#!/bin/bash -xe
PS4='+ ($LINENO) ' # To ease debugging
VERSION="1.0rc1"

# Config #
##########
WORKDIR=./work		# Must not be with "nodev" mount option
DLDIR=./downloads
OUTDIR=./out
OUTUSB=/dev/sdb		# Will wreck everything here !
LEGACY=y		# make USB bootable key compatible with non UEFI-BIOS
DEVEL_MODE=n		# Adds debugging tools in the generated image
INCLUDE_TCPDUMP=y	# tcpdump costs few Mb with libcrypto
ROOTCMD=sudo
WGET="wget"		 # "wget --no-check-certificate" could help but is a security concern
KERNEL_TARBALL_URL=https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.58.tar.xz
KCONFIGLIB_MAIN_URL=https://raw.githubusercontent.com/ulfalizer/Kconfiglib/7eace27993ad3aa1d6911866d9c60a11f32d36d9/kconfiglib.py
KCONFIGLIB_PATCH_URL=https://raw.githubusercontent.com/ulfalizer/Kconfiglib/7eace27993ad3aa1d6911866d9c60a11f32d36d9/makefile.patch
#NIC_FIRMWARE_URL=http://fr.archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/nic-firmware_1.169_all.udeb
BUSYBOX_BIN_URL=https://busybox.net/downloads/binaries/1.26.2-defconfig-multiarch/busybox-x86_64
PCI_IDS_URL=https://pci-ids.ucw.cz/v2.2/pci.ids
USB_IDS_URL=https://usb-ids.gowdy.us/usb.ids

# Utilities #
#############
function add_initrd_script
{
	( echo "#!/bin/busybox sh" ; cat ) > "$WORKDIR/initrd/$1"
	chmod +x "$WORKDIR/initrd/$1"
}

# From https://landley.net/writing/rootfs-programming.html
# Its first argument is the new directory, and the rest of its arguments are executables to copy.
function mkchroot
{
  [ $# -lt 2 ] && return 0
  dest=$1
  shift
  for i in "$@"
  do
    # Get an absolute path for the file
    p=$i
    [ "${p:0:1}" == "/" ] || p=$(which $i) || true
    if [ ! -e "$p" ]
    then echo "mkchoot not found: $i"
         return 1
    fi
    # Skip files that already exist at target.
    [ -f "$dest/$p" ] && continue
    # Create destination path
    d=$(echo "$p" | grep -o '.*/') &&
    mkdir -p "$dest/$d" &&
    # Copy file
    echo + cp --dereference --preserve=all "$p" "$dest/$p" &&
    cp --dereference --preserve=all "$p" "$dest/$p" &&
    # Recursively copy shared libraries' shared libraries.
    mkchroot "$dest" $(ldd "$p" | egrep -o '/.* ') || return $?
  done
}

# Environement and dependencies #
#################################
codename=$(lsb_release -sc || true)
if [ "x$codename" != "xjessie" ]
then	cat >&2 <<EOT
This script is tested only on Debian 8 (aka jessie).
The fastest way to have the right environment is :
 * download debian live http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-8.5.0-amd64-standard.iso
 * burn it or copy it on a USB stick (as raw, with "cp XX.iso /dev/sdX"), alternatively launch a VM with it
 * download and run this script from there
 * grab the generated out/BOOTX64.EFI
EOT
	exit 1
fi

[ -d "$WORKDIR" ] || mkdir "$WORKDIR"
[ -d "$DLDIR" ] || mkdir "$DLDIR"
[ -d "$OUTDIR" ] || mkdir "$OUTDIR"

if [ ! -e "$WORKDIR/apt-done" ]
then	if ! ls /var/lib/apt/lists/*_jessie-backports_* >/dev/null
	then	echo 'deb http://ftp.debian.org/debian jessie-backports main' \
			| $ROOTCMD tee /etc/apt/sources.list.d/backports.list
	fi
	$ROOTCMD apt-get update
	# Dependencies of this script (assuming default debian install or live)
	$ROOTCMD apt-get install wget libncurses5-dev coreutils
	[ "x$LEGACY" == "xy" ] && $ROOTCMD apt-get install mbr syslinux
	# Dependencies for kernel building
	$ROOTCMD apt-get build-dep linux-source
	# Dependencies for kernel tools
	[ "x$DEVEL_MODE" == "xy" ] && $ROOTCMD apt-get install libelf-dev libunwind-dev \
		libdw-dev libaudit-dev libssl-dev libslang2-dev libiberty-dev flex bison
	# Optionnally qemu to run the result for santity checking
	[ "x$DEVEL_MODE" = "xy" ] && $ROOTCMD apt-get install qemu-system-x86
	# Dependencies to put into the initrd
	$ROOTCMD apt-get install dmidecode pciutils usbutils lshw sysstat iftop strace \
		ntfs-3g e2fsprogs partclone util-linux udpcast gdisk efibootmgr pigz \
		pv bc figlet toilet-fonts ncurses-bin beep net-tools ethtool
	# Optionnal dependencies to put into the initrd
	[ "x$INCLUDE_TCPDUMP" == "xy" ] && $ROOTCMD apt-get install tcpdump

	# util-linux : fdisk, sfdisk, lsblk, setterm
	# net-tools : mii-tool
	# ncurses-bin : tput
	$ROOTCMD apt-get -t jessie-backports install tmux
	> "$WORKDIR/apt-done"
fi

# Kernel build setup #
######################
kernel_tarball=$DLDIR/$(basename $KERNEL_TARBALL_URL)
[ -f "$kernel_tarball" ] || $WGET -O "$kernel_tarball" "$KERNEL_TARBALL_URL"
if [ ! -d "$WORKDIR/kernel" ]
then	mkdir "$WORKDIR/kernel"
	tar xf "$kernel_tarball" --strip-components=1 -C "$WORKDIR/kernel"
fi

if [ ! -d "$WORKDIR/kernel/scripts/Kconfiglib" ]
then
	[ -f "$DLDIR/kconfiglib.py" ] || $WGET -O "$DLDIR/kconfiglib.py" "$KCONFIGLIB_MAIN_URL"
	[ -f "$DLDIR/makefile.patch" ] || $WGET -O "$DLDIR/makefile.patch" "$KCONFIGLIB_PATCH_URL"
	mkdir "$WORKDIR/kernel/scripts/Kconfiglib"
	cp "$DLDIR/kconfiglib.py" "$WORKDIR/kernel/scripts/Kconfiglib/kconfiglib.py"
	patch -t -p1 -d "$WORKDIR/kernel" < "$DLDIR/makefile.patch"
fi

cat >"$WORKDIR/kernel/scripts/Kconfiglib/customize.py" <<"EOT"
#!/usr/bin/env python
import kconfiglib
import sys

def sset(sym, value=None):
    if not sym.is_modifiable():
        print("%s is not modifiable at all"%(sym.get_name()))
        return True
    if value is None and sym.get_type() in [ kconfiglib.BOOL, kconfiglib.TRISTATE ]:
        value = sym.get_upper_bound()
    old_value = sym.get_value()
    if old_value == value:
        return False
    print("CONFIG_%s=%s [was: %s]"%(sym.get_name(),value,old_value))
    sym.set_user_value(value)
    return True

debug = '--debug' in sys.argv;
conf = kconfiglib.Config(sys.argv[1])
conf.load_config('.config')
support_xz = conf['KERNEL_XZ'] is not None
menu_netfs = conf['NETWORK_FILESYSTEMS']
i = 0
more_work = True
while more_work and i < 10:
    more_work = False
    i += 1
    print("Kconfiglib/customize.py pass %i"%i)

    for sym in conf.get_symbols():
        name = sym.get_name()

        # Default hostname is (none) and could make FreeBSD's dhcpd complain because unallowed '()'
        if name in ['DEFAULT_HOSTNAME']:
            more_work = sset(sym, 'eficast') or more_work

        # Embed initrd in the EFI bootable kernel
        if name in ['INITRAMFS_SOURCE']:
            more_work = sset(sym, '../initrd/') or more_work

        # Make kernel directly loadable by EFI
        if name in ['EFI_STUB', 'EFI_VARS']:
            more_work = sset(sym) or more_work

	# Support FUSE for ntfs-3g, Dell flash, USB3, PC Speaker, NVMe (PCIe) SSD
        if name in ['FUSE_FS', 'DELL_RBU', 'USB_XHCI_HCD', 'IKCONFIG', 'INPUT_PCSPKR', 'BLK_DEV_NVME']:
            more_work = sset(sym, 'm') or more_work

        # Support soft RAID (linux) and hard RAID (some cards)
        if name in ['SCSI_LOWLEVEL', 'MEGARAID_NEWGEN']:
            more_work = sset(sym) or more_work
        if name in ['DM_RAID', 'MEGARAID_SAS']:
            more_work = sset(sym, 'm') or more_work

        # If --debug passed as arg, make kernel aware of virtual drivers (used for testing eficast on qemu/kvm)
        if debug and name in ['VIRTIO_PCI', 'VIRTIO_MMIO', 'VIRTIO_NET', 'VIRTIO_BLK', 'SCSI_VIRTIO']:
            more_work = sset(sym, 'm') or more_work

	# Disable all Network Filesystems support except after-boot NFSv3 client
	if name not in ['NET_FS', 'NFS_V3'] and menu_netfs in sym.get_referenced_symbols():
            more_work = sset(sym, 'n') or more_work
	
        # Disable thing that are unneeded or annoying for the purpose of disk cloning
        if name in ['LOGO', 'SUSPEND', 'HIBERNATION', 'CPU_FREQ', 'PCCARD', 'HAMRADIO', 'WIRELESS', 'RFKILL', 'WLAN', 'SOUND', 'NFS_V2', 'NFS_V4', 'ROOT_NFS', 'SECURITY', 'VIRTUALIZATION']:
            more_work = sset(sym, 'n') or more_work

        # Compress everything with XZ if available (slower, smaller)
#FIXME : marche pas en 3.x
        if support_xz:
            if name in ['KERNEL_XZ']:
                more_work = sset(sym) or more_work
            if name in ['RD_GZIP', 'RD_BZIP2', 'RD_LZMA', 'RD_LZO', 'RD_LZ4']:
                more_work = sset(sym, 'n') or more_work

        # Following generic actions are meant for features, not choices
        if not sym.is_choice_symbol():

            # Build all available net/ethernet drivers
            if sym.is_modifiable() and True in [ ('drivers/net/ethernet' in filename) for (filename,_) in sym.get_def_locations() ]:
                if sym.get_type() == kconfiglib.BOOL:
                    more_work = sset(sym) or more_work
                if sym.get_type() == kconfiglib.TRISTATE:
                    more_work = sset(sym, 'm') or more_work

if i == 10:
    print("ERROR : can't set some of kernel config symbols after 10 passes")
    sys.exit(1)
else:
    sys.exit( conf.write_config(".config") )
EOT
chmod +x "$WORKDIR/kernel/scripts/Kconfiglib/customize.py"

# Kernel prepare + make tools #
###############################
(
	cd "$WORKDIR/kernel"
	if [ ! -f .config ]
	then	make defconfig
		if [ "x$DEVEL_MODE" == "xy" ]
		then extra="SCRIPT_ARG=--debug"
		else extra=""
		fi
		make scriptconfig SCRIPT=scripts/Kconfiglib/customize.py $extra
	fi
)

p="$WORKDIR/kernel/tools/perf/perf"
if [ "x$DEVEL_MODE" == "xy" -a ! -f "$p" ]
then	(
		cd "$WORKDIR/kernel"
		make tools/perf
	)
fi

# Initial Ram Disk building (embed in kernel) #
###############################################
if [ ! -d "$WORKDIR/initrd" ]
then	mkdir -p "$WORKDIR/initrd/"{bin,dev,etc/rc.d,mnt/nfs,root,proc,root,sbin,sys,run/lock,run,tmp,usr/share/udhcpc,var/log}
	$ROOTCMD cp -a /dev/{null,console,tty1} "$WORKDIR/initrd/dev/"
	$ROOTCMD chmod 1777 "$WORKDIR/initrd/run/lock"
	touch "$WORKDIR/initrd/etc/fstab"
	ln -s "/proc/mounts" "$WORKDIR/initrd/etc/mtab"
	ln -s "../run" "$WORKDIR/initrd/var/run"
	ln -s "../run/lock" "$WORKDIR/initrd/var/lock"
	echo 'root::0:0:root:/root:/bin/sh' > "$WORKDIR/initrd/etc/passwd"
	echo 'root:x:0:' > "$WORKDIR/initrd/etc/group"
fi

# XXX workaround, kernel makefile's cpio preseves everything and it is not so cool for us
$ROOTCMD chown -R $USER: "$WORKDIR/initrd"

if [ ! -f "$WORKDIR/initrd/bin/busybox" ]
then	[ -f "$DLDIR/busybox" ] || $WGET -O "$DLDIR/busybox" "$BUSYBOX_BIN_URL"
	cp -a "$DLDIR/busybox" "$WORKDIR/initrd/bin/busybox"
	chmod +x "$WORKDIR/initrd/bin/busybox"
	ln -s /bin/busybox "$WORKDIR/initrd/init"
fi

if [ ! -f "$WORKDIR/initrd/etc/keys.bmap" ]
then	# When using sudo with password auth, ask and cache pass first
	$ROOTCMD true
	# The following compound command will suck at asking pass
	$ROOTCMD dumpkeys | $ROOTCMD loadkeys -b > "$WORKDIR/initrd/etc/keys.bmap"
	cp -a /etc/localtime "$WORKDIR/initrd/etc/"
fi

if [ ! -f "$WORKDIR/initrd/usr/sbin/partclone.restore" ]
then	(
		set +x
		PATH="$WORKDIR/kernel/tools/perf:/usr/sbin:/usr/bin:/sbin:/bin"
		# Diagnostic tools
		mkchroot "$WORKDIR/initrd" dmidecode iftop iostat lshw lspci lsblk lsusb mpstat
		# Console tools and manpages display
		mkchroot "$WORKDIR/initrd" tput setterm strace groff nroff troff grotty gtbl tmux bc pv figlet beep
		# Filesystem tools
		mkchroot "$WORKDIR/initrd" mkfs mke2fs /sbin/mkfs.ext* mkntfs mkfs.ntfs mkfs.fat mkexfatfs mkfs.exfat mkfs
		mkchroot "$WORKDIR/initrd" ntfs-3g mount.ntfs mount.fuse mount.exfat-fuse mount.exfat
		mkchroot "$WORKDIR/initrd" /sbin/ntfs* /bin/ntfs*
		# Network tools
		mkchroot "$WORKDIR/initrd" mii-tool ethtool
		# Disk tools
		mkchroot "$WORKDIR/initrd" fdisk gdisk sfdisk sgdisk
		# Cloning tools
		mkchroot "$WORKDIR/initrd" /usr/sbin/partclone* efibootmgr pigz udp-receiver scp rsync
		# Some dyn-loaded libraries (ldd will not display them)
		mkchroot "$WORKDIR/initrd" /lib/x86_64-linux-gnu/libusb-1.0.so.0

		if [ "x$INCLUDE_TCPDUMP" == "xy" ]
		then	# tcpdump costs few Mb with libcrypto
			mkchroot "$WORKDIR/initrd" tcpdump
		fi

		# Some needed data files
		cp -ra /lib/terminfo "$WORKDIR"/initrd/lib/
		mkdir -p "$WORKDIR"/initrd/usr/lib/locale "$WORKDIR"/initrd/usr/share/figlet
		cp -ra /usr/lib/locale/C.UTF-8 "$WORKDIR"/initrd/usr/lib/locale/
		cp -a /usr/share/figlet/{standard,mono12}* "$WORKDIR"/initrd/usr/share/figlet/
	)
fi

if [ "x$DEVEL_MODE" == "xy" ]
then	(
		# Perf tool
		p="$WORKDIR/kernel/tools/perf/perf"
		cp -a "$p" "$WORKDIR/initrd/sbin/"
		set +x
		mkchroot "$WORKDIR/initrd" $(ldd "$p" | egrep -o '/.* ')
	)
fi

if [ ! -d "$WORKDIR/initrd/usr/man" ]
then	mkdir -p "$WORKDIR"/initrd/usr/man/man{1,6,8} "$WORKDIR"/initrd/usr/share/groff/current/font
	mkdir -p "$WORKDIR"/initrd/etc/groff/

	cp -a /usr/share/man/man1/{beep,iostat,lshw,mpstat,setterm,bc,pv,strace,tmux,pigz,udp-receiver}* "$WORKDIR"/initrd/usr/man/man1/
	cp -a /usr/share/man/man6/figlet* "$WORKDIR"/initrd/usr/man/man6/
	cp -a /usr/share/man/man8/{dmidecode,iftop,lspci,lsblk,lsusb,partclone,efibootmgr,mkfs}* "$WORKDIR"/initrd/usr/man/man8/
	cp -a /usr/share/man/man8/{ntfs,mkntfs,mkexfatfs,mount.ntfs,mount.fuse,mount.exfat-fuse}* "$WORKDIR"/initrd/usr/man/man8/
	cp -a /usr/share/man/man8/{mount.exfat,fdisk,gdisk,sfdisk,sgdisk,tcpdump,mii-tool,ethtool}* "$WORKDIR"/initrd/usr/man/man8/

	cp -ra /usr/share/groff/current/font/devascii "$WORKDIR"/initrd/usr/share/groff/current/font/
	cp -ra /usr/share/groff/current/tmac "$WORKDIR"/initrd/usr/share/groff/current/
	cp -a /etc/groff/man.local "$WORKDIR"/initrd/etc/groff/
fi

p="$WORKDIR/kernel/tools/perf/perf"
if [ "x$KERNEL_TOOLS" == "xy" -a ! -f "$p" ]
then	(
		cp -a "$p" "$WORKDIR/initrd/sbin/"
		set +x
		mkchroot "$WORKDIR/initrd" $(ldd "$p" | egrep -o '/.* ')
	)
fi

if [ ! -d "$WORKDIR/initrd/var/lib" ]
then	[ -f "$DLDIR/pci.ids" ] || $WGET -O "$DLDIR/pci.ids" "$PCI_IDS_URL"
	[ -f "$DLDIR/usb.ids" ] || $WGET -O "$DLDIR/usb.ids" "$USB_IDS_URL"
	mkdir -p "$WORKDIR/initrd/var/lib/usbutils" "$WORKDIR/initrd/usr/share/misc"
	cp "$DLDIR/usb.ids" "$WORKDIR/initrd/var/lib/usbutils/"
	cp "$DLDIR/pci.ids" "$WORKDIR/initrd/usr/share/misc/"
fi

#if [ ! -d "$WORKDIR/initrd/lib/firmware" ]
#then	[ -f "$DLDIR/nic-firmware.deb" ] || $WGET -O "$DLDIR/nic-firmware.deb" "$NIC_FIRMWARE_URL"
#	dpkg -x "$DLDIR/nic-firmware.deb" "$WORKDIR/initrd/"
#	find "$WORKDIR/initrd/lib/firmware/" \( -name 'ipw*' -o -name 'brcmfmac*' -o -name '*wifi*' \) -print0 | xargs -r0 rm -v
#fi

echo $VERSION > "$WORKDIR/initrd/etc/eficast_version"

cat > "$WORKDIR/initrd/etc/rc.d/funcs" <<"EOF"
# echo_color <foreground_color> <background_color> [prefix_string] <message>
echo_color() {
	setterm --foreground "$1" --background "$2"
	echo -n "$3"
	setterm --foreground white --background black
	[ "x$4" == "xversion" ] && echo " (eficast v"$(cat /etc/eficast_version)")" || echo
}

# no args, print colored message, wait 10 sec and reboot
eficast_end() {
	echo -e "\e]2;eficast_end\007"	# Term title (tmux), intentionnal carriage return
	echo_color white green "----- EFICAST end of execution  ------"
	( sfx_success ; touch /run/nosound ) &
	[ -r touch /run/eficast_end ] && action=$(cat /run/eficast_end)
	case $action in
		poweroff) 	read -t10 -p 'Ctrl+C to have a shell, Enter to skip wait time for poweroff...'
				poweroff
				;;
		reboot)		read -t10 -p 'Ctrl+C to have a shell, Enter to skip wait time for reboot...'
				reboot
				;;
		*)		echo "Dropping a shell (consider putting poweroff or reboot in /run/eficast_end)"
				PS1='\h:\w# ' HOME='/root/' /bin/busybox sh
				;;
	esac
}

# note : rcS rescue_shell is slighly different because most of the env is not ready in rcS
rescue_shell() {
	echo -e "\e]2;rescue_shell\007"	# Term title (tmux), intentionnal carriage return
	echo_color white red "Something went wrong. Dropping to a shell." version
	( sfx_failure ; touch /run/nosound ) &
	PS1='\h:\w# ' HOME='/root/' /bin/busybox sh
}

machine_info() {
	setterm -bold on
	grep -F MemTotal: /proc/meminfo
	for k in system-manufacturer system-product-name \
		baseboard-manufacturer baseboard-product-name \
		bios-version bios-release-date
	do
		echo $k: $(dmidecode -s $k)
	done
	lspci -nn | cut -d' ' -f2- | sed -ne 's/^Ethernet[^:]*/network-card/p'
	ip -o l | sed -ne 's/[0-9]*: \([^:]*\):[^\\]*\\\s*link\/ether\s/network-mac-\1: /p'
	lsblk -dnl | sed 's/^/disk: /'
	lsusb 2>/dev/null | grep -vE hub$ | cut -d: -f2- | sed 's/^ ID/usb-device:/'
	setterm -bold off
}

network_conf() {
	pidof udhcpc >/dev/null && killall udhcpc # Reap background udhcpc in case of rc2 retry
	ip -oneline link | grep LOWER_UP | cut -d: -f2 | grep -v sit | grep -v lo | while read iface
	do
		udhcpc -b $iface -t 15
	done
}

network_show() {
	setterm -bold on
	ip -o addr show | sed -ne 's/[0-9]*:\s*\(\S*\)\s*inet6*\s\(\S*\)\s.*$/\1: \2/p'
	setterm -bold off
}

autorun() {
	echo_color green black "$1-autorun.sh script will run on tmux-main-pane now"
	read -t10 -p 'Ctrl+C to have a shell, Enter to skip wait time...'

	# tmux since 2.x absolutly wants a working UTF-8 locale (C.UTF-8 is okay)
	# pane-border-* options are supported since tmux 2.3
	tmux \
		new-session -d "/etc/rc.d/tmux-main-pane $1" \; \
		set -g pane-border-status top \; \
		set -g pane-border-format " #T " \; \
		set-window-option status off \; \
		split-window -t %0 -l1 -b pigz-watch progression
	
	if [ $(tput lines) -gt 30 ]
	then tmux \
		split-window -t %0 -l5 mpstat-watch cpu-softintr \; \
		split-window -t %0 -l10 iostat-watch cpu-disk \; \
		split-window -h -p26 pstree-watch processes \; \
		split-window -t -1 iftop-watch network
	fi

	tmux select-pane -t:.0 \; attach

	# Hack to keep the error flow intact
	if [ -r /run/autorun_res ]
	then	res=$(cat /run/autorun_res)
		rm /run/autorun_res
	else	res=1
	fi
	echo_color green black "tmux-main-pane exit code : $res"
	return $res
}

notes() {
  echo 'print "n=CCDEEFFGAABB\na=nsnbnnsnbnbn\n(\n"; for (d=21;d<109;d++) {
      scale=20; f=440*e((d-69)/12*l(2)); fr=f+0.5; scale=0; fr=fr/1; o=d/12-1; t=d%12;
      print "echo ${n:",t,":1}${a:",t,":1}",o,"=",fr,"\n"
    }; print ") | tr -d n"' | bc -l | busybox sh
}

sound() {
	[ -f /run/nosound ] && return 0
	mode=$1; dur=$2; shift 2; args="-l0"
	while [ -n "$1" ]; do
		case $mode in
			1) args="$args -n -f$1 -l$dur";;
			2) args="$args -n -f$1 -l$(($2*dur))";;
			3) args="$args -n -f$1 -l$(($2*dur)) -D$(($3*dur))";;
		esac
		shift $mode
	done
	beep $args
}

sfx_question() { sound 2 50 $E7 2 $C7 2 $E7 2 $C7 3; }
sfx_success() { sound 1 140 $E6 $G6 $E7 $C7 $D7 $G7 ; }
sfx_failure() { sound 3 100 $C5 1 3 $G4 1 3 $E4 3 0 $A4 2 0 $B4 2 0 $A4 2 0 $Ab4 3 0 $Bb4 3 0 $Ab4 3 0 $G4 6 0 ; }
sfx_starting() { sound 1 25 $C5 $G4 $C5 $E5 $G5 $C6 $G5 $Ab4 $C5 $Eb5 $Ab5 $Eb5 $Ab5 $C6 $Eb6 $Ab6 $Eb6 $Bb4 $D5 $F5 $Bb5 $D6 $F6 $Bb6 $F6 ; }

eval $(notes)
EOF

# All shell spawned here must be login-shell, will load /etc/profile
cat > "$WORKDIR/initrd/etc/inittab" <<"EOF"
# Custom init scripts
::sysinit:/etc/rc.d/rcS
# Standard things follow
::ctrlaltdel:/sbin/reboot -f
::shutdown:/sbin/swapoff -a
::shutdown:/bin/umount -a -r
::restart:/sbin/init
tty1::respawn:/bin/sh -lc /etc/rc.d/rc2-or-rescue
tty2::askfirst:/bin/sh -l
tty3::askfirst:/bin/sh -l
EOF
cat > "$WORKDIR/initrd/etc/profile" <<"EOF"
export LC_ALL=C.UTF-8
export TERM=linux # busybox on qemu set vt102, then tmux segfaults
# https://git.busybox.net/busybox/tree/init/init.c, search for VT_OPENQRY
# happens if qemu pass "-append console=ttyS0" or similar to the kernel
EOF

add_initrd_script "/etc/rc.d/rcS" <<"EOF"
echo -e '\e[37;42m'----- EFICAST start of execution  ------'\e[0m'
echo -e '\e[32m/etc/rc.d/rcS script will run on /dev/console now\e[0m'
echo -e '\e[37;43m'----- rcS script started -----'\e[0m'	# Hint for user about boot steps if its hangs

# Declare some funcs to have a tidy output with trace mode
# note : rc.d/funcs rescue_shell is slighly different the environnement is ready to go
rescue_shell() {
	busybox echo -e '\e[37;41m'Something went wrong. Dropping to a shell.'\e[0m'
	busybox beep
	PS1='\h:\w# ' busybox setsid busybox cttyhack busybox sh
	busybox sync; busybox umount /dev/pts /dev /sys /proc
	busybox reboot -f
}

mount_pseudofilesystems() {
	# Mount pseudo-filesystems
	mount -t proc none /proc || return $?
	mount -t sysfs none /sys || return $?
	mount -t devtmpfs -o size=1m none /dev || return $?
	mkdir /dev/pts || return $?
	mount -t devpts none /dev/pts || return $?
	ln -s /proc/self/fd/2 /dev/stderr
	return 0
}

coldplugging() {
	echo 4 > /proc/sys/kernel/printk
	for d in /sys/bus/*/devices/*
	do
		cd $d
		[ -r driver ] || echo add > uevent
	done
	sleep 3
	cut -f4 /proc/sys/kernel/printk > /proc/sys/kernel/printk
}

network_up() {
	ip -oneline link | grep DOWN | cut -d: -f2 | grep -v sit | while read iface
	do
		echo ip link set dev $iface up
		ip link set dev $iface up
	done
}

# Trace execution
set -v
/bin/busybox --install -s||rescue_shell	# Setup busybox symlinks for all applets
mount_pseudofilesystems || rescue_shell	# Setup /dev, /proc, /sys and so
klogd; syslogd				# Start logging in /var/log/messages
mount -o remount -o size=80% /		# Allow using most of RAM for rootfs
coldplugging				# Load modules for cold-plugged peripherials
network_up				# Bring net interfaces up (no config) 
loadkmap < /etc/keys.bmap		# Load keyboard layout
sleep 5 	# Wait for physical link detection + STP + IPv6 DAD & Autoconf
set +v
# Hint users about boot steps to help them if it hangs
echo -e '\e[32m/etc/rc.d/rc2-or-rescue script will run on /dev/tty1 now\e[0m'
echo -e '\e[37;43m----- rcS script ended -----\e[0m'
EOF
add_initrd_script "/etc/rc.d/rc2" <<"EOF"
echo -e '\e[37;43m'----- rc2 script started -----'\e[0m'	# Hint for user about boot steps if its hangs
. /etc/rc.d/funcs		# Load helper functions
setterm -blank 60		# screen sleep mode after 60 minutes
set -v				# Trace execution

network_conf
network_show
machine_info

touch /run/nosound
autorun nfs && eficast_end
#autorun initrd && eficast_end
set +v
echo -e '\e[37;43m'----- rc2 script ended -----'\e[0m'	# Hint for user about boot steps if its hangs
EOF
add_initrd_script "/etc/rc.d/initrd-autorun.sh" <<"EOF"
read -t60 -p 'Dummy script. Ctrl+C to have a shell, Enter to skip wait time...'
EOF
add_initrd_script "/etc/rc.d/rc2-or-rescue" <<"EOF"
. /etc/rc.d/funcs		# Load helper functions
if [ -f /run/rescue ]
then	rm /run/rescue
	echo_color green black "/etc/rc.d/rc2 dead. Spawn rescue_shell run on /dev/tty1 now"
	rescue_shell
else	touch /run/rescue
	echo_color green black "/etc/rc.d/rc2 script will run on /dev/tty1 now"
	/etc/rc.d/rc2
fi
EOF
add_initrd_script "/etc/rc.d/tmux-main-pane" <<"EOF"
# Drop a in-tmux rescue shell in case of failure, prevents clearing screen with valuable informations
source /etc/rc.d/funcs		# Load helper functions
# Helper to trap user interruption and error cases
# Will exit the entire tmux, leaving last error code availble in a file
cleanup() {
	res=$?
	echo $res > /run/autorun_res
	if [ $res -ne 0 ]
	then	rm /run/rescue
		echo_color green black "/etc/rc.d/tmux-main-pane is exiting. Spawn rescue_shell in tmux now"
		rescue_shell
	fi
	tmux kill-server
	exit
}
trap cleanup INT TERM

case $1 in
	initrd)	echo -ne "\e]2;initrd-autorun.sh\007" # Term title (tmux)
		message initrd autorun
		source /etc/rc.d/initrd-autorun.sh
		;;
	nfs)	source nfs-mount
		if [ $? -ne 0 ]
		then	echo_color white red "----- NFS server : not mounted ------"
			echo_color green black "Check for failure above. Exiting rescue shell will retry everything"
			false; cleanup
		fi
		if ! [ -x /mnt/nfs/nfs-autorun.sh ]
		then	echo_color white red "----- NFS server : missing script ------"
			echo_color green black "Check nfs-autorun.sh : should be present, readable and executable"
			ls -l /mnt/nfs
			false; cleanup
		fi
		echo_color white green "----- NFS server ready ------"
		message nfs autorun
		echo -ne "\e]2;nfs-autorun.sh\007" # Term title (tmux)
		cd /mnt/nfs
		# don't use source here, exit in inner script will skip cleanup routine (and rescue_shell)
		./nfs-autorun.sh
		;;
	*)	echo "Usage : $0 (nfs|initrd)"
		false;;
esac
cleanup
# Don't add code between esac and cleanup, $? is used
EOF
add_initrd_script "/sbin/hotplug" <<"EOF"
# Be verbose for PCI cards, be silent for the rest (many many things), log everything
# No support for change or remove events
# Could run very early, before busybox links installation
if [ "x$ACTION" = "xadd" ]
then	if [ -n "$PCI_ID" ]
	then	if [ -n "$MODALIAS" ]
		then	echo "$0: PCI_ID==$PCI_ID, starting 'modprobe $MODALIAS'"
		else	echo -e "\e[37;43m$0: PCI_ID==$PCI_ID, no MODALIAS found\e[0m"
		fi
		modprobe -v $MODALIAS 2>&1 | busybox awk -vT="$0: DEVPATH=$DEVPATH PCI_ID==$PCI_ID " '{print T $0 }' | tee -a /var/log/hotplug-pci.log

	else	if [ -n "$MODALIAS" ]
		then	modprobe -v $MODALIAS 2>&1 | busybox awk -vT="$0: DEVPATH=$DEVPATH MODALIAS==$MODALIAS " '{print T $0 }' >> /var/log/hotplug-non-pci.log
		else	echo "$0: DEVPATH=$DEVPATH no MODALIAS found" >> /var/log/hotplug-non-pci.log
		fi
	fi
else	echo "$0: DEVPATH=$DEVPATH : no support for '$ACTION'" >> /var/log/hotplug-unsupported.log
fi > /dev/console 2>&1
EOF
add_initrd_script "/bin/nfs-mount" <<"EOF"
echo -ne "\e]2;$0\007"	# Term title (tmux)
set -v			# Trace execution
mount -v -t nfs -o nolock 172.16.2.28:/masters /mnt/nfs
EOF
add_initrd_script "/bin/iftop-watch" <<"EOF"
echo -ne "\e]2;$*\007" # Term title (tmux)
iftop -nNl
EOF
add_initrd_script "/bin/iostat-watch" <<"EOF"
# Emulates watch command with iostat (filtered info, minimal height)
echo -ne "\e]2;$*\007" # Term title (tmux)
iostat -cdmz 1 | awk '$1=="avg-cpu:"{system("clear")} length($0)>0{print}'
EOF
add_initrd_script "/bin/mpstat-watch" <<"EOF"
# Emulates watch command with mpstat
echo -ne "\e]2;$*\007" # Term title (tmux)
while true; do
	mpstat -I SCPU | grep -vE '^(Linux.*|)$'
	sleep 1
done
EOF
add_initrd_script "/bin/pigz-watch" <<"EOF"
# Emulate watch command using pipeview (pv) for a running pigz
echo -ne "\e]2;$*\007" # Term title (tmux)
while true; do
	pid=$(pidof -s pigz)
	[ -n "$pid" ] && pv -F "%N %b %T %t %r %a %p %I" -d $pid
	sleep 1
done
EOF
add_initrd_script "/bin/pstree-watch" <<"EOF"
echo -ne "\e]2;$*\007" # Term title (tmux)
while true; do
	pid=$(pidof tmux-main-pane | tr ' ' '\n' | sort -n | head -n1)
	[ -n "$pid" ] && watch -t "pstree -p $pid"
	sleep 1
done
EOF
add_initrd_script "/bin/lsblk-watch" <<"EOF"
echo -ne "\e]2;$*\007" # Term title (tmux)
watch -t lsblk -o NAME,SIZE,MODEL,SERIAL,FSTYPE,LABEL,MOUNTPOINT
EOF
add_initrd_script "/usr/share/udhcpc/default.script" <<"EOF"
#!/bin/sh
case $1 in
	bound)
		# Configure interface and default gateway
		busybox ifconfig $interface ${mtu:+mtu $mtu} $ip netmask $subnet ${broadcast:+broadcast $broadcast}
		busybox ip -4 route add default via $router dev $interface

		# Update resolver configuration file
		[ -n "$domain" ] && R="domain $domain" || R=""
		for i in $dns; do
			R="$R\nnameserver $i"
		done
		echo -e "$R" > /etc/resolv.conf

		# Update in-kernel-memory hostname
		[ -n "$hostname" ] && hostname $hostname
	;;
	renew | deconf) echo "no action taken: $1: $interface" >&2 ;;
	leasefail | nak) echo "configuration failed: $1: $message" >&2 ;;
esac
EOF
add_initrd_script "/bin/message" <<"EOF"
# Output some center ASCII-art text, one line per argument
printf '\e]2;'"$*"'\e\\' # Term title (tmux)
CMDFIG="figlet -t -f mono12"
while [ -n "$1" ]; do
	termwidth=$(tput cols)
	textlen=$(echo $1 | $CMDFIG | head -n1 | wc -c)
	offset=$(( (termwidth-textlen)/2 ))
	echo $1 | $CMDFIG | awk "{printf \"%${offset}s\"; print}"
	shift
done
EOF

# Kernel build (with embed initramfs) #
#######################################
(
	cd "$WORKDIR/kernel"
	nproc=$(nproc --all)
	nproc=${nproc:-4}
	# This make will produce a kernel with embed initrd without modules
	make -j $((nproc+1))
	# This will complete the inird tree with modules
	INSTALL_MOD_PATH="../initrd/" make modules_install
	# XXX workaround, kernel makefile s cpio preseves everything and it is not so cool for us
	$ROOTCMD chown -R root: "../initrd"
	# XXX Workaround : some kernel version forget to update embed initramfs in certain cases
	[ -f usr/initramfs_data.cpio.gz ] && rm usr/initramfs_data.cpio.gz
	# This produce the final image
	make
)

# Copy / run result EFI file #
##############################
# Workaround : direct kernel boot with libvirt/virt-manager do a chown on BOOTX64.EFI and cp won't overwrite
[ -f "$OUTDIR/BOOTX64.EFI" ] && rm -f "$OUTDIR/BOOTX64.EFI"
cp "$WORKDIR/kernel/arch/x86/boot/bzImage" "$OUTDIR/BOOTX64.EFI"

# Prepare an USB bootable disk if $OUTUSB is set and is has at least 1 primary partition
if [ -n "$OUTUSB" -a -b "${OUTUSB}1" ]
then	[ -d "$WORKDIR/mountpoint" ] || mkdir "$WORKDIR/mountpoint"
	mount | grep -E "^${OUTUSB}1" -q && $ROOTCMD umount "${OUTUSB}1"
	if [ "x$LEGACY" == "xy" ]
	then	$ROOTCMD install-mbr "${OUTUSB}"
		$ROOTCMD sfdisk --activate=1 "$OUTUSB"
		sleep 1 # XXX do a proper udev wait
		$ROOTCMD mount "${OUTUSB}1" "$WORKDIR/mountpoint"
		$ROOTCMD tee "$WORKDIR/mountpoint/syslinux.cfg" > /dev/null <<"EOT"
default eficast
label eficast
 kernel /EFI/BOOT/BOOTX64.EFI
 append from=syslinux
label debug
 kernel /EFI/BOOT/BOOTX64.EFI
 append debug ignore_loglevel bootmem_debug apic=debug show_lapic=all acpi.debug_layer=0xffffffff acpi.debug_level=0xffffffff debugpat initcall_debug pnp.debug=1 sched_debug
label noacpi
 kernel /EFI/BOOT/BOOTX64.EFI
 append noacpi
timeout 10
prompt 1
EOT
	else	$ROOTCMD mount "${OUTUSB}1" "$WORKDIR/mountpoint"
	fi
	[ -d "$WORKDIR/mountpoint/BOOT/EFI" ] || $ROOTCMD mkdir -p "$WORKDIR/mountpoint/EFI/BOOT"
	$ROOTCMD cp "$OUTDIR/BOOTX64.EFI" "$WORKDIR/mountpoint/EFI/BOOT"
	$ROOTCMD umount "$WORKDIR/mountpoint"
fi

[ "x$DEVEL_MODE" == "xy" ] && qemu-system-x86_64 -M q35 -m 256 -kernel "$OUTDIR/BOOTX64.EFI" -enable-kvm -serial stdio -append "console=ttyAMA0 console=ttyS0"