
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> More information: <https://manned.org/flock>.
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- Run a command with a file lock as soon as the lock is not required by others:
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`flock {{path/to/lock.lock}} --command "{{command}}"`
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- Run a command with a file lock, and exit if the lock doesn't exist:
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`flock {{path/to/lock.lock}} --nonblock --command "{{command}}"`
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- Run a command with a file lock, and exit with a specific error code if the lock doesn't exist:
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`flock {{path/to/lock.lock}} --nonblock --conflict-exit-code {{error_code}} -c "{{command}}"`
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