mjl at luckie.org.nz
Sat Dec 24 10:02:39 UTC 2011
I'd like to be able to login using a null modem cable to a freebsd
server, from a freebsd laptop. It doesn't need to display boot
messages, just allow me to login after the system has booted.
I've got a null modem cable connected to my freebsd server, and on the
other end is a USB serial port on my laptop. On the server I've got:
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
in /etc/ttys on the server:
ttyu0 "/usr/libexec/getty std.9600" vt100 on secure
and there is a getty running on that:
$ ps xa| grep getty
1825 ?? I 0:00.00 /usr/libexec/getty std.9600 ttyu0
On the laptop, I have:
ugen1.2: <FTDI> at usbus1
uftdi0: <USB to Serial Cable> on usbus1
as well as cuaU0 and ttyU0 entries in /dev.
However, when I use cu on the laptop:
sudo cu -l /dev/cuaU0 -s 9600
I never get a login prompt. If I press enter, the cursor scrolls down.
Likewise other characters echo back. I'm reasonably sure that I'm
connected to the appropriate com port on the server because if I plug it
into the other com port and press enter, nothing happens.
It feels to me that I'm missing something basic. Can someone provide me
with some clue?
Note: I'm reasonably sure the null modem cable and USB device are fine,
I've used them recently on an arm board (gateworks) running freebsd and
it worked fine then.
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