Date: Thu, 3 Oct 2019 09:42:56 +0300 From: Oleksandr Rybalko <ray@ddteam.net> To: "O'Connor, Daniel" <darius@dons.net.au> Cc: freebsd-usb@freebsd.org Subject: Re: USB serial ports by serial number Message-ID: <CAJ1Oi8HeyBvn4UYSDAh8gGxj0hPv-vgFZ9ArNX95CTniuQa80g@mail.gmail.com> In-Reply-To: <CC980A9B-8F41-4C2A-A729-2CC690DFDA7E@dons.net.au> References: <CC980A9B-8F41-4C2A-A729-2CC690DFDA7E@dons.net.au>
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Hi,
Looks like you are lucky guy :)
Most of USB-serial devices have "very stable" serial number :)
more than 50% have S/N "0123456789".
So, sometime you change will do it's job.
IMO, better to track hub/port.
Thanks.
=D1=87=D1=82, 3 =D0=B6=D0=BE=D0=B2=D1=82. 2019 =D0=BE 05:56 O'Connor, Danie=
l <darius@dons.net.au> =D0=BF=D0=B8=D1=88=D0=B5:
> Hi,
> I have several USB serial ports on a machine and I don't want to rely on
> attach order to get various programs to talk to the correct serial port.
>
> I wrote the following devd script and shell script to create symlinks fro=
m
> cu.${sernum}/tty.${sernum} to the real device nodes.
>
> I post it here in the hope other people find it useful.
>
> [maarsytest 2:49] ~> cat /usr/local/etc/devd/usbserialsn.conf
> attach 100 {
> device-name ".*";
> match "ttyname" ".+";
> match "ugen" ".+";
> match "sernum" ".+";
> action "/usr/local/libexec/usbserialsn attach $device-name $sernu=
m
> $ttyname";
> };
>
> detach 100 {
> device-name ".*";
> action "/usr/local/libexec/usbserialsn detach $device-name";
> };
> [maarsytest 2:49] ~> cat /usr/local/libexec/usbserialsn
> #!/bin/sh
>
> if [ $# -lt 2 ]; then
> echo "Bad usage"
> exit 1
> fi
>
> mode=3D$1
> devname=3D$2
> sernum=3D$3
> ttyname=3D$4
>
> case "$mode" in
> attach)
> if [ $# -ne 4 ]; then
> echo "Bad usage"
> exit 1
> fi
> ln -sf cua${ttyname} /dev/cu.${sernum}
> ln -sf tty${ttyname} /dev/tty.${sernum}
> echo ${sernum} >/var/run/usbserialsn.${devname}
> ;;
>
> detach)
> if [ $# -ne 2 ]; then
> echo "Bad usage"
> exit 1
> fi
> if [ ! -e /var/run/usbserialsn.${devname} ]; then
> exit 0
> fi
> sernum=3D$(cat /var/run/usbserialsn.${devname})
> rm -f /dev/cu.${sernum} /dev/tty.${sernum}
> /var/run/usbserialsn.${devname}
> ;;
>
> *)
> echo "Unknown mode"
> exit 1
> ;;
> esac
>
> It would be a lot simpler if devd reported the same things on detach as i=
t
> does on attach but I am not sure how difficult that would be to achieve
> (presumably it would require caching them).
>
> --
> Daniel O'Connor
> "The nice thing about standards is that there
> are so many of them to choose from."
> -- Andrew Tanenbaum
>
>
> _______________________________________________
> freebsd-usb@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-usb
> To unsubscribe, send any mail to "freebsd-usb-unsubscribe@freebsd.org"
>
--=20
WBW
-------
Rybalko Aleksandr <ray@ddteam.net>
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