== non-acl O_TMPFILE creation honors umask
umask 022
fstat after open(0777): 0100755
stat after linkat: 0100755
umask 077
fstat after open(0777): 0100700
stat after linkat: 0100700
== stage from tmpfile
total file size 33669120
00000000  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41 41  |AAAAAAAAAAAAAAAA|
*
00400000  42 42 42 42 42 42 42 42  42 42 42 42 42 42 42 42  |BBBBBBBBBBBBBBBB|
*
00801000  43 43 43 43 43 43 43 43  43 43 43 43 43 43 43 43  |CCCCCCCCCCCCCCCC|
*
00c03000  44 44 44 44 44 44 44 44  44 44 44 44 44 44 44 44  |DDDDDDDDDDDDDDDD|
*
01006000  45 45 45 45 45 45 45 45  45 45 45 45 45 45 45 45  |EEEEEEEEEEEEEEEE|
*
0140a000  46 46 46 46 46 46 46 46  46 46 46 46 46 46 46 46  |FFFFFFFFFFFFFFFF|
*
0180f000  47 47 47 47 47 47 47 47  47 47 47 47 47 47 47 47  |GGGGGGGGGGGGGGGG|
*
01c15000  48 48 48 48 48 48 48 48  48 48 48 48 48 48 48 48  |HHHHHHHHHHHHHHHH|
*
0201c000