From: Yukihiro Matsumoto <matz@...>
Date: 2004-11-02T16:08:05+09:00
Subject: Re: Ruby redirection woes

Hi,

In message "Re: Ruby redirection woes"
    on Tue, 2 Nov 2004 11:14:22 +0900, Steven Kah Hien Wong <steven.wong@nautronix.com.au> writes:

|You actually need to run the test script with a shell redirection. Like
|in the example output I gave, I redirected output of the script to a
|file, output.txt, and then cat'ed it:
|
|    $ ruby command_runner_shell_test.rb > output.txt
|    $ cat output.txt
|    Hello, world! 2 times!
|    Hello, world! 2 times!
|    Hello, world! 2 times!
|
|Hopefully that will reproduce the same results I am seeing? Otherwise if
|this problem just happens on mine... well that is just going to make it
|even more difficult for me to track. :(

Both parent and child processes flushes remaining output buffer.  We
have to flush stdout and stderr before fork(2).  Here's the patch.

							matz.
--- process.c	2 Oct 2004 03:50:48 -0000	1.92.2.11
+++ process.c	2 Nov 2004 07:07:49 -0000
@@ -1259,2 +1259,8 @@ rb_f_fork(obj)
     rb_secure(2);
+
+#ifndef __VMS
+    fflush(stdout);
+    fflush(stderr);
+#endif
+
     switch (pid = fork()) {