dhclient requires the af_packet to be loaded to work. Some distros have it built-in, others like openSUSE have it as a module. Adding the module to the init image, makes sure we have it. Of course no error should be raised if the module can't be found. --- libvirt-sandbox/libvirt-sandbox-builder-machine.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libvirt-sandbox/libvirt-sandbox-builder-machine.c b/libvirt-sandbox/libvirt-sandbox-builder-machine.c index a458882..43372b5 100644 --- a/libvirt-sandbox/libvirt-sandbox-builder-machine.c +++ b/libvirt-sandbox/libvirt-sandbox-builder-machine.c @@ -181,6 +181,8 @@ static gchar *gvir_sandbox_builder_machine_mkinitrd(GVirSandboxConfig *config, #if 0 gvir_sandbox_config_initrd_add_module(initrd, "virtio_balloon.ko"); #endif + /* For dhclient to work */ + gvir_sandbox_config_initrd_add_module(initrd, "af_packet.ko"); if (!gvir_sandbox_builder_initrd_construct(builder, initrd, targetfile, error)) goto cleanup; -- 2.1.4

We surely don't want to mix dhclient and user's command output, make sure dhclient is verbose only if LIBVIRT_SANDBOX_DEBUG is set to 2. --- libvirt-sandbox/libvirt-sandbox-init-common.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/libvirt-sandbox/libvirt-sandbox-init-common.c b/libvirt-sandbox/libvirt-sandbox-init-common.c index d35f760..6008739 100644 --- a/libvirt-sandbox/libvirt-sandbox-init-common.c +++ b/libvirt-sandbox/libvirt-sandbox-init-common.c @@ -159,11 +159,19 @@ start_shell(void) static gboolean start_dhcp(const gchar *devname, GError **error) { - const gchar *argv[] = { "/sbin/dhclient", "-v", "--no-pid", devname, NULL }; + const gchar *argv[5]; + size_t nargs = 0; gboolean ret; sigset_t newset; sigset_t oldset; + argv[nargs++] = "/sbin/dhclient"; + if (debug) + argv[nargs++] = "-v"; + argv[nargs++] = "--no-pid"; + argv[nargs++] = devname; + argv[nargs++] = NULL; + sigemptyset(&newset); sigaddset(&newset, SIGHUP); -- 2.1.4

Some applications and scripts are using /dev/fd. Netconfig and openSUSE network scripts are in such a case, getting the symlink makes them work. --- libvirt-sandbox/libvirt-sandbox-init-qemu.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libvirt-sandbox/libvirt-sandbox-init-qemu.c b/libvirt-sandbox/libvirt-sandbox-init-qemu.c index cd6055a..5ecc3de 100644 --- a/libvirt-sandbox/libvirt-sandbox-init-qemu.c +++ b/libvirt-sandbox/libvirt-sandbox-init-qemu.c @@ -356,6 +356,12 @@ main(int argc ATTR_UNUSED, char **argv ATTR_UNUSED) /* Main special filesystems */ mount_other("/dev", "devtmpfs", 0755); + if (symlink("/proc/self/fd", "/dev/fd") < 0) { + fprintf(stderr, "libvirt-sandbox-init-qemu: %s: failed to create /dev/fd symlink: %s\n", + __func__, strerror(errno)); + exit_poweroff(); + } + mount_other_opts("/dev/pts", "devpts", "gid=5,mode=620,ptmxmode=000", 0755); mount_other("/sys", "sysfs", 0755); mount_other("/proc", "proc", 0755); -- 2.1.4