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lslocks

List local system locks.

Reads /proc/locks and resolves file paths by scanning /proc/<pid>/fd/. Size is the file size (not the lock range size), matching util-linux behavior.

Known Limitations

  • Path resolution keys on (pid, inode) rather than (dev, inode) to handle btrfs subvolumes, where st_dev differs from the block device in /proc/locks. This means inodes that happen to collide across filesystems for the same pid could theoretically map to the wrong path (extremely unlikely in practice).
  • The BLOCKER and HOLDERS columns are not populated.
  • Locks held by processes without accessible /proc/<pid>/fd/ will have no path.