handle_duplicate - duplicate a handle
#include <magenta/syscalls.h> mx_status_t mx_handle_duplicate(mx_handle_t handle, mx_rights_t rights, mx_handle_t* out);
handle_duplicate() creates a duplicate of handle, referring to the same underlying object, with new access rights rights.
To duplicate the handle with the same rights use MX_RIGHT_SAME_RIGHTS. If different rights are desired they must be strictly lesser than of the source handle. It is possible to specify no rights by using 0.
handle_duplicate() returns MX_OK and the duplicate handle via out on success.
MX_ERR_BAD_HANDLE handle isn't a valid handle.
MX_ERR_INVALID_ARGS The rights requested are not a subset of handle rights or out is an invalid pointer.
MX_ERR_ACCESS_DENIED handle does not have MX_RIGHT_DUPLICATE and may not be duplicated.
MX_ERR_NO_MEMORY (Temporary) out of memory situation.