#!/bin/bash

#©keithhedger Mon 2 Feb 12:38:29 GMT 2015 kdhedger68713@gmail.com

readWithDefault ()
{
	local varname="$1"
	local varcontents="${!varname}"
	local message="$2"

	read -e -p "$message [ ${varcontents} ] "
	if [ "X$REPLY" != "X" ];then
		eval "${varname}=$REPLY"
	fi
}

if [ $UID -ne 0 ];then
	echo "You MUST run this script as root ..."
	exit 100
fi
	 
if [ -e ./SystemData ];then
	. ./SystemData
else
	echo "No SystemData file found ..."
	exit 100
fi

if [[ -z $LFS ]];then
	echo 'LFS NOT SET!!! Exiting ...'
	exit 100
else
	readWithDefault "LFS" "LFS set to \"$LFS\""
	if ! mountpoint $LFS;then
		echo "LFS NOT Mounted, exiting ..."
		exit 100
	fi
fi

pushd $LFS
	mkdir -v {dev,proc,sys}||true
	mknod -m 600 dev/console c 5 1
	mknod -m 666 dev/null c 1 3

	mkdir -pv {bin,boot,etc/{sysconfig,profile.d},home,mnt,opt,run}
	mkdir -pv {media/{floppy,cdrom},sbin,srv,var}
	install -dv -m 0750 root
	install -dv -m 777 tmp var/tmp
	mkdir -pv usr/{,local/}{bin,include,lib${LIBDIRSUFFIX},sbin,src}
	mkdir -pv usr/{,local/}share/{color,dict,doc,info,locale,man}
	mkdir -v  usr/{,local/}share/{misc,terminfo,zoneinfo}
	mkdir -pv  usr/libexec
	mkdir -pv usr/{,local/}share/man/man{1..8}
	for dir in usr usr/local
		do
			ln -sfnv share/{man,doc,info} $dir
		done

	case $(uname -m) in
		x86_64)
			ln -sfnv lib${LIBDIRSUFFIX} usr/local/lib
			;;
	esac

	mkdir -vp run/shm
	mkdir -v var/{log,mail,spool}
	ln -sfnv /run var/run
	ln -sfnv /run/lock var/lock
	mkdir -pv var/{opt,cache,lib/{color,misc,locate},local}

	ln -sfnv /proc/self/mounts etc/mtab

	cat > etc/passwd << "EOF"
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/dev/null:/bin/false
daemon:x:6:6:Daemon User:/dev/null:/bin/false
messagebus:x:18:18:D-Bus Message Daemon User:/var/run/dbus:/bin/false
nobody:x:99:99:Unprivileged User:/dev/null:/bin/false
EOF

	cat > etc/group << "EOF"
root:x:0:
bin:x:1:daemon
sys:x:2:
kmem:x:3:
tape:x:4:
tty:x:5:
daemon:x:6:
floppy:x:7:
disk:x:8:
lp:x:9:
dialout:x:10:
audio:x:11:
video:x:12:
utmp:x:13:
usb:x:14:
cdrom:x:15:
adm:x:16:
console:x:17
messagebus:x:18:
cdrw:x:18
news:x:19
scanner:x:20
wheel:x:21
network:x:22
plugdev:x:23
users:x:24
power:x:25
mail:x:34:
nogroup:x:99:
EOF

	mkdir -vp etc/sysconfig
	cat > etc/sysconfig/ifconfig.eth0 << EOF
ONBOOT=yes
IFACE=eth0
SERVICE=ipv4-static
IP=$IP
GATEWAY=$GATEWAY
PREFIX=24
BROADCAST=${SUBNET}
EOF

	cat > etc/resolv.conf << EOF
# Begin /etc/resolv.conf

domain local
$(for i in $NAMESERVERS;do echo nameserver $i;done)
# End /etc/resolv.conf
EOF

	cat > etc/hosts << EOF
# Begin /etc/hosts (network card version)

127.0.0.1 localhost
$IP $LFSNAME $LFSNAME.local

# End /etc/hosts (network card version)
EOF

	echo "HOSTNAME=$LFSNAME" > etc/sysconfig/network

	cat > etc/sysconfig/clock << "EOF"
# Begin /etc/sysconfig/clock

UTC=1

# Set this to any options you might need to give to hwclock,
# such as machine hardware clock type for Alphas.
CLOCKPARAMS=

# End /etc/sysconfig/clock
EOF

	cat > etc/sysconfig/console << EOF
# Begin /etc/sysconfig/console

KEYMAP=$KEYBOARD
#FONT="lat2a-16 -m 8859-2"

# End /etc/sysconfig/console
EOF

	cat > etc/profile << EOF
# Begin /etc/profile

export LANG=$LANGUAGE

pathremove ()
{
	local IFS=':'
	local NEWPATH
	local DIR
	local PATHVARIABLE=\${2:-PATH}
	for DIR in \${!PATHVARIABLE}
		do
			if [ "\$DIR" != "\$1" ];then
				NEWPATH=\${NEWPATH:+\$NEWPATH:}\$DIR
			fi
        done
        export \$PATHVARIABLE="\$NEWPATH"
}

pathprepend ()
{
	pathremove \$1 \$2
	local PATHVARIABLE=\${2:-PATH}
	export \$PATHVARIABLE="\$1\${!PATHVARIABLE:+:\${!PATHVARIABLE}}"
}

pathappend ()
{
	pathremove \$1 \$2
	local PATHVARIABLE=\${2:-PATH}
	export \$PATHVARIABLE="\${!PATHVARIABLE:+\${!PATHVARIABLE}:}\$1"
}

export -f pathremove pathprepend pathappend

# Set the initial path

export PATH=/bin:/usr/bin
export HISTSIZE=1000
export HISTIGNORE="&:[bf]g:exit"

if [ \$EUID -eq 0 ];then
	pathappend /sbin:/usr/sbin
	#unset HISTFILE
fi

export XDG_DATA_DIRS=\${XDG_DATA_DIRS:-/usr/share/}
export XDG_CONFIG_DIRS=\${XDG_CONFIG_DIRS:-/etc/xdg/}
export XDG_RUNTIME_DIR=\${XDG_RUNTIME_DIR:-/tmp/xdg-\$USER}

# Setup a red prompt for root and a green one for users.
NORMAL="\[\e[0m\]"
RED="\[\e[1;31m\]"
GREEN="\[\e[1;32m\]"
if [[ \$EUID == 0 ]] ; then
	PS1=''\${RED}'\u@\h [ '\${NORMAL}'\w '\${RED}']$'\${NORMAL}' '
else
	PS1=''\${GREEN}'\u@\h [ '${NORMAL}'\w '\${GREEN}']$'\${NORMAL}' '
fi

for script in /etc/profile.d/*.sh
	do
		if [ -r \$script ];then
			. \$script
		fi
	done

unset script RED GREEN NORMAL

# End /etc/profile
EOF

	cat > etc/inputrc << "EOF"
# Begin /etc/inputrc
# Modified by Chris Lynn <roryo@roryo.dynup.net>

# Allow the command prompt to wrap to the next line
set horizontal-scroll-mode Off

# Enable 8bit input
set meta-flag On
set input-meta On

# Turns off 8th bit stripping
set convert-meta Off

# Keep the 8th bit for display
set output-meta On

# none, visible or audible
set bell-style none

# All of the following map the escape sequence of the value
# contained in the 1st argument to the readline specific functions
"\eOd": backward-word
"\eOc": forward-word

# for linux console
"\e[1~": beginning-of-line
"\e[4~": end-of-line
"\e[5~": beginning-of-history
"\e[6~": end-of-history
"\e[3~": delete-char
"\e[2~": quoted-insert

# for xterm
"\eOH": beginning-of-line
"\eOF": end-of-line

# for Konsole
"\e[H": beginning-of-line
"\e[F": end-of-line

# End /etc/inputrc
EOF

swapline="$(lsblk -no UUID $SWAP 2>/dev/null)"  && swapline="UID=$(lsblk -no UUID $SWAP 2>/dev/null)" || [ -n $SWAP ] && [ -e "$SWAP" ] && swapline="$SWAP" || swapline="#"

	cat > etc/fstab << EOF
# Begin /etc/fstab

#file system					mount-point	type		options			dump	fsck order

UUID=$(findmnt -no UUID $LFS)	/		$ROOTFSTYPE		defaults		1		1
$swapline	swap		swap		pri=1			0		0

proc						/proc		proc		nosuid,noexec,nodev	0		0
sysfs						/sys		sysfs		nosuid,noexec,nodev	0		0
devpts						/dev/pts	devpts		gid=5,mode=620		0		0
tmpfs						/run		tmpfs		defaults		0		0
devtmpfs					/dev		devtmpfs	mode=0755,nosuid	0		0

# End /etc/fstab
EOF

	cat > etc/inittab << "EOF"
# Begin /etc/inittab

id:3:initdefault:

si::sysinit:/etc/rc.d/init.d/rc S

l0:0:wait:/etc/rc.d/init.d/rc 0
l1:S1:wait:/etc/rc.d/init.d/rc 1
l2:2:wait:/etc/rc.d/init.d/rc 2
l3:3:wait:/etc/rc.d/init.d/rc 3
l4:4:wait:/etc/rc.d/init.d/rc 4
l5:5:wait:/etc/rc.d/init.d/rc 5
l6:6:wait:/etc/rc.d/init.d/rc 6

ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now

su:S016:once:/sbin/sulogin

1:2345:respawn:/sbin/agetty --noclear tty1 9600
2:2345:respawn:/sbin/agetty tty2 9600
3:2345:respawn:/sbin/agetty tty3 9600
4:2345:respawn:/sbin/agetty tty4 9600
5:2345:respawn:/sbin/agetty tty5 9600
6:2345:respawn:/sbin/agetty tty6 9600

# End /etc/inittab
EOF

	echo $LFSVERSION > etc/lfs-release
	cat > etc/lsb-release << EOF
DISTRIB_ID="Linux From Scratch"
DISTRIB_RELEASE="$LFSVERSION"
DISTRIB_CODENAME="$LFSNAME"
DISTRIB_DESCRIPTION="Linux From Scratch"
EOF

	cat > etc/shells << EOF
# Begin /etc/shells

/bin/sh
/bin/bash

# End /etc/shells
EOF

	if [ ! -e etc/lfspkg.rc ];then
		cat > etc/lfspkg.rc << EOF
LFSVERSION=$LFSVERSION
KERNELVERSION=$KERNELVERSION
LIBDIRSUFFIX=$LIBDIRSUFFIX
SCRIPTLOG=1
OUTPUT=$PKGARCHIVES
SOURCEARCHIVES=$SOURCEARCHIVES
BUILDSCRIPTS=$BUILDSCRIPTS
COMPILEAT=$COMPILEAT
CONFIGOPTIONS="--disable-option-checking --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/libexec --libdir=/usr/lib\$LIBDIRSUFFIX --disable-debug --disable-nls --disable-static"
MESONCONFIGOPTIONS="--prefix=/usr --sysconfdir=/etc --libexecdir=/usr/libexec --libdir=/usr/lib\$LIBDIRSUFFIX --buildtype=release --default-library=shared"
MAKEFLAGS=" -j4 "
CHECKETC=0
EOF
	fi

#Set the perms for $LFS will fail for any mounted network tha can't have their perms changed ( eg a samba mount ). 
	chown -R root:root $LFS/* 2>/dev/null||true
	touch var/log/{btmp,lastlog,wtmp}
	chmod -v 664 var/log/lastlog
	chmod -v 600  var/log/btmp
	chgrp -v utmp var/log/lastlog
	chmod 777 tmp
popd