code refactor & sync bugfixes

src/symlinks.js

@@ -25,15 +25,7 @@
 const fsp = require('fs').promises
 const fs = require('fs')
 const path = require('path')
-
-function exists(p) {
-  try {
-    fs.accessSync(p)
-    return true
-  } catch {
-    return false
-  }
-}
+const { pathExists: exists } = require('./fsutil')
 
 // dosdevices/ holds the prefix's drive mappings (c:, z:, d:, com1 ...). They
 // are *supposed* to point outside the prefix - at the filesystem root, a