id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
10367	kqueue on OSX broke support for read-only file descriptors	alexander.afanasyev@…	chris_kohlhoff	"Prior 1.56, we were successfully using `boost::asio::posix::stream_descriptor` with libpcap (file descriptor retrieved via `pcap_get_selectable_fd`).

My understanding, that change https_github.com_boostorg_asio_commit_660e9fe30204e0ada0d1fd40c48015810d2647dc (replace _ with /) required all file-descriptors to be both readable and writeable (e.g., register_descriptor always registers EVFILT_READ and  EVFILT_WRITE events).

In the case of libpcap, the file descriptor only works in one direction (read) and attempt to register EVFILT_WRITE event results in `assign: Invalid argument` error."	Bugs	new	To Be Determined	asio	Boost 1.56.0	Problem