tc-terminal-server

tc-terminal-server.sh

#!/bin/busybox ash
# Woven together by Curaga (2008)
# Changes made remove user interaction and allow serial console and TFTP package loading by Matthew Fearnley (2018)
. /etc/init.d/tc-functions
useBusybox

set -x
set -u

ROOTFS=core

# Set the variables
   IFACE=eth0 # `ifconfig | sed -n '1 s/ .*//p'`
    MYIP=192.168.0.1
 STARTIP=192.168.0.30
   ENDIP=192.168.0.60
  ROUTER=$MYIP
  SUBNET=255.255.255.0
     DNS=1.1.1.1

  SERIAL="" # 9600
CPSHADOW=1
TFTPLIST=tftpboot.lst
  TCEDIR=/tmp/tce # /mnt/sda1/tce/

fail(){
	[ -d /netboot ] && rm -rf /netboot
	echo "$1"
	exit 1
}

servers(){
	echo Please leave this terminal open
	udhcpd /netboot/udhcpd.conf &
	udpsvd -E 0 69 tftpd /netboot/
}

checkroot

ifconfig $IFACE $MYIP netmask $SUBNET

KERNELOPTIONS='blacklist=pcspkr kmap=qwerty/uk'

#Boot device
BOOTFROM=

# Check for the host's IP here
MYIP=`ifconfig $IFACE | grep inet | cut -d":" -f2 | cut -d" " -f1`
[ -n "$MYIP" ] || fail "$IFACE doesn't have an IP set"


# Checks & copying to ram
case `cat /proc/mounts` in
	*$BOOTFROM* )
		true ;;
	* )
		mount $BOOTFROM || fail "Failed to mount $BOOTFROM" ;;
esac

PREPATH="$(find /mnt/${BOOTFROM##*/} -name "$ROOTFS".gz)"
AFTERMATH="${PREPATH%/"$ROOTFS".gz}"

[ -n "$PREPATH" ] || fail "Can't find kernel! Aborting!"

# Cleanup / create folders
rm -rf /netboot
mkdir -p /netboot/pxelinux.cfg/

# Copy kernel, initrd, pxelinux.0 to /netboot/
cp $AFTERMATH/vmlinuz  $AFTERMATH/"$ROOTFS".gz  /usr/share/syslinux/pxelinux.0  /netboot/


# Should we rebuild the rootfs?
if [ -n ${SERIAL:+x} ] || [ -n ${CPSHADOW:+x} ] ; then

	# Extract rootfs
	rm -rf /tmp/"$ROOTFS"
	mkdir -p /tmp/"$ROOTFS"
	cd /tmp/"$ROOTFS"
	gzip -dc /netboot/"$ROOTFS".gz | cpio -H newc -i

	if [ -n ${CPSHADOW:+x} ]; then
		# Copy /etc/shadow, containing user passwords
		cp /etc/shadow ./etc/
	fi

	if [ -n ${SERIAL:+x}   ]; then
		# Add kernel options to echo to serial, and update inittab to open a serial terminal
		KERNELOPTIONS="$KERNELOPTIONS text console=ttyS0,$SERIAL"
		echo "ttyS0::respawn:/sbin/getty $SERIAL ttyS0" >> ./etc/inittab
	fi

	# Rebuild rootfs
	find | cpio -H newc -o | gzip -9 > /netboot/"$ROOTFS.gz"

fi


# Function to build package list with dependencies (for TFTPLIST)
addpackage(){
	if ! grep "^$1$" /netboot/$TFTPLIST; then
		for i in $(cat "$TCEDIR"/optional/$1.dep); do
			addpackage $i
		done
		echo $1 >> /netboot/$TFTPLIST
		cp "$TCEDIR"/optional/$1 /netboot/
	fi
}

#if TFTPLIST set, compile list of packages from onboot.lst, update kernel options
if [ -n ${TFTPLIST+x} ]; then
	for i in $(cat "$TCEDIR"/onboot.lst); do
		addpackage $i
	done
	KERNELOPTIONS="$KERNELOPTIONS TFTPLIST=$MYIP:/$TFTPLIST"
fi


## Write udhcpd.conf:
echo "# The start and end of the IP lease block

start 		$STARTIP
end		$ENDIP

# The interface that udhcpd will use

interface	$IFACE

boot_file /pxelinux.0
opt	dns	$DNS
option	subnet	$SUBNET
opt	router	$ROUTER
option	lease	864000		# 10 days of seconds
option	tftp	$MYIP
siaddr	$MYIP
" > /netboot/udhcpd.conf


## Write pxelinux.conf
echo "DEFAULT $ROOTFS
${SERIAL+SERIAL 0 $SERIAL}
TIMEOUT 300

LABEL $ROOTFS
KERNEL vmlinuz
APPEND $KERNELOPTIONS initrd=$ROOTFS.gz
" > /netboot/pxelinux.cfg/default


# A workaround for buggy busybox udhcpd - make link of pxelinux.0 with 0xff appended to filename

ln -s /netboot/pxelinux.0 $'/netboot/pxelinux.0\xff'

# If everything's OK, let's roll!
servers