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Title: vfs: fix rename over non-empty directory by christianaurichzm · Pull Request #65613 · nodejs/node · GitHub

Open Graph Title: vfs: fix rename over non-empty directory by christianaurichzm · Pull Request #65613 · nodejs/node

X Title: vfs: fix rename over non-empty directory by christianaurichzm · Pull Request #65613 · nodejs/node

Description: MemoryProvider#renameSync() only rejected a destination whose type differed from the source (EISDIR/ENOTDIR). When both sides were directories it fell through to replacing the destination in its parent, so the destination directory and everything under it disappeared: // node --experimental-vfs const vfs = require('node:vfs').create(); vfs.mkdirSync('/src'); vfs.mkdirSync('/dst'); vfs.writeFileSync('/dst/keep.txt', 'keep'); vfs.renameSync('/src', '/dst'); // no error vfs.existsSync('/dst/keep.txt'); // false rename(2) accepts an existing directory as the destination only when it is empty, and fails with ENOTEMPTY otherwise. RealFSProvider delegates to fs.renameSync() and already behaves that way, so the two providers backing the same node:vfs API disagreed. Two smaller fixes in the same function, both covered by the new tests: a file replaced by a rename now loses a link, so a hard link to it no longer reports an inflated nlink; a rename whose two names resolve to the same entry is a no-op; renaming one hard link onto another used to remove the source name while the file kept its old link count.

Open Graph Description: MemoryProvider#renameSync() only rejected a destination whose type differed from the source (EISDIR/ENOTDIR). When both sides were directories it fell through to replacing the destination in its pa...

X Description: MemoryProvider#renameSync() only rejected a destination whose type differed from the source (EISDIR/ENOTDIR). When both sides were directories it fell through to replacing the destination in its pa...

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