Created attachment 196476 [details]
svn(1) diff against devel/libserialport
This is not needed and toggles DTR on all connected devices whenever it runs, which isn't necessarily great. Replace it instead with just an access(2) check to make sure the devices are readable by the current user, which is generally what the Linux version of this does. We don't tend to create a bunch of redundant cua* nodes, so this works without exception for drivers like the Linux version.
A commit references this bug:
Date: Wed Feb 13 21:56:10 UTC 2019
New revision: 492865
devel/libserialport: Don't open serial ports when enumerating
Submitted by: kevans