OPEN_EXISTING 18 ompi/mca/io/romio321/romio/adio/ad_ntfs/ad_ntfs_open.c cmode = OPEN_EXISTING; OPEN_EXISTING 84 opal/mca/event/libevent2022/libevent/sample/event-test.c OPEN_EXISTING, /* existing file only */ OPEN_EXISTING 86 test/event/event-test.c OPEN_EXISTING, // existing file only