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This patch introduces support for LXC specific public APIs. In common with what was done for QEMU, this creates a libvirt_lxc.so library and libvirt/libvirt-lxc.h header file. The actual APIs are int virDomainLxcOpenNamespace(virDomainPtr domain, int **fdlist, unsigned int flags); int virDomainLxcEnterNamespace(virDomainPtr domain, unsigned int nfdlist, int *fdlist, unsigned int *noldfdlist, int **oldfdlist, unsigned int flags); which provide a way to use the setns() system call to move the calling process into the container's namespace. It is not practical to write in a generically applicable manner. The nearest that we could get to such an API would be an API which allows to pass a command + argv to be executed inside a container. Even if we had such a generic API, this LXC specific API is still useful, because it allows the caller to maintain the current process context, in particular any I/O streams they have open. NB the virDomainLxcEnterNamespace() API is special in that it runs client side, so does not involve the internal driver API. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> |
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