Duplicate a handle.
#include <zircon/syscalls.h> zx_status_t zx_handle_duplicate(zx_handle_t handle, zx_rights_t rights, zx_handle_t* out);
zx_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 ZX_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 ZX_RIGHT_NONE. To remove ZX_RIGHT_DUPLICATE right when
transferring through a channel, use
handle must have ZX_RIGHT_DUPLICATE.
zx_handle_duplicate() returns ZX_OK and the duplicate handle via out on success.
ZX_ERR_BAD_HANDLE handle isn't a valid handle.
ZX_ERR_INVALID_ARGS The rights requested are not a subset of handle rights or out is an invalid pointer.
ZX_ERR_ACCESS_DENIED handle does not have ZX_RIGHT_DUPLICATE and may not be duplicated.
ZX_ERR_NO_MEMORY Failure due to lack of memory. There is no good way for userspace to handle this (unlikely) error. In a future build this error will no longer occur.
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