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/* Mark FILE as close-on-exec.  Return FILE.  FILE may be NULL, in
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/* Mark FILE as close-on-exec.  Return FILE.  FILE may be NULL, in
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   which case nothing is done.  */
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   which case nothing is done.  */
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static FILE *
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static FILE *
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close_on_exec (FILE *file)
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close_on_exec (FILE *file)
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{
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{
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#if defined (HAVE_FILENO) && defined (F_GETFD)
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  if (file)
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    {
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      int fd = fileno (file);
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      int old = fcntl (fd, F_GETFD, 0);
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      if (old >= 0)
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	fcntl (fd, F_SETFD, old | FD_CLOEXEC);
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    }
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#endif
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  return file;
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  return file;
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}
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}
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FILE *
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FILE *