On Fri, Aug 13, 2010 at 10:51 PM, Allan McRae <allan@archlinux.org> wrote:

Hi,

I have been tracking down a python3 bug and it turns out to be caused by our chroot building. Essentially the permissions of /dev/shm are different in the chroot than on the system:

allan@mugen /home/arch/chroot/stable-i686/copy/dev

...

ls -ld shm drwxr-xr-x 2 root root 40 Jul 12 15:16 shm

allan@mugen /dev

...

ls -ld shm drwxrwxrwt 2 root root 40 Aug 14 10:23 shm

So when configure scripts try to test for POSIX semaphores by writing in that directory, they fail.

Looking at the relevant line in mkarchroot: mount -o bind /dev "${working_dir}/dev"

Doing that manually show the same issue. Should we add

chmod 1777 "${working_dir}/dev/shm"

after the mount? It fixes my issue but feels hackish. Any other suggestions?

Allan

oops I don't have time to try it now, but we could try mounting it without a bind as described here: http://www.linuxfromscratch.org/lfs/view/stable/chapter06/kernfs.html Cheers! Sorry for sending it to arch-general, but I don't have "write" access to arch-dev-public :P