Need help with serial port


 
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Old 07-12-2010
Need help with serial port

Hi,

I have a external board connected to my serial port. I need to execute "shutdown -r now" command when system boot up. When system boots up it requires a username ans password. Then I need to run my command. I can use rc script but that is rebooting system before it asks for username and password. The command should
1. first give username to the device
2. secondly, it should give password
3. finally it should give "shutdown -r now" command to the board.

This script can run on the host PC and need to log the botting and rebooting messages.

Is it possible to write script on host PC to do it. I am trying to send command as data over serial but its simply echoes on the board but does execute. Please help. __________________
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TTYSRV(8)						      System Manager's Manual							 TTYSRV(8)

NAME
ttysrv - connect to a serial port and log output SYNOPSIS
ttysrv [-o option] [-s sock] [-l log] -t tty [-b baud] [-p parity] [-w wordsize] [-i pidfile] DESCRIPTION
ttysrv is the backend for rconsole. It connects to the serial port, handles the log file and waits for connections from rconsole to view what's happening on the serial console. OPTIONS
-t tty Specify which device to connect to. -s sock The name of the socket to listen for connections from rconsole on. -o option Specify any ttyios options to open the port with. Currently only nolocal is supported. -l log The logfile to write to. If not set then no log is kept. -b baud Set the baud rate to talk to the port at. Defaults to 9600. -p parity Set the parity for the serial port. Defaults to none. -w wordsize Set the word size for the serial port. Defaults to 8 bits. -i pidfile The file to write the pid of ttysrv to. If not specified no such file is written. SEE ALSO
rconsole(1), remote-tty(1). AUTHOR
rtty was written by Paul Vixie <vixie@isc.org>. This manual page was written by Jonathan McDowell <noodles@earth.li> for the Debian project (but may be used by others). May 23, 2006 TTYSRV(8)