Messages in this thread | | | Subject | Re: adding plan9-like usernames to the kernel | From | Casey Schaufler <> | Date | Wed, 7 Feb 2018 09:57:20 -0800 |
| |
On 2/7/2018 4:38 AM, Enrico Weigelt, metux IT consult wrote: > Hi folks, > > > as part as a little research project for bringing Plan9 semantics > to Linux, I'd like to add textual usernames. In contrast to *nix, > Plan9 doesn't use numerical IDs, but names. > > Obviously that needs some internal mapping between names and ids. > > Should this go into struct user_namespace (where per-namespace > uid mapping lives) or to struct cred / struct user_struct ?
Why not keep a mapping associated with your devices?
> > The primary consumer of this username will be the /dev/caphash > and /dev/capuse devices for switching the UID. > (an interesting question of course is, how to allocate the > numerical UIDs for given usernames)
You read it from /etc/passwd (or the equivalent service) and write it to your device based list via an ioctl, or a companion device (/dev/capset?). If no one outside your devices is using it this would be the logical place for the data to reside.
> > > --mtx >
| |