DM&P xLinux

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2002/10/07

DM&P xLinux is a reduced Linux package for our user to test and use Linux easily. It is small and fast boot. We can add programs or components our user want.

xLinux Release 2 Environment Overview

Software	Version	Path
Linux Kernel	2.4.17	/boot/linux
Loader	LILO 21.4-4	/
Shell	BusyBox 0.60.2	/bin/busybox
FTP Server	FTP4ALL 2.27	/usr/ftpd
HTTP Server	WN Server 2.2.11	/usr/httpd
DHCP Client	udhcp Client 0.9.6	/usr/dhcpcd
Share Library	glibc 2.2.4	/lib
PPP Daemon/Client	pppd 2.4.1	/sbin
Web Pages		/usr/www
Size Requirement		5 MB

Setup Files

/boot/linux.img	Linux kernel. You can use FTP to upload new kernel to /boot to update kernel.
/etc/init.d/rcS	It will be ran first and you can add your initial programs into it. We add statement assign our IP in this file.
/etc/profile	It work as autoexec.bat under DOS and will be run automatically. We start FTP and HTTP server on /etc/profile.
/etc/inittab	Init is the parent of all processes and it will read inittab. View BusyBox document to get more information.
/usr/www	Our web pages are here. lcd.cgi is a CGI program that can show text from browser to LCD.
/sbin/ftpd	Script to load FTP server.
/sbin/httpd	Script to load HTTP server.
/sbin/dhcpcd	Script to use DHCP to get IP.
/sbin/ppp-on	Script to dial-up with PPP protocol.
/sbin/ppp-off	Script to disconnect PPP connection.
/etc/ppp/pap-secrets	User name and password file for PPP dial-up.

Utilities

Command	Path	Description
ppp-on	/sbin	Start a ppp connection.
ppp-off	/sbin	Stop a ppp connection.
ftpd	/sbin	Start a FTP server.
httpd	/sbin	Start a HTTP server.
dhcpcd	/sbin	Get IP address from DHCP server.
ifconfig	/sbin	Configure a network interface.
fsck.ext2	/sbin	Check and repair a Linux EXT2 file system
lilo	/sbin	Install boot loader.
setserial	/bin	Get/set Linux serial port information.

Commands listed below are implemented by BusyBox: (You can go to http://www.busybox.net/downloads/BusyBox.html to get more information.)

Path	Command
/bin	cat, chgrp, chmod, chown, cp, date, dd, df, dmesg, echo, false, grep, gunzip, gzip, kill, ln, ls, mkdir, mknod, more, mount, msh, mv, pidof, ping, ps, pwd, rm, rmdir, sed, sh, sleep, sync, tar, touch, true, umount, uname, vi, zcat.
/sbin	chat, halt, init, klogd, lsmod, mkswap, modprobe, poweroff, reboot, swapoff, swapon, syslogd.
/usr/bin	[, basename, chvt, clear, cut, deallocvt, dirname, du, env, find, free, head, id, killall, logger, reset, sort, tail, telnet, tty, uniq, uptime, wc, which, whoami, xargs, yes.
/usr/sbin	chroot

Install Your Program

We put FTP server on our Linux DOC/MDM that you can use FTP to upload your program .The user name is "dmp" and password is "dmp".We recommend you to install Linux(RedHat, Mandrake, SuSE...) on a PC to develop your application. Write and compile your program then upload it to Mity-Mite/Tiny module via FTP to test. You can kill the process if program is not correct .Repeat those steps until program is okay. There is a example:

#!/bin/sh./lcd&
sleep 5
./lcd_time&

chmod +x ./lcd
chmod +x ./lcd_time
chmod +x ./demo

# ps
  PID  Uid     Stat Command
    1 0         S    init
    2 0         S    [keventd]
    3 0         S    [ksoftirqd_CPU0]
    4 0         S    [kswapd]
    5 0         S    [bdflush]
    6 0         S    [kupdated]
   11 0         S    -sh
   14 0         S    ./ftpd
   17 0         S    /usr/httpd/wnsd -p 80
   19 0         S    ./lcd
   21 0         S    ./lcd_time
   22 0         R    ps
# kill 21
# kill 22

[root@/root/grlcd]# ldd lcd
        libstdc++-libc6.2-2.so.3 => /usr/lib/libstdc++-libc6.2-2.so.3 (0x4002c000)
        libm.so.6 =

> /lib/libm.so.6 (0x4006e000)
        libc.so.6 =
        >  /lib/libc.so.6 (0x40090000)
        /lib/ld-linux.so.2 =
        >  /lib/ld-linux.so.2 (0x40000000)
[root@/root/grlcd]#