Fix #3503: stdin: resume() on pipe(dest)

src/node.js

@@ -400,6 +400,14 @@
       // know yet.  Call pause() explicitly to unref() it.
       stdin.pause();
 
+      // when piping stdin to a destination stream,
+      // let the data begin to flow.
+      var pipe = stdin.pipe;
+      stdin.pipe = function(dest) {
+        stdin.resume();
+        return pipe.call(stdin, dest);
+      };
+
       return stdin;
     });
 

test/simple/test-stdin-pipe-resume.js

@@ -0,0 +1,48 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// This tests that piping stdin will cause it to resume() as well.
+var common = require('../common');
+var assert = require('assert');
+
+if (process.argv[2] === 'child') {
+  process.stdin.pipe(process.stdout);
+} else {
+  var spawn = require('child_process').spawn;
+  var buffers = [];
+  var child = spawn(process.execPath, [__filename, 'child']);
+  child.stdout.on('data', function(c) {
+    buffers.push(c);
+  });
+  child.stdout.on('close', function() {
+    var b = Buffer.concat(buffers).toString();
+    assert.equal(b, 'Hello, world\n');
+    console.log('ok');
+  });
+  child.stdin.write('Hel');
+  child.stdin.write('lo,');
+  child.stdin.write(' wo');
+  setTimeout(function() {
+    child.stdin.write('rld\n');
+    child.stdin.end();
+  }, 10);
+}
+