diff --git a/lib/read.bat b/lib/read.bat
index a4d1997..035bfc5 100644
--- a/lib/read.bat
+++ b/lib/read.bat
@@ -1,9 +1,13 @@
 @echo off
 setlocal
+setlocal ENABLEDELAYEDEXPANSION
+
 if "%1"=="noechoback" (
   call :exprog
+  if ERRORLEVEL 1 exit /b 1
 ) else (
   set /p INPUT=<CON >CON
+  if ERRORLEVEL 1 exit /b 1
 )
 set /p ="'%INPUT%'"<NUL
 endlocal
@@ -12,19 +16,27 @@ exit /b 0
 :exprog
 
 :: where /q powershell
-:: Win <Vista and <Server2008 don't have `WHERE`.
+:: Win <Vista and <Server2008 don't have `where`.
 powershell /? >NUL 2>&1
-
 :: Win <7 and <Server2008R2 don't have PowerShell as default.
 :: Win XP and Server2003 have `ScriptPW` (`scriptpw.dll`).
 :: In the systems that don't have both, an error is thrown.
-if errorlevel 1 (
-  set "EXCOMMAND=cscript //nologo "%~dp0read.cs.js""
+if ERRORLEVEL 1 (
+  set "EXECOMMAND=cscript //nologo "%~dp0read.cs.js""
 ) else (
-  set "EXCOMMAND=powershell -Command "$text = read-host -AsSecureString; ^
+  set "EXECOMMAND=powershell -Command "$text = read-host -AsSecureString; ^
     $BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR^($text^); ^
     [System.Runtime.InteropServices.Marshal]::PtrToStringAuto^($BSTR^)""
 )
-:: echo %EXCOMMAND%
-for /f "usebackq delims=" %%i in (`%EXCOMMAND%`) do set "INPUT=%%i"
-exit /b
+
+:: Can't get `ERRORLEVEL` from sub-shell (`for`).
+:: 2 `%ERRCODE%` lines are returned if an error is thrown.
+set ERRCODE=ERR
+set "EXECOMMAND=%EXECOMMAND% ^& if ERRORLEVEL 1 ^(echo %ERRCODE%^& echo %ERRCODE%^)"
+:: echo %EXECOMMAND%
+
+for /f "usebackq delims=" %%i in (`%EXECOMMAND%`) do (
+  if "%%i"=="%ERRCODE%" if "!INPUT!"=="%ERRCODE%" exit /b 1
+  set "INPUT=%%i"
+)
+exit /b 0
diff --git a/lib/read.cs.js b/lib/read.cs.js
index a59f485..2ba757c 100644
--- a/lib/read.cs.js
+++ b/lib/read.cs.js
@@ -1,4 +1,14 @@
+/* global WScript:false */
+
 var oExec;
-WScript.StdOut.Write(WScript.CreateObject('ScriptPW.Password').GetPassword());
+
+// exit-code is not returned even if an error is thrown.
+try {
+  WScript.StdOut.Write(WScript.CreateObject('ScriptPW.Password').GetPassword());
+} catch (e) {
+  WScript.StdErr.Write(e.description);
+  WScript.Quit(1);
+}
+
 oExec = WScript.CreateObject('WScript.Shell').Exec('cmd /c echo; >CON');
 while (oExec.Status === 0) { WScript.Sleep(100); }
diff --git a/lib/read.sh b/lib/read.sh
index bbaa43d..39ddc57 100644
--- a/lib/read.sh
+++ b/lib/read.sh
@@ -1,24 +1,23 @@
-silentRead() {
+silent_read() {
   stty --file=/dev/tty -echo echonl 2>/dev/null || \
     stty -F /dev/tty -echo echonl 2>/dev/null || \
-    stty -f /dev/tty -echo echonl 2>/dev/null || \
-    exit 1
-  IFS= read -r INPUT </dev/tty
+    stty -f /dev/tty -echo echonl || exit 1
+  IFS= read -r INPUT </dev/tty || exit 1
   stty --file=/dev/tty echo -echonl 2>/dev/null || \
     stty -F /dev/tty echo -echonl 2>/dev/null || \
-    stty -f /dev/tty echo -echonl 2>/dev/null
+    stty -f /dev/tty echo -echonl || exit 1
 }
 
 if [ "$1" = "noechoback" ]; then
   # Try `-s` option. *ksh have it that not `--silent`. Therefore, don't try it.
   if [ -n "$BASH_VERSION" ] || [ -n "$ZSH_VERSION" ]; then
-    IFS= read -rs INPUT </dev/tty 2>/dev/null || silentRead
+    IFS= read -rs INPUT </dev/tty 2>/dev/null || silent_read
     printf '\n' >/dev/tty
   else
-    silentRead
+    silent_read
   fi
 else
-  IFS= read -r INPUT </dev/tty 2>/dev/null || exit 1
+  IFS= read -r INPUT </dev/tty || exit 1
 fi
 printf '%s' "'$INPUT'"
 exit 0
diff --git a/lib/readline-sync.js b/lib/readline-sync.js
index 924dfd5..0d13fda 100644
--- a/lib/readline-sync.js
+++ b/lib/readline-sync.js
@@ -11,7 +11,7 @@
 var
   IS_WIN = process.platform === 'win32',
   SHELL_PATH = IS_WIN ? 'cmd.exe' : '/bin/sh',
-  SHELL_COMMAND = __dirname + (IS_WIN ? '\\read.bat' : '/read.sh'),
+  SHELL_CMD = __dirname + (IS_WIN ? '\\read.bat' : '/read.sh'),
 
   ALGORITHM_CIPHER = 'aes-256-cbc',
   ALGORITHM_HASH = 'sha256',
@@ -27,8 +27,7 @@ var
   useShell = false, print, tempdir, salt = 0;
 
 function _readlineSync(display, options) {
-  var input = '', buffer = new Buffer(bufSize),
-    rsize, err;
+  var input = '', res, buffer = new Buffer(bufSize), rsize;
   options = options || {};
 
   if (display !== '') { // null and undefined were excluded.
@@ -38,11 +37,12 @@ function _readlineSync(display, options) {
 
   if (useShell || options.noEchoBack) { // Try reading via shell
 
-    input = _readlineShell(options);
-    if (typeof input !== 'string') {
+    res = _readlineShell(options);
+    if (res.error) {
       if (display !== '') { stdout.write('\n', encoding); } // Return from prompt line.
-      throw new Error('Can\'t read via shell');
+      throw newError(res.props);
     }
+    input = res.stdout;
 
   } else {
 
@@ -53,21 +53,16 @@ function _readlineSync(display, options) {
       try {
         rsize = fs.readSync(stdin.fd, buffer, 0, bufSize);
       } catch (e) {
-        if (e.code === 'EOF') { break; } // pipe
+        if (e.code === 'EOF') { break; }
 
         // Try reading via shell
-        input = _readlineShell(options);
-        if (typeof input === 'string') { break; }
-
-        // Give up...
-        if (e.code === 'EAGAIN') { // EAGAIN, resource temporarily unavailable
-          // util can't inherit Error.
-          err = new Error('The platform doesn\'t support interactive reading from stdin');
-          err.errno = e.errno;
-          err.code = e.code;
+        res = _readlineShell(options);
+        if (res.error) {
+          if (display !== '') { stdout.write('\n', encoding); } // Return from prompt line.
+          throw newError(res.props);
         }
-        if (display !== '') { stdout.write('\n', encoding); } // Return from prompt line.
-        throw err || e;
+        input += res.stdout;
+        break;
       }
 
       if (rsize === 0) { break; }
@@ -81,8 +76,19 @@ function _readlineSync(display, options) {
   return options.noTrim ? input.replace(/[\r\n]+$/, '') : input.trim();
 }
 
+function newError(props) {
+  var err = new Error('The platform doesn\'t support interactive reading from stdin'),
+    key;
+  if (props) {
+    for (key in props) {
+      if (props.hasOwnProperty(key)) { err[key] = props[key]; }
+    }
+  }
+  return err;
+}
+
 function _readlineShell(options) {
-  var shellStdout, args = [],
+  var args = [], res = {},
     execOptions = {
       env: process.env,
       stdio: [stdin], // ScriptPW needs piped stdin
@@ -95,14 +101,21 @@ function _readlineShell(options) {
 
   stdin.pause(); // re-start in child process
   if (childProc.execFileSync) {
-    shellStdout = childProc.execFileSync(SHELL_PATH,
-      [SHELL_COMMAND].concat(args), execOptions);
-    shellStdout = shellStdout.replace(/^'|'$/g, '');
+    try {
+      res.stdout = childProc.execFileSync(SHELL_PATH,
+        (IS_WIN ? ['/C', SHELL_CMD] : [SHELL_CMD]).concat(args), execOptions);
+    } catch (e) { // non-zero exit code
+      res = {error: true, props: {
+        method: 'execFileSync',
+        command: SHELL_CMD, args: args, stderr: e.stderr.trim()
+      }};
+    }
   } else {
-    shellStdout = _execSyncByFile(args, execOptions);
+    res = _execSyncByFile(args, execOptions);
   }
+  if (!res.error) { res.stdout = res.stdout.replace(/^'|'$/g, ''); }
 
-  return shellStdout;
+  return res;
 }
 
 // piping via files (node v0.10-)
@@ -130,8 +143,9 @@ function _execSyncByFile(args, execOptions) {
     return filepath;
   }
 
-  var commandArgs, shellStdout,
+  var cmdArgs, res = {},
     pathStdout = getTempfile('readline-sync.stdout'),
+    pathStderr = getTempfile('readline-sync.stderr'),
     pathStatus = getTempfile('readline-sync.status'),
     pathDone   = getTempfile('readline-sync.done'),
     crypto = require('crypto'), shasum, decipher, password;
@@ -144,36 +158,44 @@ function _execSyncByFile(args, execOptions) {
   if (IS_WIN) {
     // The quote (") is escaped by node before parsed by shell. Then use ENV{Q}.
     process.env.Q = '"';
-    commandArgs = ['/V:ON', '/S', '/C',
-      '%Q%' + SHELL_COMMAND + '%Q% ' + args.join(' ') +
+    // `()` for ignore space by echo
+    cmdArgs = ['/V:ON', '/S', '/C',
+      '(' + SHELL_PATH + ' /V:ON /S /C %Q%%Q%' + SHELL_CMD + '%Q% ' + args.join(' ') +
+        ' & (echo !ERRORLEVEL!)>%Q%' + pathStatus + '%Q%%Q%) 2>%Q%' + pathStderr + '%Q%' +
       ' |%Q%' + process.execPath + '%Q% %Q%' + __dirname + '\\encrypt.js%Q%' +
         ' %Q%' + ALGORITHM_CIPHER + '%Q% %Q%' + password + '%Q%' +
-      ' >%Q%' + pathStdout + '%Q%' +
-      ' & (echo !ERRORLEVEL!)>%Q%' + pathStatus + '%Q% & (echo 1)>%Q%' + pathDone + '%Q%'];
+        ' >%Q%' + pathStdout + '%Q%' +
+      ' & (echo 1)>%Q%' + pathDone + '%Q%'];
   } else {
-    commandArgs = ['-c',
-      'DATA=`(' + SHELL_PATH + ' "' + SHELL_COMMAND + '" ' + args.join(' ') + ')`;' +
-      ' RTN=$?; if [ $RTN -eq 0 ]; then (printf \'%s\' "$DATA"' +
+    cmdArgs = ['-c',
+      '(' + SHELL_PATH + ' "' + SHELL_CMD + '" ' + args.join(' ') +
+        '; echo $?>"' + pathStatus + '") 2>"' + pathStderr + '"' +
       ' |"' + process.execPath + '" "' + __dirname + '/encrypt.js"' +
         ' "' + ALGORITHM_CIPHER + '" "' + password + '"' +
-      ' >"' + pathStdout + '") fi;' +
-      ' expr $RTN + $? >"' + pathStatus + '"; echo 1 >"' + pathDone + '"'];
+        ' >"' + pathStdout + '"' +
+      '; echo 1 >"' + pathDone + '"'];
   }
-  childProc.spawn(SHELL_PATH, commandArgs, execOptions);
+  childProc.spawn(SHELL_PATH, cmdArgs, execOptions);
 
   while (fs.readFileSync(pathDone, {encoding: encoding}).trim() !== '1') {}
   if (fs.readFileSync(pathStatus, {encoding: encoding}).trim() === '0') {
-    shellStdout =
+    res.stdout =
       decipher.update(fs.readFileSync(pathStdout, {encoding: 'binary'}), 'hex', encoding) +
       decipher.final(encoding);
-    shellStdout = shellStdout.replace(/^'|'$/g, '');
+  } else {
+    res = {error: true, props: {
+      method: '_execSyncByFile',
+      command: SHELL_CMD, args: args,
+      stderr: fs.readFileSync(pathStderr, {encoding: encoding}).trim()
+    }};
   }
 
   fs.unlinkSync(pathStdout);
+  fs.unlinkSync(pathStderr);
   fs.unlinkSync(pathStatus);
   fs.unlinkSync(pathDone);
 
-  return shellStdout;
+  return res;
 }
 
 // for dev
diff --git a/package.json b/package.json
index acd261c..c9469bd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "readline-sync",
-  "version": "0.7.3",
+  "version": "0.7.4",
   "title": "readlineSync",
   "description": "Synchronous Readline",
   "keywords": [