akr	2009-06-23 01:25:50 +0900 (Tue, 23 Jun 2009)

  New Revision: 23823

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=23823

  Log:
    update rdoc.

  Modified files:
    trunk/io.c

Index: io.c
===================================================================
--- io.c	(revision 23822)
+++ io.c	(revision 23823)
@@ -1294,11 +1294,13 @@
  *     ios.fsync   => 0 or nil
  *
  *  Immediately writes all buffered data in <em>ios</em> to disk.
- *  Returns <code>nil</code> if the underlying operating system does not
- *  support <em>fsync(2)</em>. Note that <code>fsync</code> differs from
+ *  Note that <code>fsync</code> differs from
  *  using <code>IO#sync=</code>. The latter ensures that data is flushed
  *  from Ruby's buffers, but doesn't not guarantee that the underlying
  *  operating system actually writes it to disk.
+ *
+ *  <code>NotImplementedError</code> is raised
+ *  if the underlying operating system does not support <em>fsync(2)</em>. 
  */
 
 static VALUE
@@ -1325,8 +1327,9 @@
  *     ios.fdatasync   => 0 or nil
  *
  *  Immediately writes all buffered data in <em>ios</em> to disk.
- *  Returns <code>nil</code> if the underlying operating system does not
- *  support <em>fdatasync(2)</em>.
+ *
+ *  <code>NotImplementedError</code> is raised
+ *  if the underlying operating system does not support <em>fdatasync(2)</em>. 
  */
 
 static VALUE

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