akr	2012-06-13 20:37:33 +0900 (Wed, 13 Jun 2012)

  New Revision: 36062

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=36062

  Log:
    update doc.

  Modified files:
    trunk/process.c

Index: process.c
===================================================================
--- process.c	(revision 36061)
+++ process.c	(revision 36062)
@@ -2167,6 +2167,13 @@
  *  This behavior is modified by env and options.
  *  See <code>spawn</code> for details.
  *
+ *  This method modifies process attributes according to _options_
+ *  (details described in <code>spawn</code>)
+ *  before <code>exec(2)</code> system call.
+ *  The modified attributes may be retained when <code>exec(2)</code> system call fails.
+ *  For example, hard resource limits is not restorable.
+ *  If it is not acceptable, consider methods which create a child process such as <code>spawn</code> or <code>system</code>.
+ *
  *  Raises SystemCallError if the command couldn't execute (typically
  *  <code>Errno::ENOENT</code> when it was not found).
  *

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