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From: John Baldwin <jhb@FreeBSD.org>
Date: Wed, 26 Jan 2011 20:14:03 +0000 (UTC)
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X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/lib/libc/stdio freopen.c
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jhb         2011-01-26 20:14:03 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    lib/libc/stdio       freopen.c 
  Log:
  SVN rev 217899 on 2011-01-26 20:14:03Z by jhb
  
  MFC 216334:
  When reopening a stream backed by an open file descriptor, do not close
  the existing file descriptor.  Instead, let dup2() atomically close the
  old file descriptor when assigning the newly opened file to the same
  descriptor.  This closes a race in a multithreaded application where a
  concurrent open() could allocate the existing file descriptor in between
  the calls to close() and dup2().
  
  Revision  Changes    Path
  1.21.2.2  +9 -12     src/lib/libc/stdio/freopen.c