on Win10, fs.stat() returns a stats with undefined blksize and blocks

[3cp]

• Version: 10.15.1, 10.14.1, 11.9.0
• Platform: Windows10 64-bit (didn't test on other windows platform)
• Subsystem: fs

On windows 10, blksize and blocks are undefined. This is a regression from v6 and v8 which are not affected.

As expected, both fs.stat() and fs.statSync() are affected.

This is easy to demo in a powershell.

> node
> var fs = require('fs');
> var s = fs.statSync('any-valid-file');
> s;
Stats{
 dev: 3759094541,
 mode: 33206,
 nlink: 1,
 uid: 0,
 gid: 0,
 rdev: 0,
 blksize: undefined,
 ino: 2814749767419687,
 size: 2526,
 blocks: undefined,
 atimeMs: 1549237516603.1382,
 mtimeMs: 1549237516603.1382,
 ctimeMs: 1549237516603.1382,
 birthtimeMs: 1549237516603.1382,
 atime: 2019-02-03T23:45:16.603Z,
 mtime: 2019-02-03T23:45:16.603Z,
 ctime: 2019-02-03T23:45:16.603Z,
 birthtime: 2019-02-03T23:45:16.603Z }
>

[bnoordhuis]

@joyeecheung I think #20220 is responsible for this? blksize and blocks are passed up (or down, depending on how you look at it) from libuv to node_file.cc to getStatsFromBinding().

(Aside: blksize is fixed at 4096 in libuv but blocks is queried at runtime and meaningful.)

[richardlau]

PR: #26056