Command-line tool

flock

brew/flock

Checked 25 Oct 2026, 21:09 UTC · Listing refreshed from Homebrew, winget, npm, Scoop and cargo; npm packages checked against OSV.dev

Lock file during command

Website Source

At a glance

Type

Command-line tool

Install on

Windows, macOS, Linux

Last checked

25 Oct 2026, 21:09 UTC

Install it

Windows

winget install --id FlockFZ.Flock -e

macOS

brew install flock

Linux

brew install flock

Run a command with a file lock as soon as the lock is available

flock path/to/lock.lock command

Run a command with a file lock, or exit if the lock is currently being held (with exit code 1)

flock -n path/to/lock.lock command

Run a command with a file lock, or exit with a specific error code if the lock is currently being held

flock -n -E 123 path/to/lock.lock command

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