#!/bin/ash
#
# Copyright 2004 Slackware Linux, Inc., Concord, CA, USA
# Copyright 2007, 2008, 2009, 2010, 2012 Patrick J. Volkerding, Sebeka, MN, USA
# Copyright 2015 Eric Hameleers, Eindhoven, NL
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
##################################################################################
# Changelog
# 10-Dec-2012 <mozes@slackware.com>
# * Added support for the official Kernel parameters to select root filesystem
# type ('rootfstype') and pause before attempting to mount the root filesystem
# ('rootdelay'). The original parameters may continue to be used.
# 23-Oct-2015 <alien@slackware.com>
# * Modified for booting as a Live filesystem.
##################################################################################
# The ISO creation script will create a filesystem with this label.
# Nevertheless, the user may have copied the ISO content to a different device.
MEDIALABEL="@MEDIALABEL@"
LIVEMAIN="@LIVEMAIN@"
# By default, let the media determine if we can write persistent changes:
VIRGIN=0
INITRD=$(cat /initrd-name)
WAIT=$(cat /wait-for-root)
KEYMAP=$(cat /keymap)
INIT=/sbin/init
PATH="/sbin:/bin:/usr/sbin:/usr/bin"
# Mount /proc and /sys:
mount -n proc /proc -t proc
mount -n sysfs /sys -t sysfs
mount -n tmpfs /run -t tmpfs -o mode=0755
if grep devtmpfs /proc/filesystems 1>/dev/null 2>/dev/null ; then
DEVTMPFS=1
mount -n devtmpfs /dev -t devtmpfs
fi
# Parse command line
for ARG in $(cat /proc/cmdline); do
case $ARG in
0|1|2|3|4|5|6|S|s|single)
RUNLEVEL=$ARG
;;
hostname=*)
LIVE_HOSTNAME=$(echo $ARG | cut -f2 -d=)
;;
init=*)
INIT=$(echo $ARG | cut -f2 -d=)
;;
kbd=*)
KEYMAP=$(echo $ARG | cut -f2 -d=)
;;
livepw=*)
LIVEPW=$(echo $ARG | cut -f2 -d=)
;;
load=*)
LOAD=$(echo $ARG | cut -f2 -d=)
;;
noload=*)
NOLOAD=$(echo $ARG | cut -f2 -d=)
;;
locale=*)
LOCALE=$(echo $ARG | cut -f2 -d=)
;;
nop)
VIRGIN=1
;;
rescue)
RESCUE=1
;;
swap)
USE_SWAP=1
;;
rootpw=*)
ROOTPW=$(echo $ARG | cut -f2 -d=)
;;
tz=*)
TZ=$(echo $ARG | cut -f2 -d=)
;;
waitforroot=*|rootdelay=*)
WAIT=$(echo $ARG | cut -f2 -d=)
;;
esac
done
# If udevd is available, use it to generate block devices
# else use mdev to read sysfs and generate the needed devices
if [ -x /sbin/udevd -a -x /sbin/udevadm ]; then
/sbin/udevd --daemon --resolve-names=never
/sbin/udevadm trigger --subsystem-match=block --action=add
/sbin/udevadm settle --timeout=10
else
[ "$DEVTMPFS" != "1" ] && mdev -s
fi
# Load kernel modules (ideally this was already done by udev):
if [ ! -d /lib/modules/$(uname -r) ]; then
echo "No kernel modules found for Linux $(uname -r)."
elif [ -x ./load_kernel_modules ]; then # use load_kernel_modules script:
echo "${INITRD}: Loading kernel modules from initrd image:"
. ./load_kernel_modules 1>/dev/null 2>/dev/null
else # load modules (if any) in order:
if ls /lib/modules/$(uname -r)/*.*o 1> /dev/null 2> /dev/null ; then
echo "${INITRD}: Loading kernel modules from initrd image:"
for module in /lib/modules/$(uname -r)/*.*o ; do
/sbin/modprobe $module 1>/dev/null 2>/dev/null
done
unset module
fi
fi
# Sometimes the devices need extra time to be available.
# A root filesystem on USB is a good example of that.
sleep $WAIT
# Fire at least one blkid:
blkid 1>/dev/null 2>/dev/null
# Load a custom keyboard mapping:
if [ -n "$KEYMAP" ]; then
echo "${INITRD}: Loading '$KEYMAP' keyboard mapping:"
tar xzOf /etc/keymaps.tar.gz ${KEYMAP}.bmap | loadkmap
fi
if [ "$RESCUE" = "" ]; then
# Initialize RAID:
if [ -x /sbin/mdadm ]; then
# If /etc/mdadm.conf is present, udev should DTRT on its own;
# If not, we'll make one and go from there:
if [ ! -r /etc/mdadm.conf ]; then
/sbin/mdadm -E -s >/etc/mdadm.conf
/sbin/mdadm -S -s
/sbin/mdadm -A -s
# This seems to make the kernel see partitions more reliably:
fdisk -l /dev/md* 1> /dev/null 2> /dev/null
fi
fi
# Scan for btrfs multi-device filesystems:
if [ -x /sbin/btrfs ]; then
/sbin/btrfs device scan
fi
# --------------------------------------------------------------------- #
# SLACKWARE LIVE - START #
# --------------------------------------------------------------------- #
# We need a mounted filesystem here to be able to do a switch_root later,
# so we create one in RAM:
mount -t tmpfs -o defaults none /mnt
# Find the Slackware Live media.
# We iterate a maximum of 10 times to give USB devices a chance to be seen
# by the kernel. Set the WAIT variable to increase the iterations.
mkdir /mnt/media
for ITER in $(seq 1 ${WAIT:-10}); do
# Filter out the block devices, only look at partitions at first:
LIVEMEDIA=$(blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep "[0-9]$")
if [ ! -z "$LIVEMEDIA" ]; then
# That was easy... we found the media straight away.
# Determine filesystem type ('iso9660' means we found a CDROM/DVD)
LIVEFS=$(blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t auto -o ro $LIVEMEDIA /mnt/media
else
LIVEMEDIA=$(blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep -v "[0-9]$")
if [ ! -z "$LIVEMEDIA" ]; then
# We found a block device with the correct label (non-UEFI media).
# Determine filesystem type ('iso9660' means we found a CDROM/DVD)
LIVEFS=$(blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t auto -o ro $LIVEMEDIA /mnt/media
else
# Bummer... label not found; the ISO was extracted to a different device.
# Separate partitions from block devices, look at partitions first:
for SLDEVICE in $(blkid |cut -d: -f1 |grep "[0-9]$") $(blkid |cut -d: -f1 |grep -v "[0-9]$") ; do
mount -t auto -o ro $SLDEVICE /mnt/media
if [ -d /mnt/media/${LIVEMAIN} ]; then
# Found our media!
LIVEMEDIA=$SLDEVICE
LIVEFS=$(blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
break
else
umount $SLDEVICE
unset SLDEVICE
fi
done
fi
fi
if [ -n "$LIVEMEDIA" ]; then
# Gotcha!
break
fi
sleep 1
done
if [ ! -z "$LIVEMEDIA" ]; then
echo "${INITRD}: Live media found at ${LIVEMEDIA}."
else
echo "${INITRD}: No live media found... trouble ahead."
echo "${INITRD}: Try adding \"rootdelay=20\" to the boot command."
fi
# Start assembling our live system components below /mnt/live :
mkdir /mnt/live
# Mount our squashed modules (.sxz extension).
mkdir /mnt/live/modules
# Modules were created in specific order and will be mounted in that order.
# In the lowerdirs parameter for the overlay, the module with the highest
# number (i.e. created last) will be leftmost in a colon-separated list:
RODIRS=""
# First, the base Slackware system components:
for MODLOC in $(ls -1 /mnt/media/${LIVEMAIN}/system/*.sxz) ; do
MODBASE="$(basename ${MODLOC} .sxz)"
mkdir /mnt/live/modules/${MODBASE}
mount -t squashfs -o loop ${MODLOC} /mnt/live/modules/${MODBASE}
RODIRS=":/mnt/live/modules/${MODBASE}${RODIRS}"
done
# Next, the add-on (3rd party etc) components, if any:
# Remember, module name must adhere to convention: "NNNN-modname-*.sxz"
# where 'N' is a digit and 'modname' must not contain a dash '-'.
if ls /mnt/media/${LIVEMAIN}/addons/*.sxz 1>/dev/null 2>/dev/null ; then
for MODLOC in /mnt/media/${LIVEMAIN}/addons/*.sxz ; do
MODBASE="$(basename $MODLOC .sxz)"
# Skip loading one or more addons by using boot parameter 'noload':
# noload=mod1[,mod2[,mod3]]
if [ -n "$NOLOAD" -a -n '$(echo ",${NOLOAD}," |grep -i ",$(echo $MODBASE |cut -d- -f2),")' ]; then
echo "$MODBASE" >> /mnt/live/modules/skipped
else
mkdir /mnt/live/modules/${MODBASE}
mount -t squashfs -o loop ${MODLOC} /mnt/live/modules/${MODBASE}
RODIRS=":/mnt/live/modules/${MODBASE}${RODIRS}"
fi
done
fi
# And finally any explicitly requested optionals (like nvidia drivers):
# Remember, module name must adhere to convention: "NNNN-modname-*.sxz"
# where 'N' is a digit and 'modname' must not contain a dash '-'.
if ls /mnt/media/${LIVEMAIN}/optional/*.sxz 1>/dev/null 2>/dev/null ; then
for MODLOC in /mnt/media/${LIVEMAIN}/optional/*.sxz ; do
MODBASE="$(basename $MODLOC .sxz)"
if [ -n "$LOAD" -a -n '$(echo ",${LOAD}," |grep -i ",$(echo $MODBASE |cut -d- -f2),")' ]; then
mkdir /mnt/live/modules/${MODBASE}
mount -t squashfs -o loop ${MODLOC} /mnt/live/modules/${MODBASE}
RODIRS=":/mnt/live/modules/${MODBASE}${RODIRS}"
fi
done
fi
# Get rid of the starting colon:
RODIRS=$(echo $RODIRS |cut -c2-)
# Setup persistency in case our media is writable, *and* the user
# has created a directory "persistence" in the root of the media.
# otherwise we let the block changes accumulate in RAM only.
# Create the mount point for the writable upper directory of the overlay:
# Assume the default to be a readonly media - we write to RAM:
UPPERDIR=/mnt/live/changes
OVLWORK=/mnt/live/.ovlwork
if [ "$VIRGIN" = "0" ]; then
if [ "LIVEFS" != "iso9660" -a -d /mnt/media/persistence ]; then
# Looks OK, but we need to remount the media in order to write to it:
mount -o remount,rw /mnt/media
# Try a write... just to be dead sure:
if touch /mnt/media/persistence/.rwtest 2>/dev/null && rm /mnt/media/persistence/.rwtest 2>/dev/null ; then
# Writable media and we are allowed to write to it.
echo "${INITRD}: Writing persistent changes to media directory '/persistence'."
UPPERDIR=/mnt/media/persistence
OVLWORK=/mnt/media/.ovlwork
fi
fi
fi
# Create the writable upper directory, plus the workdir which is required
# for overlay to function (the two must be in the same POSIX filesystem):
mkdir -p ${UPPERDIR}
mkdir -p ${OVLWORK}
# Create the overlay of readonly and writable directories:
mkdir -p /mnt/overlay
mount -t overlay -o workdir=${OVLWORK},upperdir=${UPPERDIR},lowerdir=${RODIRS} overlay /mnt/overlay
# Make the underpinning RAM fs accessible in the live system (for fun):
mkdir -p /mnt/overlay/mnt/live
mount --bind /mnt/live /mnt/overlay/mnt/live
# Same for the Linux filesystem on the USB stick:
mkdir -p /mnt/overlay/mnt/livemedia
mount --bind /mnt/media /mnt/overlay/mnt/livemedia
if [ ! -z "$USE_SWAP" ]; then
# Use any available swap device:
for SWAPD in $(blkid |grep TYPE="\"swap\"" |cut -d: -f1) ; do
echo "${INITRD}: Enabling swapping to '$SWAPD'"
echo "$SWAPD swap swap defaults 0 0" >> /mnt/overlay/etc/fstab
done
fi
if [ ! -z "$KEYMAP" ]; then
# Configure custom keyboard mapping in console and X:
echo "${INITRD}: Switching live desktop to '$KEYMAP' keyboard"
cat <<EOT > /mnt/overlay/etc/rc.d/rc.keymap
#!/bin/sh
# Load the keyboard map. More maps are in /usr/share/kbd/keymaps.
if [ -x /usr/bin/loadkeys ]; then
/usr/bin/loadkeys ${KEYMAP}
fi
EOT
chmod 755 /mnt/overlay/etc/rc.d/rc.keymap
# Set a usable keyboard mapping in X.Org, derived from the console map:
mkdir -p /mnt/overlay/etc/X11/xorg.conf.d
cat <<EOT > /mnt/overlay/etc/X11/xorg.conf.d/30-keyboard.conf
Section "InputClass"
Identifier "keyboard-all"
Driver "evdev"
Option "XkbLayout" "$(echo $KEYMAP |cut -c1-2)"
MatchIsKeyboard "on"
EndSection
EOT
fi
if [ ! -z "$LOCALE" ]; then
# Configure custom locale:
echo "${INITRD}: Switching to '$LOCALE' locale"
sed -i -e "s/^ *export LANG=.*/export LANG=${LOCALE}/" /mnt/overlay/etc/profile.d/lang.sh
fi
if [ ! -z "$TZ" -a -f /mnt/overlay/usr/share/zoneinfo/${TZ} ]; then
# Configure custom timezone:
echo "${INITRD}: Configuring timezone '$TZ'"
cp /mnt/overlay/usr/share/zoneinfo/${TZ} /mnt/overlay/etc/localtime
cp /mnt/overlay/usr/share/zoneinfo/${TZ} /mnt/overlay/etc/localtime
rm /mnt/overlay/etc/localtime-copied-from
ln -s /usr/share/zoneinfo/${TZ} /mnt/overlay/etc/localtime-copied-from
# Configure the hardware clock to be interpreted as localtime and not UTC:
cat <<EOT > /mnt/overlay/etc/hardwareclock
# /etc/hardwareclock
#
# Tells how the hardware clock time is stored.
# You should run timeconfig to edit this file.
localtime
EOT
fi
if [ ! -z "$LIVEPW" ]; then
# User entered a custom live password on the boot commandline:
echo "${INITRD}: Changing password for user 'live'."
chroot /mnt/overlay /usr/sbin/chpasswd <<EOPW
live:${LIVEPW}
EOPW
fi
if [ ! -z "$ROOTPW" ]; then
# User entered a custom root password on the boot commandline:
echo "${INITRD}: Changing password for user 'root'."
chroot /mnt/overlay /usr/sbin/chpasswd <<EOPW
root:${ROOTPW}
EOPW
fi
if [ ! -z "$LIVE_HOSTNAME" ]; then
# User entered a custom hostname on the boot commandline:
echo "${INITRD}: Changing hostname to '$LIVE_HOSTNAME'."
echo "${LIVE_HOSTNAME}.example.net" > /mnt/overlay/etc/HOSTNAME
if [ -f /mnt/overlay/etc/NetworkManager/NetworkManager.conf ]; then
sed -i -e "s/^hostname=.*/hostname=${LIVE_HOSTNAME}/" \
/mnt/overlay/etc/NetworkManager/NetworkManager.conf
fi
sed -i -e "s/^\(127.0.0.1\t*\)@DARKSTAR@.*/\1${LIVE_HOSTNAME}.example.net ${LIVE_HOSTNAME}/" /mnt/overlay/etc/hosts
fi
# Copy contents of rootcopy directory (may be empty) to overlay:
cp -af /mnt/media/${LIVEMAIN}/rootcopy/* /mnt/overlay/ 2>/dev/null
# --------------------------------------------------------------------- #
# SLACKWARE LIVE - !END! #
# --------------------------------------------------------------------- #
# Minimal changes to the original Slackware init follow:
# Switch to real root partition:
/sbin/udevadm settle --timeout=10
echo 0x0100 > /proc/sys/kernel/real-root-dev
if [ ! -r /mnt/overlay/${INIT} ]; then
echo "ERROR: No ${INIT} found on rootdev (or not mounted). Trouble ahead."
echo " You can try to fix it. Type 'exit' when things are done."
echo
/bin/sh
fi
else
echo
echo "RESCUE mode"
echo
echo " You can try to fix or rescue your system now. If you want"
echo " to boot into your fixed system, mount your root filesystem"
echo " read-only under /mnt:"
echo
echo " # mount -o ro -t filesystem root_device /mnt"
echo
echo " Type 'exit' when things are done."
echo
/bin/sh
fi
# Need to make sure OPTIONS+="db_persist" exists for all dm devices
# That should be handled in /sbin/mkinitrd now
/sbin/udevadm info --cleanup-db
/sbin/udevadm control --exit
unset ERR
umount /proc
umount /sys
umount /run
# We disable the filesystem checking code in /etc/rc.d/rc.S,
# so we need to keep the fs writable here.
#mount -o ro,remount /mnt/overlay 2>/dev/null
echo "${INITRD}: Slackware Live system is ready."
echo "${INITRD}: exiting"
exec switch_root /mnt/overlay $INIT $RUNLEVEL
