[arch-dev-public] /dev/shm permissions and building in chroot
Allan McRae
allan at archlinux.org
Fri Aug 13 23:51:30 EDT 2010
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 at mugen /home/arch/chroot/stable-i686/copy/dev
> ls -ld shm
drwxr-xr-x 2 root root 40 Jul 12 15:16 shm
allan at 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
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