On 2012-12-27, Volker Armin Hemmann wrote: > Am Sonntag, 23. Dezember 2012, 19:44:43 schrieb Nuno J. Silva: >> On 2012-12-23, Alan Mackenzie wrote: >> > On Sun, Dec 23, 2012 at 07:03:25PM +0200, Nuno J. Silva wrote: >> >> On 2012-12-23, Alan McKinnon wrote: >> >> > On Sun, 23 Dec 2012 12:22:24 +0200 >> >> > >> >> > nunojsi...@ist.utl.pt (Nuno J. Silva) wrote: >> >> >> On 2012-12-18, Alan McKinnon wrote: >> >> >> > On Tue, 18 Dec 2012 09:08:53 -0500 >> >> >> > Michael Mol <mike...@gmail.com> wrote: >> >> >> > >> >> >> > This sentence summarizes my understanding of your post nicely: >> >> >> >> Now, why is /usr special? It's because it contains executable code >> >> >> >> the system might require while launching. >> >> >> > >> >> >> > Now there are only two approaches that could solve that problem: >> >> >> > >> >> >> > 1. Avoid it entirely >> >> >> > 2. Deal with it using any of a variety of bootstrap techniques >> >> >> > >> >> >> > #1 is handled by policy, whereby any code the system might require >> >> >> > while launching is not in /usr. >> >> >> > >> >> >> > #2 already has a solution, it's called an init*. Other solutions >> >> >> > exist but none are as elegant as a throwaway temporary filesystem >> >> >> > in RAM. >> >> >> >> >> >> What about just mounting /usr as soon as the system boots? >> >> > >> >> > Please read the thread next time. The topic under discussion is >> >> > solutions to the problem of not being able to do exactly that. >> >> >> >> Then I suppose you can surely explain in a nutshell why can't init >> >> scripts simply do that? >> > >> > Because certain people with influence have rearranged the filesystem so >> > that programs within /usr are absolutely necessary for booting; they are >> > needed _before_ init has a chance to mount /usr. So either /usr has to >> > be in the root partition, or crazy kludges need to be used to mount /usr >> > before the kernel runs init. >> >> I surely don't know the udev architecture well enough, but if this is >> all done by the udev daemon, can't we just "mount /usr" before the >> daemon is started? The only needed things should be mount (which is >> under /bin here) and /etc/fstab. >> > > and a device node in /dev - like /dev/sda2. And how do you get that one > without udev? > > oops?
Please try booting your system and getting to a shell before udevd gets started. Then, please do ls /dev. -- Nuno Silva (aka njsg) http://njsg.sdf-eu.org/
