Hello, I've been trying to get libvirt-sandbox working on my Gentoo box but I ran into some difficulties. The version I'm using is the latest git one. The first problem was the following when running virt-sandbox: "Unable to start sandbox: Error opening file '/tmp/libvirt-sandbox-9ivpRN/9pnet.ko': File exists" I pinpointed the problem to the following diff in commit [05fb94d2c42abe9cfd86c3663d704c268f325503]: - gchar *moddirpath = g_strdup_printf("/lib/modules/%s/kernel", + gchar *moddirpath = g_strdup_printf("/lib/modules/%s", The problem is that symlinks are made to the build directory and it finds a module multiple times. I inserted a printf in the lookup loop so here's what I mean: dmns libvirt-sandbox # virt-sandbox -c qemu:///system -n test1323 -v -d /usr/bin/yes found: /lib/modules/3.4.0-gentoo/kernel/fs/fscache/fscache.ko found: /lib/modules/3.4.0-gentoo/source/fs/fscache/fscache.ko found: /lib/modules/3.4.0-gentoo/build/fs/fscache/fscache.ko found: /lib/modules/3.4.0-gentoo/kernel/net/9p/9pnet.ko found: /lib/modules/3.4.0-gentoo/source/net/9p/9pnet.ko found: /lib/modules/3.4.0-gentoo/build/net/9p/9pnet.ko found: /lib/modules/3.4.0-gentoo/kernel/fs/9p/9p.ko found: /lib/modules/3.4.0-gentoo/source/fs/9p/9p.ko found: /lib/modules/3.4.0-gentoo/build/fs/9p/9p.ko found: /lib/modules/3.4.0-gentoo/kernel/net/9p/9pnet_virtio.ko found: /lib/modules/3.4.0-gentoo/source/net/9p/9pnet_virtio.ko found: /lib/modules/3.4.0-gentoo/build/net/9p/9pnet_virtio.ko The next problem was the following: dmns libvirt-sandbox # virt-sandbox -c qemu:///system -n test123 -v -d /usr/bin/yes Unable to start sandbox: Failed to create domain: internal error Process exited while reading console log output: char device redirected to /dev/pts/1 char device redirected to /dev/pts/3 Virtio-9p Failed to initialize fs-driver with id:fsdev-fs1 and export path:libvirt-sandbox/test123/config It appears when running as root because of the following line: ./libvirt-sandbox/libvirt-sandbox-context.c: cachedir = (getuid() ? g_get_user_cache_dir() : RUNDIR); RUNDIR is always "" due to being compiled with -DRUNDIR=\"\" . This is because there's a typo in makefile.am Both of these are fixed in the diff attachment. Having these fixes in place everything works fine when using libvirt 0.9.10 but for newer versions I noticed every time I ran virt-sandbox the libvirtd daemon would segfault. Using git bisect I traced the problem back to commit . So I reverted back to libvirt 0.9.10 but I believe there is a problem both in the commit and somewhere in libvirt-sandbox. Please have a look and tell me if you need extra info.  http://libvirt.org/git/?p=libvirt.git;a=commit;h=4716138229ae47c5492c13a8622b779889560fd7 Radu Caragea.
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