akr	2013-02-10 13:14:51 +0900 (Sun, 10 Feb 2013)

  New Revision: 39184

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=39184

  Log:
    add doc. for IO#close_on_exec=.

  Modified files:
    trunk/io.c

Index: io.c
===================================================================
--- io.c	(revision 39183)
+++ io.c	(revision 39184)
@@ -3865,6 +3865,14 @@ rb_io_close_on_exec_p(VALUE io) https://github.com/ruby/ruby/blob/trunk/io.c#L3865
  *     f.close_on_exec = true
  *     system("cat", "/proc/self/fd/#{f.fileno}") # cat: /proc/self/fd/3: No such file or directory
  *     f.closed?                #=> false
+ *
+ *  Ruby sets close-on-exec flags of all file descriptors by default
+ *  since Ruby 2.0.0.
+ *  So you don't need to set by yourself.
+ *  Also, unsetting a close-on-exec flag can cause file descriptor leak
+ *  if another thread use fork() and exec() (via system() method for example).
+ *  If you really needs file descriptor inheritance to child process,
+ *  use spawn()'s argument such as fd=>fd.
  */
 
 static VALUE

--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/