On 1/17/20 12:13 AM, enh wrote: >> Yeah i was thinking of saving temp file and then unloading mmap and >> original file (and rest of my allocated blocks) and then rename() and >> for extra cheese maybe file permissions and such need to be copied >> from original file... > > i think vim does the opposite --- it renames the existing file, then > writes to the old file name, then unlinks the renamed original if > everything goes okay.
Which still means there's a moment where a log replay produces a filesystem that hasn't got a usable copy of that file at that name. (Rename is atomic and deletes the target dentry, why would they _not_ do that? They've already got .$FILENAME.sw? files lying around after every unexpected poweroff.) Rob P.S. By the way, any BIOS that wakes the system up from suspend because the power got too low needs a way to shut that off. I'm aware it's signaling windows to save to disk, but I've yet to encounter a Linux that actually notices. It just means "I have 2 more hours of suspend time to plug this in" turns into "my laptop is very hot coming out of my bag, and the battery's dead". _______________________________________________ Toybox mailing list [email protected] http://lists.landley.net/listinfo.cgi/toybox-landley.net
