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+[[!meta copyright="Copyright © 2010, 2011, 2013 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_glibc]]
+
+`O_CLOEXEC`, `dup3` et al.; see
+<http://udrepper.livejournal.com/20407.html>. [[tschwinge]] once worked
+on this, posted patches to [[mailing_lists/libc-alpha]]. This works needs to
+be resumed
+and finished.
+
+Add tests from Linux kernel commit messages for `t/dup3` et al.
+
+Validate completeness according to <https://wiki.freebsd.org/AtomicCloseOnExec>
+or a similar list.
+
+In <http://lwn.net/Articles/417421/> an interesting point is made: *you [may]
+want some [[unix/file_descriptor]] to still be open if 'exec' fails, but you
+don't want it to be open after the exec succeeds*. [[I|tschwinge]]'m not sure
+whether our current `O_CLOEXEC` implementation adheres to that.