Date: Sat, 26 Jan 2013 15:45:54 -0600 From: dweimer <dweimer@dweimer.net> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Locking USB Serial Device to Specific Com port Message-ID: <762f51b7c30dd5c920788336b3eb4fa5@dweimer.net>
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I have two USB Serial adapters I use on my web server, ones always
connected, to allow NUT to monitor my UPS. The other I use to view the
console of my pfSense firewall, however I sometimes disconnect this one
to use it with my laptop to configure switches.
Because this one is unplugged and plugged back in, sometimes on reboot
it ends up switching its com port with the UPS, so NUT fails to start
and the UPS is unmonitored.
I would like to lock down the USB serial port adapter used on the UPS
to /dev/cuaU0, to make sure the UPS is always monitored and I will get a
clean shutdown in event of a power failure.
I believe that this requires setting a hint line of some sort in the
/boot/loader.conf file, but I am having trouble tracking down what this
should be, or maybe I am on the wrong track. Here is the current
information from the adpapters, the UPS adapter was connected at boot,
is on /dev/cuaU0, the other one was plugged in after boot, and is on
/dev/cuaU1.
dmesg output:
ugen0.2: <Prolific Technology Inc.> at usbus0
uplcom0: <Prolific Technology Inc. USB-Serial Controller, class 0/0,
rev 1.10/3.00, addr 2> on usbus0
ugen0.3: <Prolific Technology Inc.> at usbus0
uplcom1: <Prolific Technology Inc. USB-Serial Controller, class 0/0,
rev 1.10/3.00, addr 3> on usbus0
sysctl -a | grep uplmon:
device uplcom
hw.usb.uplcom.debug: 0
dev.uplcom.0.%desc: Prolific Technology Inc. USB-Serial Controller,
class 0/0, rev 1.10/3.00, addr 2
dev.uplcom.0.%driver: uplcom
dev.uplcom.0.%location: bus=1 hubaddr=3 port=0 devaddr=2 interface=0
dev.uplcom.0.%pnpinfo: vendor=0x067b product=0x2303 devclass=0x00
devsubclass=0x00 sernum="" release=0x0300 mode=host intclass=0xff
intsubclass=0x00 intprotocol=0x00 ttyname=U0 ttyports=1
dev.uplcom.0.%parent: uhub0
dev.uplcom.0.ttyname: U0
dev.uplcom.0.ttyports: 1
dev.uplcom.1.%desc: Prolific Technology Inc. USB-Serial Controller,
class 0/0, rev 1.10/3.00, addr 3
dev.uplcom.1.%driver: uplcom
dev.uplcom.1.%location: bus=1 hubaddr=1 port=0 devaddr=3 interface=0
dev.uplcom.1.%pnpinfo: vendor=0x067b product=0x2303 devclass=0x00
devsubclass=0x00 sernum="" release=0x0300 mode=host intclass=0xff
intsubclass=0x00 intprotocol=0x00 ttyname=U1 ttyports=1
dev.uplcom.1.%parent: uhub0
dev.uplcom.1.ttyname: U1
dev.uplcom.1.ttyports: 1
Does anyone have any suggestions on how to do this?
--
Thanks,
Dean E. Weimer
http://www.dweimer.net/
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