I try to login to my ASUS wl500g premium via serial line. the serial connection works, for example this works:

# stty -F /dev/usb/tts/0 9600
# echo test > /dev/usb/tts/0

so i can see "test" on the serial line. however a

# getty -L 9600 -l /bin/login2 -L /dev/usb/tts/0 vt100
prints the login promt to the serial line, i enter root then getty closes:

output of the serial client:
OpenFoensi login: root
  _______                     ________        __
|       |.-----.-----.-----.|  |  |  |.----.|  |_
|   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
|_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
WHITE RUSSIAN (0.9) -------------------------------
  * 2 oz Vodka   Mix the Vodka and Kahlua together
  * 1 oz Kahlua  over ice, then float the cream or
  * 1/2oz cream  milk on the top.
---------------------------------------------------

content of /bin/login2:
#!/bin/ash --login

any hints how to login via serial line?

it looks like "screen /dev/..." should do the trick!

WRONG! ..

root@OpenFoensi:~# dmesg | grep ftdi
ftdi_sio.c: v1.3.5:USB FTDI Serial Converters Driver
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
ftdi_sio.c: write request of 0 bytes
root@OpenFoensi:~# dmesg | grep FTDI
usbserial.c: USB Serial support registered for FTDI SIO
usbserial.c: USB Serial support registered for FTDI 8U232AM Compatible
usbserial.c: USB Serial support registered for FTDI FT232BM Compatible
ftdi_sio.c: v1.3.5:USB FTDI Serial Converters Driver
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
usbserial.c: FTDI 8U232AM Compatible converter now disconnected from ttyUSB0
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs)

does someone use this serial-rs232 converter? a simple echo blahbla > /dev/usb/tts/0 works, however a dmesg > /dev/usb/tts/0 does not really... it display about 10 lines then it just "hangs"... then when i reboot the router he writes about 5 lines more...

when the serial port hangs, this message get logged:
Jan  1 00:26:38 (none) kern.err kernel: ftdi_sio.c: write request of 0 bytes

i guess it is something about flow control.. but i think i set it right, i use this command:

stty -F /dev/usb/tts/0 9600 cs8 cstopb -parity -crtscts

before i started getty

/sbin/getty -n -L /dev/usb/tts/0 9600 vt100 -n -l /bin/sh

any hints?

cheers

(Last edited by michu on 4 Apr 2007, 22:44)

Hi Michu,

Quite long ago, but:
Did you get it working?

I got a "Asus WL-500g Premium" with "KAMIKAZE (7.09)", a "FTDI USB Serial Device converter (FT232BM)" and an old serial VT220 Terminal which i want to use to login without having to boot up any PC and connect via ssh to openwrt..