--- /dev/null
+'use strict'
+var path = require('path')
+
+// get drive on windows
+function getRootPath (p) {
+ p = path.normalize(path.resolve(p)).split(path.sep)
+ if (p.length > 0) return p[0]
+ else return null
+}
+
+// http://stackoverflow.com/a/62888/10333 contains more accurate
+// TODO: expand to include the rest
+var INVALID_PATH_CHARS = /[<>:"|?*]/
+
+function invalidWin32Path (p) {
+ var rp = getRootPath(p)
+ p = p.replace(rp, '')
+ return INVALID_PATH_CHARS.test(p)
+}
+
+module.exports = {
+ getRootPath: getRootPath,
+ invalidWin32Path: invalidWin32Path
+}