On Tue, Mar 06, 2018 at 10:33:17PM +0000, Andy Lutomirski wrote: > >> Suppose I'm writing a container manager. I want to run "mount" in the > >> container, but I don't want to allow moun() in general and I want to > >> emulate certain mount() actions. I can write a filter that catches > >> mount using seccomp and calls out to the container manager for help. > >> This isn't theoretical -- Tycho wants *exactly* this use case to be > >> supported. > > > > Well, I think this use case should be handled with something like > > LD_PRELOAD and a helper library. FYI, I did something like this: > > https://github.com/stemjail/stemshim > > I doubt that will work for containers. Containers that use user > namespaces and, for example, setuid programs aren't going to honor > LD_PRELOAD.
Or anything that calls syscalls directly, like go programs. Tycho