fs.link() fails on ReFS with "operation not supported on socket"

[tvald]

• Version: v7.7.1
• Platform: Windows 10 64-bit (14393.693)
• Subsystem: fs

fs.link('src.txt', 'dst.txt') fails when src.txt is on a ReFS partition. The error is:

Error: ENOTSUP: operation not supported on socket, link 'F:\test\src.txt' -> 'F:\test\dst.txt'
    at Object.fs.linkSync (fs.js:1063:18)
    at repl:1:4unction],
    at ContextifyScript.Script.runInThisContext (vm.js:23:33)
    at REPLServer.defaultEval (repl.js:336:29)
    at bound (domain.js:280:14)
    at REPLServer.runBound [as eval] (domain.js:293:12)
    at REPLServer.onLine (repl.js:533:10)
    at emitOne (events.js:101:20)
    at REPLServer.emit (events.js:191:7),
    at REPLServer.Interface._onLine (readline.js:238:10)

I have verified this on two separate Windows 10 systems. On each system, the same call succeeds on an NTFS partition.

I tried various other calls within the fs module (writeFile, readFile, stat, lstat, rename), and they all worked as expected.

[sam-github]

Does ReFS support hard links? Those are an ancient unixism, I wouldn't expect them to work on Windows.

/to @nodejs/platform-windows

[seishun]

Does symlink work for you?

[seishun]

Also:

Some NTFS features are not implemented in ReFS. These include object IDs, 8.3 filename, NTFS compression, Encrypting File System (EFS), transactional NTFS, hard links, extended attributes, and disk quotas. (Wikipedia)

So I guess we can close this.

[tvald]

symlink fails with EPERM on NTFS and ReFS. Any chance the error could be standardized to either EPERM or ENOTSUP, or is it just passing through whatever happens under the hood?

[seishun]

symlink fails with EPERM on NTFS and ReFS.

Because Windows requires Administrator privileges to create symlinks.

[tvald]

d'oh... right >_<

[sam-github]

Isn't ENOTSUP more informative, its "not supported", no amount of permissions is going to make it work.

[seishun]

Yes, ENOTSUP is perfectly suitable in this case.

[tvald]

Correct, I had misinterpreted EPERM on symlink as meaning ENOTSUP. Closing as 🤦.