Error handle

README.md

@@ -51,6 +51,10 @@ readlineSync.setPrompt(encoding)
 
 Set the encoding method of input (user's response) and output (`prompt`). Defaults to 'utf8'.
 
+## Note
+The your Node and OS may not support interactively reading from stdin. The stdin interfaces are different by platforms.
+
 ## Release History
+ * 2013-12-18			v0.2.1			Error handle for the environment which don't support interactively reading from stdin.
  * 2013-08-30			v0.2.0			Rewrite exporting methods.
  * 2013-08-29			v0.1.0			Initial release.

lib/readline-sync.js

@@ -22,7 +22,22 @@ var _readlineSync = function(display) {
   if (display) { stdout.write(display, encoding); }
 
   stdin.resume();
-  while ((rsize = fs.readSync(stdin.fd, buffer, 0, BUF_SIZE)) > 0) {
+  while (true) {
+    rsize = 0;
+    try {
+      rsize = fs.readSync(stdin.fd, buffer, 0, BUF_SIZE);
+    } catch (e) {
+      if (e.code === 'EAGAIN') {
+        // Error: EAGAIN, resource temporarily unavailable
+        if (display) { stdout.write('\n', encoding); } // Next of prompt line.
+        console.error('Error: This machine don\'t support interactively reading from stdin.');
+        process.exit(1);
+      } else if (e.code === 'EOF') {
+        break;
+      }
+      throw e;
+    }
+    if (rsize === 0) { break; }
     input += buffer.toString(encoding, 0, rsize);
     if (/[\r\n]$/.test(input)) { break; }
   }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "readline-sync",
   "description": "Synchronous Readline",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "homepage": "https://github.com/anseki/readline-sync",
   "author": {
     "name": "anseki"