fix: uid 0 means root on POSIX, but not on Windows

Author: 3cp

lib/item.js

@@ -108,7 +108,7 @@ Item.prototype.canRead = function() {
   const uid = getUid();
   const gid = getGid();
   let can = false;
-  if (uid === 0) {
+  if (process.getuid && uid === 0) {
     can = true;
   } else if (uid === this._uid) {
     can = (permissions.USER_READ & this._mode) === permissions.USER_READ;
@@ -128,7 +128,7 @@ Item.prototype.canWrite = function() {
   const uid = getUid();
   const gid = getGid();
   let can = false;
-  if (uid === 0) {
+  if (process.getuid && uid === 0) {
     can = true;
   } else if (uid === this._uid) {
     can = (permissions.USER_WRITE & this._mode) === permissions.USER_WRITE;
@@ -148,7 +148,7 @@ Item.prototype.canExecute = function() {
   const uid = getUid();
   const gid = getGid();
   let can = false;
-  if (uid === 0) {
+  if (process.getuid && uid === 0) {
     can = true;
   } else if (uid === this._uid) {
     can = (permissions.USER_EXEC & this._mode) === permissions.USER_EXEC;