768 lines
19 KiB
Bash
Executable File
768 lines
19 KiB
Bash
Executable File
#!/bin/sh
|
||
|
||
# Functions library :: for Linux Live Kit scripts
|
||
# Original author: Tomas M. <http://www.linux-live.org>
|
||
# Modified by: 'JohnDaH4x0r' <terencedoesmc12 AT gmail DOT com>
|
||
|
||
# related to build script
|
||
# get_exclude: Generate exclude arguments for 'mksquashfs'
|
||
# $1: the exclude list ("$EXCLUDE", if you use .config)
|
||
|
||
get_exclude()
|
||
{
|
||
EXCLUDE_LIST="$1"
|
||
PARENT_DIR="$(echo "$2" | tr -s "/")"
|
||
|
||
if [ -z "$PARENT_DIR" ]; then
|
||
return 1
|
||
elif [ "$PARENT_DIR" = "/" ]; then
|
||
return 1
|
||
fi
|
||
|
||
echo "$EXCLUDE_LIST" | tr " " "\n" | grep "$PARENT_DIR" \
|
||
| while read KEY; do
|
||
echo -n "-e $KEY "
|
||
done
|
||
}
|
||
|
||
# NOTE: DO NOT TOUCH THE ESCAPE CHARACTERS!
|
||
BLUE="[1;34m"
|
||
YELLOW="[1;33m"
|
||
ORANGE="[0;33m"
|
||
GREEN="[1;32m"
|
||
BOLD="[0;1m"
|
||
RED="[1;31m"
|
||
NC="[0m"
|
||
|
||
# debug related
|
||
debug_start()
|
||
{
|
||
if grep -q debug /proc/cmdline; then
|
||
DEBUG_IS_ENABLED=1
|
||
else
|
||
DEBUG_IS_ENABLED=
|
||
fi
|
||
}
|
||
|
||
dbg_shell_start()
|
||
{
|
||
if grep -q 'dbg_shell' /proc/cmdline; then
|
||
DBG_SHELL=1
|
||
else
|
||
DBG_SHELL=
|
||
fi
|
||
}
|
||
|
||
debug_log()
|
||
{
|
||
if [ "$DEBUG_IS_ENABLED" ]; then
|
||
echo "[${GREEN}"' debug '"${NC}]: $@" >&2
|
||
log "debug_log: $*"
|
||
fi
|
||
}
|
||
|
||
# echo related functions
|
||
|
||
# echo fatal tag
|
||
# $1 = text to show
|
||
echo_fatal()
|
||
{
|
||
echo "[${RED}"' fatal '"${NC}] $@" >&2
|
||
}
|
||
|
||
# echo bold
|
||
# $1 = text to show
|
||
#
|
||
echo_bold()
|
||
{
|
||
echo "$BOLD""$@""$NC"
|
||
}
|
||
|
||
# echo livekit tag
|
||
echo_livekit()
|
||
{
|
||
echo "[${BLUE}"'livekit'"${NC}] "
|
||
}
|
||
|
||
echo_livekit_msg()
|
||
{
|
||
echo "[${BLUE}"'livekit'"${NC}] $@"
|
||
}
|
||
|
||
# echo error
|
||
echo_err()
|
||
{
|
||
echo "[${RED}"' error '"${NC}] $@" >&2
|
||
}
|
||
|
||
# echo warn
|
||
echo_warn()
|
||
{
|
||
echo "[${YELLOW}"' warn! '"${NC}] $@" >&2
|
||
}
|
||
|
||
# echo signature
|
||
echo_sign()
|
||
{
|
||
echo "${BOLD}"' Linux Live Kit Improved v1.0 - '"$* ${NC}"
|
||
}
|
||
|
||
# log - store given text in /var/log/livedbg
|
||
log()
|
||
{
|
||
echo "$@" 2>/dev/null >>/var/log/livekit-log
|
||
}
|
||
|
||
echolog()
|
||
{
|
||
echo "$@"
|
||
log "echolog: $@"
|
||
}
|
||
|
||
# show information about the debug shell
|
||
show_debug_banner()
|
||
{
|
||
echo_sign "DEBUGGING MODE"
|
||
echo "The root shell is prepared for you!" >&2
|
||
echo "Type your desired commands or press Ctrl-D to continue booting." >&2
|
||
echo >&2
|
||
}
|
||
|
||
# debug_shell
|
||
# executed when debug boot parameter is present
|
||
#
|
||
debug_shell()
|
||
{
|
||
if [ "$DBG_SHELL" ]; then
|
||
show_debug_banner
|
||
setsid sh -c 'exec sh < /dev/tty1 >/dev/tty1 2>&1'
|
||
echo
|
||
fi
|
||
}
|
||
|
||
fatal()
|
||
{
|
||
log "FatalError: $@"
|
||
echo_fatal "$@"
|
||
echo_sign "EMERGENCY MODE" >&2
|
||
echo_bold "Please consult /var/log/livekit-log for more info." >&2
|
||
setsid sh -c 'exec sh < /dev/tty1 >/dev/tty1 2>&1'
|
||
}
|
||
|
||
|
||
# test if the script is started by root user. If not, exit
|
||
#
|
||
allow_only_root()
|
||
{
|
||
if [ "0$UID" -ne 0 ]; then
|
||
echo_err "Only root can run $(basename $0)"; exit 1
|
||
fi
|
||
}
|
||
|
||
# Make bundle
|
||
# call mksquashfs with apropriate arguments
|
||
# $1 = directory which will be compressed to squashfs bundle
|
||
# $2 = output file
|
||
# $3..$9 = optional arguments like -keep-as-directory or -b 123456789
|
||
#
|
||
mkbund()
|
||
{
|
||
debug_log "mkbund" "$*"
|
||
|
||
if [ -e "$2" ]; then
|
||
echo_warn "mkbund: `basename $2`: File already exists!"
|
||
echo_warn "mkbund: `basemane $2`: Deleting file..."
|
||
rm -f "$2"
|
||
else
|
||
echo_livekit_msg "mkbund: `basename $2`: Making new bundle..."
|
||
fi
|
||
|
||
echo_livekit_msg "mkbund: SquashFS compression: 1024k - XZ" >&2
|
||
echo_livekit_msg "mkbund: `basename $2`: Compressing bundle..." >&2
|
||
mksquashfs "$1" "$2" -comp xz -b 1024k $3 $4 $5 $6 $7 $8 $9 >/dev/null || \
|
||
(echo_err "mkbund: Failed to make bundle!" && exit 1)
|
||
}
|
||
|
||
# Now, for the Live Kit system-related stuff
|
||
|
||
# get value of kernel cmdline parameter $1
|
||
# $1 = parameter to search for
|
||
#
|
||
cmdline_value()
|
||
{
|
||
cat /proc/cmdline | egrep -o "(^|[[:space:]])$1=[^[:space:]]+" | \
|
||
tr -d " " | cut -d "=" -f 2- | tail -n 1
|
||
}
|
||
|
||
|
||
# Move entire initramfs tree to tmpfs mount.
|
||
# It's a bit tricky but is necessray to enable pivot_root
|
||
# even for initramfs boot image
|
||
#
|
||
transfer_initramfs()
|
||
{
|
||
if [ ! -r /lib/initramfs_escaped ]; then
|
||
echo_livekit >&2
|
||
echo "Switching root from initramfs to tmpfs..." >&2
|
||
SWITCH=/m # one letter directory
|
||
mkdir -p $SWITCH
|
||
mount -t tmpfs -o size="100%" tmpfs $SWITCH
|
||
cp -a /??* $SWITCH 2>/dev/null # only copy two-and-more-letter directories
|
||
cd $SWITCH
|
||
echo "This file indicates that we successfully escaped initramfs" > $SWITCH/lib/initramfs_escaped
|
||
exec switch_root -c /dev/console . $0
|
||
fi
|
||
}
|
||
|
||
# mount virtual filesystems like proc, sys and such
|
||
#
|
||
init_proc_sysfs()
|
||
{
|
||
debug_log "init_proc_sysfs" "$*"
|
||
mkdir -p /proc /sys /etc $MEMORY
|
||
mount -n -t proc proc /proc
|
||
echo "0" >/proc/sys/kernel/printk
|
||
mount -n -t sysfs sysfs /sys
|
||
mount -n -o remount,rw rootfs /
|
||
ln -sf /proc/mounts /etc/mtab
|
||
}
|
||
|
||
|
||
# modprobe all modules found in initial ramdisk
|
||
modprobe_everything()
|
||
{
|
||
debug_log "modprobe_everything" "$*"
|
||
|
||
echo_livekit_msg "Probing for hardware..." >&2
|
||
|
||
find /lib/modules/ | fgrep '.ko' | xargs -n 1 modprobe 2>/dev/null
|
||
refresh_devs
|
||
}
|
||
|
||
|
||
refresh_devs()
|
||
{
|
||
debug_log "refresh_devs" "$*"
|
||
if [ -r /proc/sys/kernel/hotplug ]; then
|
||
echo /sbin/mdev > /proc/sys/kernel/hotplug
|
||
fi
|
||
mdev -s
|
||
}
|
||
|
||
# make sure some devices are there
|
||
init_devs()
|
||
{
|
||
debug_log "init_devs" "$*"
|
||
modprobe zram 2>/dev/null
|
||
modprobe loop 2>/dev/null
|
||
modprobe squashfs 2>/dev/null
|
||
modprobe fuse 2>/dev/null
|
||
refresh_devs
|
||
}
|
||
|
||
# Activate zram (auto-compression of RAM)
|
||
# Compressed RAM consumes 1/2 or even 1/4 of original size
|
||
# Setup static size of 500MB
|
||
#
|
||
init_zram()
|
||
{
|
||
debug_log "init_zram" "$*"
|
||
echo_livekit_msg "Setting up ZRAM as swap if available..."
|
||
if [ -r /sys/block/zram0/disksize ]; then
|
||
echo 536870912 > /sys/block/zram0/disksize # 512MB
|
||
mkswap /dev/zram0 >/dev/null
|
||
swapon /dev/zram0 -p 32767
|
||
echo 100 > /proc/sys/vm/swappiness
|
||
fi
|
||
}
|
||
|
||
# load the AUFS kernel module if needed
|
||
#
|
||
init_aufs()
|
||
{
|
||
debug_log "init_aufs" "$*"
|
||
# TODO maybe check here if aufs support is working at all
|
||
# and produce useful error message if user has no aufs
|
||
modprobe aufs 2>/var/log/livekit-log
|
||
|
||
# TODO ACCOMPLISHED:
|
||
# If aufs module failed to load, panic immidiately
|
||
if [ $? -ne 0 ]; then
|
||
fatal "Failed to load AUFS module!"
|
||
fi
|
||
|
||
# finally, refresh all devices
|
||
refresh_devs
|
||
}
|
||
|
||
# Setup empty union
|
||
# $1 = changes directory (ramfs or persistent changes)
|
||
# $2 = union directory where to mount the union
|
||
#
|
||
init_union()
|
||
{
|
||
debug_log "init_union" "$*"
|
||
|
||
echo_livekit_msg "Initialising AUFS union..."
|
||
mkdir -p "$1"
|
||
mkdir -p "$2"
|
||
mount -t aufs -o xino="/.xino",trunc_xino,br="$1" aufs "$2"
|
||
}
|
||
|
||
# Return device mounted for given directory
|
||
# $1 = directory
|
||
#
|
||
mounted_device()
|
||
{
|
||
debug_log "mounted_device" "$*"
|
||
|
||
local MNT TARGET
|
||
MNT="$1"
|
||
while [ "$MNT" != "/" -a "$MNT" != "." -a "$MNT" != "" ]; do
|
||
TARGET="$(grep -F " $MNT " /proc/mounts | cut -d " " -f 1)"
|
||
if [ "$TARGET" != "" ]; then
|
||
echo "$TARGET"
|
||
return
|
||
fi
|
||
MNT="$(dirname "$MNT")"
|
||
done
|
||
}
|
||
|
||
# Return mounted dir for given directory
|
||
# $1 = directory
|
||
#
|
||
mounted_dir()
|
||
{
|
||
debug_log "mounted_dir" "$*"
|
||
|
||
local MNT
|
||
MNT="$1"
|
||
while [ "$MNT" != "/" -a "$MNT" != "." -a "$MNT" != "" ]; do
|
||
if mountpoint -q "$MNT" 2>/dev/null; then
|
||
echo "$MNT"
|
||
return
|
||
fi
|
||
MNT="$(dirname "$MNT")"
|
||
done
|
||
}
|
||
|
||
# Make sure to mount FAT12/16/32 using vfat
|
||
# in order to support long filenames
|
||
# $1 = device
|
||
#
|
||
device_bestfs()
|
||
{
|
||
debug_log "device_bestfs" "$*"
|
||
local FS
|
||
|
||
FS="$(blkid "$1" | sed -r "s/.*TYPE=//" | tr -d '"' | \
|
||
tr "[A-Z]" "[a-z]" | cut -d ' ' -f 1)"
|
||
if [ "$FS" = "msdos" -o "$FS" = "fat" ]; then
|
||
FS="vfat"
|
||
elif [ "$FS" = "ntfs" ]; then
|
||
FS="ntfs-3g"
|
||
else
|
||
FS="$FS"
|
||
fi
|
||
echo "-t $FS"
|
||
}
|
||
|
||
# Filesystem options for mount
|
||
# $1 = filesystem or '-t filesystem'
|
||
#
|
||
fs_options()
|
||
{
|
||
debug_log "fs_options" "$*"
|
||
|
||
if [ "$1" = "-t" ]; then
|
||
shift
|
||
fi
|
||
if [ "$1" = "vfat" ]; then
|
||
echo "-o check=s,shortname=mixed,iocharset=utf8"
|
||
fi
|
||
}
|
||
|
||
|
||
# Modprobe network kernel modules until a working driver is found.
|
||
# These drivers are (or used to be) probed in Slackware's initrd.
|
||
# The function returns the first device found, yet it doesn't have
|
||
# to be a working one, eg. if the computer has two network interfaces
|
||
# and ethernet cable is plugged only to one of them.
|
||
#
|
||
init_network_dev()
|
||
{
|
||
debug_log "init_network_dev" "$*"
|
||
echo_livekit_msg "Preparing networking device(s)..." >&2
|
||
local MODULE ETH
|
||
|
||
for MODULE in 3c59x acenic de4x5 e1000 e1000e e100 epic100 hp100 \
|
||
ne2k-pci pcnet32 8139too 8139cp tulip via-rhine r8169 atl1e yellowfin \
|
||
tg3 dl2k ns83820 atl1 b44 bnx2 skge sky2 tulip depca 3c501 3c503 \
|
||
3c505 3c507 3c509 3c515 ac3200 at1700 cosa cs89x0 de600 de620 e2100 \
|
||
eepro eexpress eth16i ewrk3 forcedeth hostess_sv11 hp-plus hp ni52 \
|
||
ni65 sb1000 sealevel smc-ultra sis900 smc9194 wd; do
|
||
modprobe $MODULE 2>/dev/null
|
||
ETH="$(cat /proc/net/dev | grep : | grep -v lo: | cut -d : -f 1 | tr -d " " | head -n 1)"
|
||
if [ "$ETH" != "" ]; then
|
||
echo $ETH
|
||
return 0
|
||
fi
|
||
rmmod $MODULE 2>/dev/null
|
||
done
|
||
|
||
# If we are here, none of the above specified modules worked.
|
||
# As a last chance, try to modprobe everything.
|
||
echo_warn "No networking kernel module found!"
|
||
modprobe_everything
|
||
cat /proc/net/dev | grep : | grep -v lo: | cut -d : -f 1 | tr -d " " | head -n 1
|
||
}
|
||
|
||
|
||
# Download data from tftp
|
||
# $1 = target (store downloaded files there)
|
||
#
|
||
download_data_pxe()
|
||
{
|
||
debug_log "download_data_pxe" "$*"
|
||
local CMD CLIENT SERVER GW MASK PORT ETH PROTOCOL
|
||
|
||
mkdir -p "$1/$LIVEKITNAME"
|
||
|
||
cmdline_value ip | while IFS=":" read CLIENT SERVER GW MASK PORT; do
|
||
echo_livekit_msg "Downloading files from $SERVER ..." >&2
|
||
|
||
ETH=$(init_network_dev)
|
||
if [ "$PORT" = "" ]; then PORT="7529"; fi
|
||
|
||
# set IP address as given by boot paramter
|
||
if [ "$CLIENT" != "" -a "$MASK" != "" ]; then
|
||
ifconfig $ETH "$CLIENT" netmask "$MASK"
|
||
route add default gw "$GW"
|
||
else
|
||
# if client ip is unknown, try to get a DHCP lease
|
||
udhcpc -i $ETH -f -q
|
||
fi
|
||
|
||
# well known IP address of Google public DNS service
|
||
echo nameserver 8.8.8.8 >> /etc/resolv.conf
|
||
|
||
PROTOCOL=http
|
||
wget -q -O "$1/PXEFILELIST" "http://$SERVER:$PORT/PXEFILELIST?$(uname -r):$(uname -m)"
|
||
if [ $? -ne 0 ]; then
|
||
echo_warn "Failed to download from http://$SERVER:$PORT, trying TFTP..."
|
||
PROTOCOL=tftp
|
||
tftp -g -r PXEFILELIST -l "$1/PXEFILELIST" $SERVER
|
||
fi
|
||
|
||
cat "$1/PXEFILELIST" | while read FILE; do
|
||
if [ "$PROTOCOL" = "http" ]; then
|
||
wget -O "$1/$LIVEKITNAME/$FILE" "http://$SERVER:$PORT/$FILE"
|
||
else
|
||
echo_livekit_msg "PXE: ${FILE}..." >&2
|
||
tftp -g -r $FILE -l "$1/$LIVEKITNAME/$FILE" $SERVER
|
||
fi
|
||
done
|
||
done
|
||
|
||
echo "$1/$LIVEKITNAME"
|
||
}
|
||
|
||
# Find LIVEKIT data by mounting all devices
|
||
# If found, keep mounted, else unmount
|
||
# $1 = data directory target (mount here)
|
||
# $2 = data directory which contains compressed bundles
|
||
#
|
||
find_data_try()
|
||
{
|
||
debug_log "find_data_try" "$*"
|
||
|
||
local DEVICE FS FROM OPTIONS
|
||
|
||
mkdir -p "$1"
|
||
blkid | sort | cut -d: -f 1 | grep -E -v "/loop|/ram|/zram" | while read DEVICE; do
|
||
FROM="$2"
|
||
FS="$(device_bestfs "$DEVICE")"
|
||
OPTIONS="$(fs_options $FS)"
|
||
mount -r "$DEVICE" "$1" $FS $OPTIONS 2>/dev/null
|
||
|
||
# if the FROM parameter is actual file, mount it again as loop (eg. iso)
|
||
if [ -f "$1/$FROM" ]; then
|
||
mount -o remount,rw "$DEVICE" "$1" 2>/dev/null
|
||
mkdir -p "$1/../file"
|
||
mount -o loop,ro "$1/$FROM" "$1/../file" 2>/dev/null
|
||
FROM="../file/$LIVEKITNAME"
|
||
fi
|
||
|
||
# search for bundles in the mounted directory
|
||
if [ "$(find "$1/$FROM" -maxdepth 1 -name "*.$BEXT" 2>/dev/null)" != "" ]; then
|
||
# we found at least one bundle/module here
|
||
mount -o remount,rw "$DEVICE" "$1" 2>/dev/null
|
||
echo "$1/$FROM" | tr -s "/" | sed -r "s:/[^/]+/[.][.]/:/:g"
|
||
return
|
||
fi
|
||
|
||
# unmount twice, since there could be mounted ISO as loop too. If not, it doesn't hurt
|
||
umount "$1" 2>/dev/null
|
||
umount "$1" 2>/dev/null
|
||
done
|
||
}
|
||
|
||
# Retry finding LIVEKIT data several times,
|
||
# until timeouted or until data is found
|
||
# $1 = timeout
|
||
# $2 = data directory target (mount here)
|
||
#
|
||
find_data()
|
||
{
|
||
debug_log "find_data" "$*"
|
||
|
||
local DATA FROM
|
||
|
||
if [ "$(cmdline_value ip)" != "" ]; then
|
||
download_data_pxe "$2"
|
||
return
|
||
fi
|
||
|
||
FROM="$(cmdline_value from)"
|
||
if [ "$FROM" = "" ]; then FROM="$LIVEKITNAME"; fi
|
||
echo_livekit >&2
|
||
echo "Looking for $LIVEKITNAME data in /$FROM .." | tr -s "/" >&2
|
||
for timeout in $(seq 1 $1); do
|
||
echo -n "." >&2
|
||
refresh_devs
|
||
DATA="$(find_data_try "$2" "$FROM")"
|
||
echo "" >&2
|
||
if [ "$DATA" != "" ]; then
|
||
echo_livekit_msg "$LIVEKITNAME data found on $(mounted_device "$2")" >&2
|
||
echo "$DATA"
|
||
return
|
||
fi
|
||
sleep 1
|
||
done
|
||
echo "" >&2
|
||
|
||
if [ "$DATA" = "" ]; then
|
||
fatal "$LIVEKITNAME data not found"
|
||
fi
|
||
|
||
}
|
||
|
||
# Activate persistent changes
|
||
# $1 = data directory
|
||
# $2 = target changes directory
|
||
#
|
||
persistent_changes()
|
||
{
|
||
debug_log "persistent_changes" "$*"
|
||
|
||
local CHANGES T1 T2
|
||
|
||
CHANGES="$1/$(basename "$2")"
|
||
T1="$CHANGES/.perch-test.dat"
|
||
T2="${T1}-clone.dat"
|
||
|
||
# Setup the directory anyway, it will be used in all cases
|
||
mkdir -p "$2"
|
||
|
||
# If persistent changes are not requested, end here
|
||
if grep -vq 'perch' /proc/cmdline; then
|
||
return
|
||
fi
|
||
|
||
# check if changes directory exists and is writable
|
||
touch "$T1" 2>/dev/null && rm -f "$T1" 2>/dev/null
|
||
|
||
# if not, simply return back
|
||
if [ $? -ne 0 ]; then
|
||
echo_warn "Persistent changes not writable or not used."
|
||
return
|
||
fi
|
||
echo_livekit_msg "Testing persistent changes for POSIX compatibility..." >&2
|
||
touch "$T1" && ln -sf "$T1" "$T2" 2>/dev/null && \
|
||
chmod +x "$T1" 2>/dev/null && test -x "$T1" && \
|
||
chmod -x "$T1" 2>/dev/null && test ! -x "$T1" && \
|
||
rm "$T1" "$T2" 2>/dev/null
|
||
|
||
if [ $? -ne 0 ]; then
|
||
echo_warn "File system is not POSIX-compatible!" >&2
|
||
echo_livekit_msg "Activating DynFileFS persistent changes..." >&2
|
||
rm "$T1" "$T2" 2>/dev/null
|
||
|
||
mount.dynfilefs "$CHANGES/changes.dat" 4000 "$2"
|
||
if [ "$(device_bestfs "$2/loop.fs" | tr -d " ")" = "-t" ]; then
|
||
mke2fs -F "$2/loop.fs" >/dev/null
|
||
fi
|
||
mount -o loop,sync "$2/loop.fs" "$2"
|
||
rmdir "$2/lost+found" 2>/dev/null
|
||
else
|
||
echo_livekit_msg "Activating native persistent changes..." >&2
|
||
mount --bind "$CHANGES" "$2"
|
||
fi
|
||
}
|
||
|
||
# Copy content of rootcopy directory to union
|
||
# $1 = data directory
|
||
# $2 = union directory
|
||
copy_rootcopy_content()
|
||
{
|
||
debug_log "copy_rootcopy_content" "$*"
|
||
|
||
if [ "$(ls -1 "$1/rootcopy/" 2>/dev/null)" != "" ]; then
|
||
echo_livekit
|
||
echo "Copying content of rootcopy directory..."
|
||
cp -a "$1"/rootcopy/* "$2"
|
||
fi
|
||
}
|
||
|
||
# Copy data to RAM if requested
|
||
# $1 = live data directory
|
||
# $2 = changes directory
|
||
#
|
||
copy_to_ram()
|
||
{
|
||
debug_log "copy_to_ram" "$*"
|
||
|
||
local MDIR MDEV RAM CHANGES
|
||
|
||
if grep -vq 'copy2ram' /proc/cmdline; then
|
||
echo "$1"
|
||
return
|
||
fi
|
||
|
||
echo_livekit_msg "Copying $LIVEKITNAME data to RAM..." >&2
|
||
RAM="$(dirname "$2")"/copy_to_ram
|
||
mkdir -p "$RAM"
|
||
cp -a "$1"/* "$RAM"
|
||
echo "$RAM"
|
||
|
||
MDIR="$(mounted_dir "$1")"
|
||
MDEV="$(mounted_device "$1")"
|
||
MDEV="$(losetup $MDEV 2>/dev/null | cut -d " " -f 3)"
|
||
umount "$MDIR" 2>/dev/null
|
||
|
||
if [ "$MDEV" ]; then # iso was mounted here, try to unmount the FS it resides on too
|
||
MDEV="$(mounted_device "$MDEV")"
|
||
umount "$MDEV" 2>/dev/null
|
||
fi
|
||
}
|
||
|
||
# load filter
|
||
#
|
||
filter_load()
|
||
{
|
||
local FILTER
|
||
FILTER=$(cmdline_value load)
|
||
if [ "$FILTER" = "" ]; then
|
||
cat -
|
||
else
|
||
cat - | egrep "$FILTER"
|
||
fi
|
||
}
|
||
|
||
# noload filter
|
||
#
|
||
filter_noload()
|
||
{
|
||
local FILTER
|
||
FILTER=$(cmdline_value noload)
|
||
if [ "$FILTER" = "" ]; then
|
||
cat -
|
||
else
|
||
cat - | egrep -v "$FILTER"
|
||
fi
|
||
}
|
||
|
||
# sort modules by number even if they are in subdirectory
|
||
#
|
||
sortmod()
|
||
{
|
||
cat - | sed -r "s,(.*/(.*)),\\2:\\1," | sort -n | cut -d : -f 2-
|
||
}
|
||
|
||
# Mount squashfs filesystem bundles
|
||
# and add them to union
|
||
# $1 = directory where to search for bundles
|
||
# $2 = directory where to mount bundles
|
||
# $3 = directory where union is mounted
|
||
#
|
||
union_append_bundles()
|
||
{
|
||
debug_log "union_append_bundles" "$*"
|
||
|
||
local BUN
|
||
|
||
echo_livekit >&2
|
||
echo "Appending bundles to union..." >&2
|
||
|
||
# Just tell me why! Why be compact?!?
|
||
( ls -1 "$1" | sort -n ; cd "$1" ; find modules/ 2>/dev/null | \
|
||
sortmod | filter_load) | grep '[.]'$BEXT'$' |\
|
||
filter_noload | \
|
||
while read BUNDLE; do
|
||
echo_livekit_msg "Appending: $BUNDLE" >&2
|
||
|
||
BUN="$(basename "$BUNDLE")"
|
||
mkdir -p "$2/$BUN"
|
||
|
||
# It now depends on your kernel!
|
||
mount -o loop -t squashfs "$1/$BUNDLE" "$2/$BUN"
|
||
mount -o remount,add:1:"$2/$BUN" aufs "$3"
|
||
done
|
||
}
|
||
|
||
# Create empty fstab properly
|
||
# $1 = root directory
|
||
#
|
||
fstab_create()
|
||
{
|
||
debug_log "fstab_create" "$*"
|
||
|
||
local FSTAB
|
||
FSTAB="$1/etc/fstab"
|
||
echo aufs / aufs defaults 0 0 > $FSTAB
|
||
echo proc /proc proc defaults 0 0 >> $FSTAB
|
||
echo sysfs /sys sysfs defaults 0 0 >> $FSTAB
|
||
echo devpts /dev/pts devpts gid=5,mode=620 0 0 >> $FSTAB
|
||
echo tmpfs /dev/shm tmpfs defaults 0 0 >> $FSTAB
|
||
}
|
||
|
||
|
||
# Change root and execute init
|
||
# $1 = where to change root
|
||
#
|
||
change_root()
|
||
{
|
||
debug_log "change_root" "$*"
|
||
echo_livekit_msg "Changing root..." >&2
|
||
umount /proc
|
||
umount /sys
|
||
|
||
cd "$1"
|
||
|
||
# make sure important device files and directories are in union
|
||
mkdir -p boot dev proc sys tmp mnt run
|
||
chmod 1777 tmp
|
||
if [ ! -e dev/console ]; then mknod dev/console c 5 1; fi
|
||
if [ ! -e dev/tty ]; then mknod dev/tty c 5 0; fi
|
||
if [ ! -e dev/tty0 ]; then mknod dev/tty0 c 4 0; fi
|
||
if [ ! -e dev/tty1 ]; then mknod dev/tty1 c 4 1; fi
|
||
if [ ! -e dev/null ]; then mknod dev/null c 1 3; fi
|
||
if [ ! -e sbin/fsck.aufs ]; then ln -s /bin/true sbin/fsck.aufs; fi
|
||
|
||
# find chroot and init
|
||
if [ -x bin/chroot -o -L bin/chroot ]; then CHROOT=bin/chroot; fi
|
||
if [ -x sbin/chroot -o -L sbin/chroot ]; then CHROOT=sbin/chroot; fi
|
||
if [ -x usr/bin/chroot -o -L usr/bin/chroot ]; then CHROOT=usr/bin/chroot; fi
|
||
if [ -x usr/sbin/chroot -o -L usr/sbin/chroot ]; then CHROOT=usr/sbin/chroot; fi
|
||
if [ "$CHROOT" = "" ]; then fatal "chroot: Executable not found!"; fi
|
||
|
||
if [ -x bin/init -o -L bin/init ]; then INIT=bin/init; fi
|
||
if [ -x sbin/init -o -L sbin/init ]; then INIT=sbin/init; fi
|
||
if [ "$INIT" = "" ]; then fatal "init: Executable not found!"; fi
|
||
|
||
mkdir -p mnt/live
|
||
mount -n -o remount,ro aufs .
|
||
pivot_root . mnt/live
|
||
exec $CHROOT . $INIT < dev/console > dev/console 2>&1
|
||
}
|