stdopen_errno      32 maint/gnulib/lib/xstdopen.c   int stdopen_errno = stdopen ();
stdopen_errno      33 maint/gnulib/lib/xstdopen.c   if (stdopen_errno != 0)
stdopen_errno      34 maint/gnulib/lib/xstdopen.c     error (exit_failure, stdopen_errno, _("standard file descriptors"));