Re: [libvirt] [PATCH 1/3] utils: Implement virCommandPassFDGetFDIndex

> The problem of having to prevent the reordering of file descriptors > when we are building the QEMU command line with file descriptors > already exists today. So maybe I could just remove this flag and the > related check knowing that reordering of file descriptors and building > the QEMU command line that contains file descriptor (from before the > order) would not be allowed today without any of the patches I am > trying to add. > You surely and safely can. The point behind reordering FDs was that when you're using FD passing as done by systemd, those FDs passed must start from number 3. However, because we are already passing a bunch of file descriptors to QEMU and other commands, we *must not* reorder any file descriptors because it wouldn't work, of course.