Revert commits 12c8b27 and 88f416a, fixed properly in 2fe4558.

doc/api/child_processes.markdown

@@ -234,24 +234,7 @@ be sent `'SIGTERM'`. See `signal(7)` for a list of available signals.
     // send SIGHUP to process
     grep.kill('SIGHUP');
 
-Note that while the function is called `kill`, the signal delivered to the
-child process may not actually kill it.  `kill` really just sends a signal
-to a process.
-
-Please note that the example contains a potential race condition on
-(at least) UNIX systems. Here is why:
-
-The canonical approach to starting a child process is to call `fork()` to
-create a copy of the current process, followed by a call to `execve()` to
-replace the copy with the actual child process. This runs in tandem with
-the parent process.
-
-The time between `fork()` and `execve()` is short but it's not zero.
-The child process may not have actually started when `spawn()` returns.
-Thus, if you send a signal immediately after the call to `spawn()`, it may
-end up being delivered to the copy of the current process and *not* the
-actual child process.
-
-The resulting behavior is undefined. It likely won't do what you want it to.
+Note that while the function is called `kill`, the signal delivered to the child
+process may not actually kill it.  `kill` really just sends a signal to a process.
 
 See `kill(2)`

test/simple/test-child-process-kill.js

@@ -29,25 +29,11 @@ var termSignal;
 var gotStdoutEOF = false;
 var gotStderrEOF = false;
 
-var ping = "42\n";
-
 var cat = spawn('cat');
 
-//
-// This test sends a signal to a child process.
-//
-// There is a potential race here where the signal is delivered
-// after the fork() but before execve(). IOW, the signal is sent
-// before the child process has truly been started.
-//
-// So we wait for a sign of life from the child (the ping response)
-// before sending the signal.
-//
-cat.stdin.write(ping);
 
 cat.stdout.addListener('data', function(chunk) {
-  assert.equal(chunk.toString(), ping);
-  cat.kill();
+  assert.ok(false);
 });
 
 cat.stdout.addListener('end', function() {
@@ -67,6 +53,8 @@ cat.addListener('exit', function(code, signal) {
   termSignal = signal;
 });
 
+cat.kill();
+
 process.addListener('exit', function() {
   assert.strictEqual(exitCode, null);
   assert.strictEqual(termSignal, 'SIGTERM');