seitan,cooker: add wd to change work directory and mknod

./seitan-cooker demo/mknod.hjson demo/mknod.gluten demo/mknod.bpf

Start seitan with the socket option:
./seitan -s /tmp/seitan.sock -i demo/mknod.gluten

Start the container:
sudo rm -f /dev/lol
sudo chown $USER:$USER /tmp/seitan.sock
podman run -ti --runtime /usr/bin/crun \
        --security-opt label=disable \
        -v $(pwd)/test:/test \
        --annotation run.oci.seccomp_bpf_data="$(base64 -w0 demo/mknod.bpf)" \
        --annotation run.oci.seccomp.receiver=/tmp/seitan.sock fedora \
        sh -c 'mknod /dev/lol c 1 7 && ls -l /dev/lol'

1 files changed, 1 insertions, 1 deletions

diff --git a/seitan.c b/seitan.c
index 4005a9b..a18e3ea 100644
--- a/seitan.c
+++ b/seitan.c
@@ -184,7 +184,7 @@ int main(int argc, char **argv)
 	char req_b[BUFSIZ];
 	struct epoll_event ev, events[EPOLL_EVENTS];
 	struct seccomp_notif *req = (struct seccomp_notif *)req_b;
-	struct arguments arguments;
+	struct arguments arguments = { 0 };
 	char path[PATH_MAX + 1];
 	int fd = -1, epollfd;
 	int pidfd, notifier;