addUnixFd
Monitors @fd for the IO events in @events.
The tag returned by this function can be used to remove or modify the monitoring of the fd using method@GLib.Source.remove_unix_fd or method@GLib.Source.modify_unix_fd.
It is not necessary to remove the fd before destroying the source; it will be cleaned up automatically.
This API is only intended to be used by implementations of #GSource. Do not call this API on a #GSource that you did not create.
As the name suggests, this function is not available on Windows.
Return
an opaque tag
Since
2.36
Parameters
fd
the fd to monitor
events
an event mask