Re: [libvirt] [Qemu-devel] [PATCH v4 7/7] osdep: Enable qemu_open to dup pre-opened fd

> Also, I noticed in the fnctl man page that F_SETFL: "On Linux this > command can change only the O_APPEND, O_ASYNC, O_DIRECT, O_NOATIME, and > O_NONBLOCK flags." So I'll only set/unset these flags. O_NDELAY is the obsolete spelling of O_NONBLOCK; which means the only other flags in your list not supported by Linux are O_LARGEFILE (which I said was pointless), O_NOCTTY (which only has an impact at open() and not later on, so it is not worth worrying about), and O_SYNC (so for that one, you should error out if not set correctly, as the difference between O_SYNC on vs. off is significant).