zero_fd          1588 maint/gnulib/lib/stackvma.c #   define zero_fd -1
zero_fd          1698 maint/gnulib/lib/stackvma.c #   define zero_fd -1
zero_fd           901 maint/gnulib/lib/vma-iter.c #  define zero_fd -1
zero_fd          1026 maint/gnulib/lib/vma-iter.c #   define zero_fd -1
zero_fd          1144 maint/gnulib/lib/vma-iter.c #   define zero_fd -1
zero_fd            77 maint/gnulib/tests/mmap-anon-util.h #  define zero_fd -1