Tweaks

- Add 'writeable' property
- Renamed pump->flush
- Use sys.mixin instead of process.mixin

lib/fs.js

@@ -1,3 +1,5 @@
+var sys = require('sys');
+
 exports.Stats = process.Stats;
 
 process.Stats.prototype._checkModeProperty = function (property) {
@@ -383,13 +385,13 @@ exports.fileWriteStream = function(path, options) {
 var FileWriteStream = exports.FileWriteStream = function(path, options) {
   this.path = path;
   this.fd = null;
-  this.closed = false;
+  this.writeable = true;
 
   this.flags = 'w';
   this.encoding = 'binary';
   this.mode = 0666;
 
-  process.mixin(this, options || {});
+  sys.mixin(this, options || {});
 
   var
     self = this,
@@ -398,7 +400,7 @@ var FileWriteStream = exports.FileWriteStream = function(path, options) {
 
   queue.push([fs.open, this.path, this.flags, this.mode]);
 
-  function pump() {
+  function flush() {
     if (busy) {
       return;
     }
@@ -416,6 +418,7 @@ var FileWriteStream = exports.FileWriteStream = function(path, options) {
       busy = false;
 
       if (err) {
+        self.writeable = false;
         self.emit('error', err);
         return;
       }
@@ -426,13 +429,13 @@ var FileWriteStream = exports.FileWriteStream = function(path, options) {
         self.emit('open', self.fd);
       }
 
-      // stop pumping after close
+      // stop flushing after close
       if (method === fs.close) {
         self.emit('close');
         return;
       }
 
-      pump();
+      flush();
     });
 
     // Inject the file pointer
@@ -444,21 +447,21 @@ var FileWriteStream = exports.FileWriteStream = function(path, options) {
   };
 
   this.write = function(data) {
-    if (this.closed) {
+    if (!this.writeable) {
-      throw new Error('stream already closed');
+      throw new Error('stream not writeable');
     }
 
     queue.push([fs.write, data, undefined, this.encoding]);
-    pump();
+    flush();
     return false;
   };
 
   this.close = function() {
-    this.closed = true;
+    this.writeable = false;
     queue.push([fs.close,]);
-    pump();
+    flush();
   };
 
-  pump();
+  flush();
 };
 FileWriteStream.prototype.__proto__ = process.EventEmitter.prototype;