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liveinit.tpl
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#!/bin/ash
#
# Copyright 2004 Slackware Linux, Inc., Concord, CA, USA
# Copyright 2007, 2008, 2009, 2010, 2012 Patrick J. Volkerding, Sebeka, MN, USA
# Copyright 2015, 2016, 2017, 2018 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 <[email protected]>
# * 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 <[email protected]>
# * 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@"
MARKER="@MARKER@"
PERSISTENCE="@PERSISTENCE@"
DISTRO="@DISTRO@"
CDISTRO="@CDISTRO@"
VERSION="@VERSION@"
LIVEUID="@LIVEUID@"
LIVEMEDIA=""
LIVEPATH=""
DISTROCFG="@DISTRO@_os.cfg"
CFGACTION=""
# What extensions do we support for squashfs modules?
SQ_EXT_AVAIL="@SQ_EXT_AVAIL@"
# Defaults for keyboard, language and timezone:
DEF_KBD=@DEF_KBD@
DEF_LOCALE=@DEF_LOCALE@
DEF_TZ=@DEF_TZ@
# By default, let the media determine if we can write persistent changes:
# However, if we define TORAM=1, we will also set VIRGIN=1 since we want
# to avoid anything that writes to disk after we copy the OS to RAM.
VIRGIN=0
# If set to '1', existing persistent data will be wiped:
WIPE_PERSISTENCE=0
# Used for debugging the init;
# Set DEBUG to '1' to enable explicit pauses; '2' enables verbose script exec;
# and '4' dumps you into a debug shell right before the switch_root:
DEBUG=0
DEBUGV=" "
# Masochists can copy the live environment into RAM:
TORAM=0
# The default number of loop devices the Live OS will use (if you have
# a large number of addon modules, this value may be too low).
# Can be changed by the 'maxloops=' boot parameter:
MAXLOOPS=96
# By default we do not touch local hard disks (raid, lvm, btrfs):
LOCALHD=0
# Usability tweaks:
TWEAKS=""
# Deal with freetype's sub-pixel hinting.
# Enable the new v40 interpreter only if /etc/profile.d/freetype.sh is found.
# Otherwise (or in case 'tweaks=nsh' is passed at boot) disable the new
# interpreter and fall back to the old v35 interpreter.
SPH=1
# Perhaps we need to blacklist some kernel module(s):
BLACKLIST=""
# NFS root support:
HNMAC=""
HNMAC_ALLOWED="YES"
INTERFACE=""
NFSHOST=""
# Max wait time for DHCP client to configure an interface:
DHCPWAIT=20
INITRD=$(cat /initrd-name)
WAIT=$(cat /wait-for-root)
KEYMAP=$(cat /keymap)
LUKSVOL=$(cat /luksdev)
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
;;
blacklist=*)
BLACKLIST=$(echo $ARG | cut -f2 -d=)
;;
debug)
DEBUG=1
;;
debug=*)
DEBUG=$(echo $ARG | cut -f2 -d=)
DEBUGV="-v"
;;
dhcpwait=*)
DHCPWAIT=$(echo $ARG | cut -f2 -d=)
;;
hostname=*)
# generic syntax: hostname=newname[,qualifier]
LIVE_HOSTNAME=$(echo $ARG | cut -f2 -d= | cut -f1 -d,)
if [ "$(echo $ARG | cut -f2 -d= | cut -f2 -d,)" = "fixed" ]; then
Keep hostname fixed i.e. never add a MAC address suffix:
HNMAC_ALLOWED="NO"
fi
;;
init=*)
INIT=$(echo $ARG | cut -f2 -d=)
;;
kbd=*)
KEYMAP=$(echo $ARG | cut -f2 -d=)
;;
kill)
KILLPART=1
;;
livemain=*)
LIVEMAIN=$(echo $ARG | cut -f2 -d=)
;;
livemedia=*)
# generic syntax: livemedia=/dev/sdX
# ISO syntax: livemedia=/dev/sdX:/path/to/slackwarelive.iso
LM=$(echo $ARG | cut -f2 -d=)
LIVEMEDIA=$(echo $LM | cut -f1 -d:)
LIVEPATH=$(echo $LM | cut -f2 -d:)
unset LM
;;
livepw=*)
LIVEPW=$(echo $ARG | cut -f2 -d=)
;;
load=*)
LOAD=$(echo $ARG | cut -f2 -d=)
;;
locale=*)
LOCALE=$(echo $ARG | cut -f2 -d=)
;;
localhd)
LOCALHD=1
;;
luksvol=*)
# Format: luksvol=file1[:/mountpoint1][,file1[:/mountpoint2],...]
LUKSVOL=$(echo $ARG | cut -f2 -d=)
;;
maxloops=*)
MAXLOOPS=$(echo $ARG | cut -f2 -d=)
;;
nfsroot=*)
# nfsroot=192.168.0.1:/path/to/liveslak
NFSHOST=$(echo $ARG | cut -f2 -d= |cut -f1 -d:)
NFSPATH=$(echo $ARG | cut -f2 -d= |cut -f2 -d:)
;;
nic=*)
# nic=<driver>:<interface>:<dhcp|static>[:ipaddr:netmask[:gateway]]
ENET=$(echo $ARG | cut -f2 -d=)
;;
cfg=*)
CFGACTION=$(echo $ARG | cut -f2 -d=)
if [ "${CFGACTION}" = "skip" ]; then DISTROCFG="" ; fi
;;
noload=*)
NOLOAD=$(echo $ARG | cut -f2 -d=)
;;
nop)
VIRGIN=1
;;
nop=*)
if [ "$(echo $ARG | cut -f2 -d=)" = "wipe" ]; then
WIPE_PERSISTENCE=1
fi
;;
persistence=*)
PERSISTENCE=$(echo $ARG | cut -f2 -d=)
;;
rescue)
RESCUE=1
;;
swap)
USE_SWAP=1
;;
rootpw=*)
ROOTPW=$(echo $ARG | cut -f2 -d=)
;;
toram)
TORAM=1
VIRGIN=1 # prevent writes to disk since we are supposed to run from RAM
;;
tweaks=*)
# Comma-separated set of usability tweaks.
# nga: no glamor 2d acceleration.
# nsh: no sub-pixel hinting in freetype.
# tpb: trackpoint scrolling while pressing middle mouse button.
# syn: start synaptics daemon and extend X.Org capabilities.
# ssh: start SSH daemon (disabled by default).
TWEAKS=$(echo $ARG | cut -f2 -d=)
;;
tz=*)
TZ=$(echo $ARG | cut -f2 -d=)
;;
waitforroot=*|rootdelay=*)
WAIT=$(echo $ARG | cut -f2 -d=)
;;
xkb=*)
XKB=$(echo $ARG | cut -f2 -d=)
;;
esac
done
# Verbose boot script execution:
[ $DEBUG -ge 2 ] && set -x
debugit () {
if [ $DEBUG -eq 0 -o $DEBUG -gt 3 ]; then
return
elif [ $DEBUG -le 2 ]; then
echo "DEBUG>> -- busybox blkid info -- :"
busybox blkid | while read LINE ; do echo "DEBUG>> $LINE" ; done
echo "DEBUG>> -- mount info -- :"
mount | while read LINE ; do echo "DEBUG>> $LINE" ; done
fi
echo "DEBUG>> -- Press ENTER to continue -- : "
read JUNK
return
}
rescue() {
echo
if [ "x$1" != "x" ]; then
echo "$1"
else
echo "RESCUE mode"
echo
echo " You can try to fix or rescue your system now. If you want"
echo " to boot into your fixed system, mount your root filesystem"
echo " read-only under /mnt:"
echo
echo " # mount -o ro -t filesystem root_device /mnt"
fi
echo
echo " Type 'exit' when things are done."
echo
/bin/sh
}
# If udevd is available, use it to generate block devices
# else use mdev to read sysfs and generate the needed devices
if [ -x /sbin/udevd -a -x /sbin/udevadm ]; then
/sbin/udevd --daemon --resolve-names=never
/sbin/udevadm trigger --subsystem-match=block --action=add
if [ -n "$NFSHOST" ]; then
# We also need network devices if NFS root is requested:
if [ -z "$(/sbin/udevadm trigger --subsystem-match=net --action=add -v -n |rev |cut -d/ -f1 |rev |grep -v lo)" ]; then
/sbin/udevadm trigger $DEBUGV
else
/sbin/udevadm trigger --subsystem-match=net --action=add $DEBUGV
fi
fi
/sbin/udevadm settle --timeout=10
else
[ "$DEVTMPFS" != "1" ] && mdev -s
fi
# Load kernel modules (ideally this was already done by udev):
if [ ! -d /lib/modules/$(uname -r) ]; then
echo "${MARKER}: No kernel modules found for Linux $(uname -r)."
elif [ -x ./load_kernel_modules ]; then # use load_kernel_modules script:
echo "${MARKER}: 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/$(uname -r)/*.*o 1> /dev/null 2> /dev/null ; then
echo "${MARKER}: 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 $WAIT
# Fire at least one busybox blkid:
busybox blkid 1>/dev/null 2>/dev/null
if [ "$RESCUE" = "" ]; then
if [ $LOCALHD -eq 1 ]; then
# We will initialize RAID/LVM/BTRFS on local harddisks:
# 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
# Initialize LVM:
if [ -x /sbin/vgchange ]; then
mkdir -p /var/lock/lvm # this avoids useless warnings
/sbin/vgchange -ay --ignorelockingfailure 2>/dev/null
/sbin/udevadm settle --timeout=10
fi
# Scan for btrfs multi-device filesystems:
if [ -x /sbin/btrfs ]; then
/sbin/btrfs device scan
fi
fi
# --------------------------------------------------------------------- #
# SLACKWARE LIVE - START #
# --------------------------------------------------------------------- #
## Support functions ##
cidr_cvt() {
# Function to convert the netmask from CIDR format to dot notation.
# Number of args to shift, 255..255, first non-255 byte, zeroes
set -- $(( 5 - ($1 / 8) )) 255 255 255 255 $(( (255 << (8 - ($1 % 8))) & 255 )) 0 0 0
[ $1 -gt 1 ] && shift $1 || shift
echo ${1-0}.${2-0}.${3-0}.${4-0}
}
setnet() {
# Find and configure the network interface for NFS root support.
# Assume nothing about the method of network configuration:
ENET_MODE="ask"
echo "${MARKER}: Configuring network interface for NFS mount."
# Does the commandline have NIC information for us?
# Format is 'nic=driver:interface:<dhcp|static>:ip:mask:gw'
if [ -n "$ENET" ]; then
DRIVER=$(echo $ENET |cut -f1 -d:)
INTERFACE=$(echo $ENET |cut -f2 -d:)
ENET_MODE=$(echo $ENET |cut -f3 -d:)
if [ "$ENET_MODE" = "static" ]; then
IPADDR=$(echo $ENET |cut -f4 -d:)
NETMASK=$(echo $ENET |cut -f5 -d:)
# We allow for CIDR notation of the netmask (0 < NETMASK < 25):
if [ "$(echo $NETMASK |tr -cd '\.')" != "..." ]; then
NETMASK=$(cidr_cvt $NETMASK)
fi
# Determine BROADCAST:
eval $(ipcalc -b $IPADDR $NETMASK)
# Not mandatory:
GATEWAY=$(echo $ENET | cut -f6 -d:)
fi
fi
# If no interface is present the cmdline should have provided a driver:
if [ $(cat /proc/net/dev |grep ':' |sed -e "s/^ *//" |cut -f1 -d: |grep -v lo |wc -l) -eq 0 ]; then
if [ "x${DRIVER}" != "x" ]; then
# This takes silent care of 'DRIVER=auto' as well...
modprobe ${DRIVER} 1>/dev/null 2>/dev/null
fi
fi
# Let's determine the interface:
if [ "x$INTERFACE" = "x" -o "$INTERFACE" = "auto" ]; then
# Cmdline did not provide a nic or it's "auto" to let dhcpcd find out:
for EDEV in $(cat /proc/net/dev |grep ':' |sed -e "s/^ *//" |cut -f1 -d: |grep -v lo) ; do
if grep -q $(echo ${EDEV}: |cut -f 1 -d :): /proc/net/wireless ; then
continue # skip wireless interfaces
fi
# If this configures an interface, we're done with dhcpcd afterwards:
/sbin/dhcpcd -L -p -t $DHCPWAIT $EDEV &
done
unset EDEV
# Wait at most DHCPWAIT seconds for a DHCP-configured interface to appear:
for ITER in $(seq 0 $DHCPWAIT); do
if $(ip -f inet -o addr show | grep -v " lo " 1>/dev/null 2>/dev/null)
then
# Found one!
break
fi
sleep 1
done
# What interface did dhcpcd configure?
INTERFACE=""
for EDEV in $(cat /proc/net/dev |grep ':' |sed -e "s/^ *//" |cut -f1 -d: |grep -v lo); do
if [ -s /run/dhcpcd/dhcpcd-${EDEV}.pid ]; then
INTERFACE="${EDEV}"
break
fi
done
unset EDEV
fi
if [ "x$INTERFACE" = "x" ]; then
# Failed to find a configured interface... desperate measure:
echo "${MARKER}: Failed to find network interface... trouble ahead."
INTERFACE="eth0"
fi
# We know our INTERFACE, so let's configure it:
if [ "$ENET_MODE" = "ask" -o "$ENET_MODE" = "dhcp" ]; then
# Invoke dhcpcd only if it was not called yet:
if [ ! -s /run/dhcpcd/dhcpcd-${INTERFACE}.pid ]; then
/sbin/dhcpcd -L -p -t $DHCPWAIT $INTERFACE
fi
else
# Kill dhcpcd if we used it to find a statically configured interface:
if [ -s /run/dhcpcd/dhcpcd-${INTERFACE}.pid ]; then
/sbin/dhcpcd -k $INTERFACE
fi
# Static IP address requires IPADDRESS, NETMASK, NETMASK at a minimum:
ifconfig $INTERFACE $IPADDR netmask $NETMASK broadcast $BROADCAST
if [ -n "$GATEWAY" ]; then
route add default gw $GATEWAY metric 1
fi
fi
# Store the interface MAC address so we may modify the hostname with it:
HNMAC=$(ip link show ${INTERFACE} |grep link/ether |tr -s ' ' |cut -d ' ' -f3 |tr -d ':')
} # End setnet()
find_loop() {
# The losetup of busybox is different from the real losetup - watch out!
lodev=$(losetup -f)
if [ -z "$lodev" ]; then
# We exhausted the available loop devices, so create the block device:
for NOD in $(seq 0 ${MAXLOOPS}); do
if [ ! -b /dev/loop${NOD} ]; then
mknod -m660 /dev/loop${NOD} b 7 ${NOD}
break
fi
done
lodev=/dev/loop${NOD}
elif [ ! -b $lodev ]; then
# We exhausted the available loop devices, so create the block device:
mknod -m660 $lodev b 7 $(echo $lodev |sed 's%/dev/loop%%')
fi
echo "$lodev"
}
mod_base() {
MY_MOD="$1"
echo $(basename ${MY_MOD}) |rev |cut -d. -f2- |rev
}
find_mod() {
MY_LOC="$1"
( for MY_EXT in ${SQ_EXT_AVAIL} ; do
echo "$(find ${MY_LOC} -name "*.${MY_EXT}" 2>/dev/null)"
done
) | sort
}
find_modloc() {
MY_LOC="$1"
MY_BASE="$2"
if [ $TORAM -ne 0 ]; then
# If we need to copy the module to RAM, we need a place for that:
mkdir -p /mnt/live/toram
# Copy the module to RAM before mounting it, preserving relative path:
MODNAME="$(basename ${MY_LOC})"
MODRELPATH="$(dirname ${MY_LOC} |sed "s,$MY_BASE,,")"
mkdir -p /mnt/live/toram/${MODRELPATH}
cp "${MY_LOC}" "/mnt/live/toram/${MODRELPATH}"
MY_LOC="/mnt/live/toram/${MODRELPATH}/${MODNAME}"
fi
echo "${MY_LOC}"
}
load_modules() {
# SUBSYS can be 'system', 'addons', 'optional':
SUBSYS="$1"
# Find all supported modules:
for MODULE in $(find_mod /mnt/media/${LIVEMAIN}/${SUBSYS}/) ; do
# Strip path and extension from the modulename:
MODBASE="$(mod_base ${MODULE})"
if [ "$SUBSYS" = "optional" ]; then
# Load one or more optionals by using boot parameter 'load':
# load=mod1[,mod2[,mod3]]
if [ -z "$LOAD" -o -z "$(echo ",${LOAD}," |grep -i ",$(echo $MODBASE |cut -d- -f2),")" ]; then
continue
fi
elif [ "$SUBSYS" = "addons" ]; then
# 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
continue
fi
fi
MODLOC=$(find_modloc ${MODULE} /mnt/media)
if [ -d /mnt/live/modules/${MODBASE} ]; then
echo "${MARKER}: duplicate $SUBSYS module '${MODBASE}', excluding it from the overlay."
echo "$MODBASE" >> /mnt/live/modules/dupes
else
mkdir /mnt/live/modules/${MODBASE}
mount -t squashfs -o loop ${MODLOC} /mnt/live/modules/${MODBASE}
if [ $? -eq 0 ]; then
if echo ${MODBASE} | grep -q ^0000 -a ; then
echo "${MARKER}: ${CDISTRO} Live based on liveslak-${VERSION} #$(cat /mnt/live/modules/${MODBASE}/${MARKER})"
fi
RODIRS=":/mnt/live/modules/${MODBASE}${RODIRS}"
# 0099-* are the Live customizations, exclude those for setup2hd:
if ! echo ${MODBASE} | grep -q ^0099 ; then
FS2HD=":/mnt/live/modules/${MODBASE}${FS2HD}"
fi
else
echo "${MARKER}: Failed to mount $SUBSYS module '${MODBASE}', excluding it from the overlay."
echo "$MODBASE" >> /mnt/live/modules/failed
fi
fi
done
}
## End support functions ##
# We need a mounted filesystem here to be able to do a switch_root later,
# so we create one in RAM:
if [ $TORAM -eq 1 ]; then
RAMSIZE=90% # need to be able to load the entire OS in RAM
else
RAMSIZE=80% # the default value.
fi
mount -t tmpfs -o defaults,size=${RAMSIZE} none /mnt
# Find the Slackware Live media.
# TIP: Increase WAIT to give USB devices a chance to be seen by the kernel.
mkdir /mnt/media
if [ -n "$NFSHOST" ]; then
# NFS root. First configure our network interface:
setnet
# Mount the NFS share and hope for the best:
mount -t nfs -o nolock,vers=3 $NFSHOST:$NFSPATH /mnt/media
LIVEALL="$NFSHOST:$NFSPATH"
LIVEMEDIA="$LIVEALL"
# No writing on NFS exports, overlayfs does not support it:
VIRGIN=1
elif [ -z "$LIVEMEDIA" ]; then
# LIVEMEDIA not specified on the boot commandline using "livemedia="
# Filter out the block devices, only look at partitions at first:
LIVEALL=$(busybox blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep "[0-9]$")
LIVEMEDIA=$(busybox blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep "[0-9]$" |head -1)
if [ ! -z "$LIVEMEDIA" ]; then
# That was easy... we found the media straight away.
# Determine filesystem type ('iso9660' means we found a CDROM/DVD)
LIVEFS=$(busybox blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t $LIVEFS -o ro $LIVEMEDIA /mnt/media
else
LIVEALL=$(busybox blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep -v "[0-9]$")
LIVEMEDIA=$(busybox blkid |grep LABEL="\"$MEDIALABEL\"" |cut -d: -f1 |grep -v "[0-9]$" |head -1)
if [ ! -z "$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=$(busybox blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t $LIVEFS -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 $(busybox blkid |cut -d: -f1 |grep "[0-9]$") $(busybox blkid |cut -d: -f1 |grep -v "[0-9]$") ; do
SLFS=$(busybox blkid $SLDEVICE |rev |cut -d'"' -f2 |rev)
mount -t $SLFS -o ro $SLDEVICE /mnt/media
if [ -d /mnt/media/${LIVEMAIN} ]; then
# Found our media!
LIVEALL=$SLDEVICE
LIVEMEDIA=$SLDEVICE
LIVEFS=$(busybox blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
break
else
umount $SLDEVICE
unset SLDEVICE
fi
done
fi
fi
if [ -n "$LIVEMEDIA" ]; then
# Gotcha!
break
else
echo "${MARKER} -- Try /dev/sdb1 as last sort."
SLDEVICE="/dev/sdb1"
SLFS="iso9660"
mount -t $SLFS -o ro $SLDEVICE /mnt/media
if [ -d /mnt/media/${LIVEMAIN} ]; then
# Found our media!
LIVEALL=$SLDEVICE
LIVEMEDIA=$SLDEVICE
LIVEFS="$SLFS"
else
umount $SLDEVICE
unset SLDEVICE
fi
fi
sleep 1
else
# LIVEMEDIA was specified on the boot commandline using "livemedia="
if [ "$LIVEMEDIA" != "scandev" -a ! -b "$LIVEMEDIA" ]; then
# Passed a UUID or LABEL?
LIVEALL=$(findfs UUID=$LIVEMEDIA 2>/dev/null) || LIVEALL=$(findfs LABEL=$LIVEMEDIA 2>/dev/null)
LIVEMEDIA="$LIVEALL"
else
LIVEALL="$LIVEMEDIA"
fi
if [ -z "$LIVEALL" ]; then
echo "${MARKER}: Live media '$LIVEMEDIA' not found... trouble ahead."
else
if [ -n "$LIVEPATH" -a "$LIVEPATH" != "$LIVEMEDIA" ]; then
# Boot option used: "livemedia=/dev/sdX:/path/to/live.iso",
# or: "livemedia=scandev:/path/to/live.iso",
# instead of just: "livemedia=/dev/sdX".
#
# First mount the partition and then loopmount the ISO:
SUPERMNT=/mnt/super_$(od -An -N1 -tu1 /dev/urandom |tr -d ' ')
mkdir -p ${SUPERMNT}
#
if [ "$LIVEMEDIA" = "scandev" ]; then
# Scan partitions to find the one with the ISO and set LIVEMEDIA:
echo "${MARKER}: Scanning for '$LIVEPATH'..."
for ISOPART in $(busybox blkid |cut -d: -f1 |grep "[0-9]$") $(busybox blkid |cut -d: -f1 |grep -v "[0-9]$") ; do
PARTFS=$(busybox blkid $ISOPART |rev |cut -d'"' -f2 |rev)
# Abuse the $SUPERMNT a bit, we will actually use it later:
mount -t $PARTFS -o ro $ISOPART ${SUPERMNT}
if [ -f ${SUPERMNT}/${LIVEPATH} ]; then
# Found our ISO!
LIVEMEDIA=$ISOPART
umount $ISOPART
unset ISOPART
break
else
umount $ISOPART
fi
done
if [ -n "$ISOPART" ]; then
echo "${MARKER}: Partition scan unable to find ISO, trouble ahead."
fi
fi
# At this point we know $LIVEMEDIA - either because the bootparameter
# specified it or else because the 'scandev' found it for us:
SUPERFS=$(busybox blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t $SUPERFS -o ro $LIVEMEDIA ${SUPERMNT}
if [ -f "${SUPERMNT}/$LIVEPATH" ]; then
LIVEFS=$(busybox blkid "${SUPERMNT}/$LIVEPATH" |rev |cut -d'"' -f2 |rev)
LIVEALL="${SUPERMNT}/$LIVEPATH"
LIVEMEDIA="$LIVEALL"
MOUNTOPTS="loop"
fi
fi
LIVEFS=$(busybox blkid $LIVEMEDIA |rev |cut -d'"' -f2 |rev)
mount -t $LIVEFS -o ${MOUNTOPTS:-ro} $LIVEMEDIA /mnt/media
fi
fi
# Finished determining the media availability, it should be mounted now.
if [ ! -z "$LIVEMEDIA" ]; then
echo "${MARKER}: Live media found at ${LIVEMEDIA}."
if [ ! -d /mnt/media/${LIVEMAIN} ]; then
echo "${MARKER}: However, live media was not mounted... trouble ahead."
fi
if [ "$LIVEMEDIA" != "$LIVEALL" ]; then
echo "${MARKER}: NOTE: Multiple partitions with '$MEDIALABEL' label were found ($(echo $LIVEALL))... success not guaranteed."
fi
else
echo "${MARKER}: No live media found... trouble ahead."
echo "${MARKER}: Try adding \"rootdelay=20\" to the boot command."
debugit
rescue
fi
debugit
# liveslak can optionally load a OS config file "@DISTRO@_os.cfg"
# which contains "VARIABLE=value" lines, where VARIABLE is one of
# the following variables that are used below in the live init script:
# BLACKLIST, KEYMAP, LIVE_HOSTNAME, LOAD, LOCALE, LUKSVOL,
# NOLOAD, RUNLEVEL, TWEAKS, TZ, XKB.
if [ -z "$CFGACTION" ]; then
# Read OS configuration from disk file if present and set any variable
# from that file if it has not yet been defined in the init script
# (prevent this by adding 'cfg=skip' to the boot commandline).
if [ -f "/mnt/media/${LIVEMAIN}/${DISTROCFG}" ]; then
echo "${MARKER}: Reading config from /${LIVEMAIN}/${DISTROCFG}"
for LIVEPARM in \
BLACKLIST KEYMAP LIVE_HOSTNAME LOAD LOCALE LUKSVOL \
NOLOAD RUNLEVEL TWEAKS TZ XKB ;
do
if [ -n "${LIVEPARM}" ]; then
eval $(grep -w ${LIVEPARM} /mnt/media/${LIVEMAIN}/${DISTROCFG})
fi
done
fi
elif [ "$CFGACTION" = "write" ]; then
# Write liveslak OS parameters to disk:
echo > /mnt/media/${LIVEMAIN}/${DISTROCFG} 2>/dev/null
if [ $? -ne 0 ]; then
echo "${MARKER}: Live media read-only, cannot write config file."
else
echo "${MARKER}: Writing config to /${LIVEMAIN}/${DISTROCFG}"
for LIVEPARM in \
BLACKLIST KEYMAP LIVE_HOSTNAME LOAD LOCALE LUKSVOL \
NOLOAD RUNLEVEL TWEAKS TZ XKB ;
do
if [ -n "$(eval echo \$$LIVEPARM)" ]; then
echo $LIVEPARM=$(eval echo \$$LIVEPARM) >> /mnt/media/${LIVEMAIN}/${DISTROCFG}
fi
done
fi
fi
# Some variables require a value before continuing, so if they were not set
# on the boot commandline nor in a config file, we take care of it now:
if [ -z "$KEYMAP" ]; then
KEYMAP="${DEF_KBD}"
fi
if [ -z "$TZ" ]; then
TZ="${DEF_TZ}"
fi
if [ -z "$LOCALE" ]; then
LOCALE="${DEF_LOCALE}"
fi
# Load a custom keyboard mapping:
if [ -n "$KEYMAP" ]; then
echo "${MARKER}: Loading '$KEYMAP' keyboard mapping:"
tar xzOf /etc/keymaps.tar.gz ${KEYMAP}.bmap | loadkmap
fi
# Start assembling our live system components below /mnt/live :
mkdir /mnt/live
# Mount our squashed modules (.sxz or other supported extension)
mkdir /mnt/live/modules
if [ $TORAM -ne 0 ]; then
echo "${MARKER}: Copying Live modules to RAM, please be patient."
fi
# 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=""
FS2HD=""
# First, the base Slackware system components:
load_modules system
# 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 '-'.
load_modules addons
# 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 '-'.
load_modules optional
# Get rid of the starting colon:
RODIRS=$(echo $RODIRS |cut -c2-)
FS2HD=$(echo $FS2HD |cut -c2-)
if [ $TORAM -ne 0 ]; then
echo "${MARKER}: Live OS copied to RAM, you can remove the Live medium."
if [ "LIVEFS" = "iso9660" ]; then
eject ${LIVEMEDIA}
fi
fi
# Setup persistence in case our media is writable, *and* the user
# has created a directory "persistence" in the root of the media.
# otherwise we let the block changes accumulate in RAM only.
# Create the mount point for the writable upper directory of the overlay:
# Assume the default to be a readonly media - we write to RAM:
UPPERDIR=/mnt/live/changes
OVLWORK=/mnt/live/.ovlwork
if [ "$VIRGIN" = "0" ]; then
if [ "LIVEFS" != "iso9660" -a -d /mnt/media/${PERSISTENCE} ]; then
# Looks OK, but we need to remount the media in order to write
# to the persistence directory:
mount -o remount,rw /mnt/media
# Try a write... just to be dead sure:
if touch /mnt/media/${PERSISTENCE}/.rwtest 2>/dev/null && rm /mnt/media/${PERSISTENCE}/.rwtest 2>/dev/null ; then
# Writable media and we are allowed to write to it.
if [ "$WIPE_PERSISTENCE" = "1" -o -f /mnt/media/${PERSISTENCE}/.wipe ]; then
echo "${MARKER}: Wiping existing persistent data in '/${PERSISTENCE}'."
rm -f /mnt/media/${PERSISTENCE}/.wipe 2>/dev/null
find /mnt/media/${PERSISTENCE}/ -mindepth 1 -exec rm -rf {} \; 2>/dev/null
fi
echo "${MARKER}: Writing persistent changes to media directory '/${PERSISTENCE}'."
UPPERDIR=/mnt/media/${PERSISTENCE}
OVLWORK=/mnt/media/.ovlwork
fi
elif [ "LIVEFS" != "iso9660" -a -f /mnt/media/${PERSISTENCE}.img ]; then
# Use a container file; the filesystem needs to be writable:
mount -o remount,rw /mnt/media
# Find a free loop device to mount the persistence container file:
prdev=$(find_loop)
prdir=$(basename ${PERSISTENCE})_$(od -An -N1 -tu1 /dev/urandom |tr -d ' ')
mkdir -p /mnt/live/${prdir}
losetup $prdev /mnt/media/${PERSISTENCE}.img
# Check if the persistence container is LUKS encrypted:
if cryptsetup isLuks $prdev 1>/dev/null 2>/dev/null ; then
echo "Unlocking LUKS encrypted persistence file '/${PERSISTENCE}.img'"
cryptsetup luksOpen $prdev $(basename ${PERSISTENCE}) </dev/tty0 >/dev/tty0 2>&1
if [ $? -ne 0 ]; then
echo "${MARKER}: Failed to unlock persistence file '/${PERSISTENCE}.img'."
echo "${MARKER}: Falling back to RAM."
else
# LUKS properly unlocked; from now on use the mapper device instead:
prdev=/dev/mapper/$(basename ${PERSISTENCE})
fi
fi
prfs=$(busybox blkid $prdev |rev |cut -d'"' -f2 |rev)
mount -t $prfs $prdev /mnt/live/${prdir} 2>/dev/null
if [ $? -ne 0 ]; then
echo "${MARKER}: Failed to mount persistence file '/${PERSISTENCE}.img'."
echo "${MARKER}: Falling back to RAM."
else
if [ "$WIPE_PERSISTENCE" = "1" -o -f /mnt/live/${prdir}/$(basename ${PERSISTENCE})/.wipe ]; then
echo "${MARKER}: Wiping existing persistent data in '/${PERSISTENCE}.img'."
rm -f /mnt/live/${prdir}/$(basename ${PERSISTENCE})/.wipe 2>/dev/null
find /mnt/live/${prdir}/$(basename ${PERSISTENCE})/ -mindepth 1 -exec rm -rf {} \; 2>/dev/null
fi
echo "${MARKER}: Writing persistent changes to file '/${PERSISTENCE}.img'."
UPPERDIR=/mnt/live/${prdir}/$(basename ${PERSISTENCE})
OVLWORK=/mnt/live/${prdir}/.ovlwork
fi
fi
else
echo "${MARKER}: Writing changes to RAM - no persistence:"
if [ ! -z "$LUKSVOL" ]; then
# Even without persistence, we need to be able to write to the partition
# if we are using a LUKS container file:
mount -o remount,rw /mnt/media
fi
fi
debugit
# Create the writable upper directory, plus the workdir which is required
# for overlay to function (the two must be in the same POSIX filesystem):
[ ! -d ${UPPERDIR} ] && mkdir -p ${UPPERDIR}
[ ! -d ${OVLWORK} ] && mkdir -p ${OVLWORK}
# Create the overlays of readonly and writable directories:
mkdir -p /mnt/${LIVEMAIN}fs
mkdir -p /mnt/overlay
# We are going to use a readonly overlay of the unmodified filesystem
# as source for 'setup2hd':
mount -t overlay -o lowerdir=${FS2HD} overlay /mnt/${LIVEMAIN}fs
# And this is the actual Live overlay:
mount -t overlay -o workdir=${OVLWORK},upperdir=${UPPERDIR},lowerdir=${RODIRS} overlay /mnt/overlay
MNTSTAT=$?
if [ "$VIRGIN" = "0" ]; then
if [ $MNTSTAT -ne 0 ]; then
# Failed to create the persistent overlay - try without persistence:
echo "${MARKER}: Failed to create persistent overlay, attempting to continue in RAM."
# Clean up and re-create upper and work directories:
rmdir $UPPERDIR 2>/dev/null
rmdir $OVLWORK 2>/dev/null
[ -n "${prdir}" ] && rmdir /mnt/live/${prdir} 2>/dev/null
VIRGIN=1
UPPERDIR=/mnt/live/changes
OVLWORK=/mnt/live/.ovlwork
mkdir -p ${UPPERDIR}
mkdir -p ${OVLWORK}
mount -t overlay -o workdir=${OVLWORK},upperdir=${UPPERDIR},lowerdir=${RODIRS} overlay /mnt/overlay
else
# Use a predictable name "changes" for the changes-directory which we can
# use later to squash its contents into a new .sxz module if needed.
# Will be a directory when there's no persistence, otherwise a bind-mount.
mkdir -p /mnt/live/changes
mount --rbind ${UPPERDIR} /mnt/live/changes
fi
fi
debugit
# Make the underpinning RAM fs accessible in the live system (for fun):
mkdir -p /mnt/overlay/mnt/live
mount --rbind /mnt/live /mnt/overlay/mnt/live
mkdir -p /mnt/overlay/mnt/${LIVEMAIN}fs
mount --bind /mnt/${LIVEMAIN}fs /mnt/overlay/mnt/${LIVEMAIN}fs
# Same for the Linux filesystem on the USB stick:
mkdir -p /mnt/overlay/mnt/livemedia
if [ $TORAM -eq 0 ]; then
mount --bind /mnt/media /mnt/overlay/mnt/livemedia
else
# For PXE server we need to provide kernel and initrd too,
# not just the modules:
cp -af /mnt/media/boot /mnt/live/toram/
mount --bind /mnt/live/toram /mnt/overlay/mnt/livemedia
fi
if [ ! -z "$USE_SWAP" ]; then
# Use any available swap device:
for SWAPD in $(busybox blkid |grep TYPE="\"swap\"" |cut -d: -f1) ; do
echo "${MARKER}: Enabling swapping to '$SWAPD'"
echo "$SWAPD swap swap defaults 0 0" >> /mnt/overlay/etc/fstab
done
fi
if [ ! -z "$KEYMAP" ]; then
# Configure custom keyboard mapping in console and X:
echo "${MARKER}: Switching live console 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 ${KEYMAP}
fi
EOT
chmod 755 /mnt/overlay/etc/rc.d/rc.keymap
echo "KEYMAP=${KEYMAP}" > /mnt/overlay/etc/vconsole.conf
fi
if [ ! -z "$KEYMAP" -o ! -z "$XKB" ]; then
# Set a keyboard mapping in X.Org, derived from the console map if needed:
# Variable XKB can be set to "XkbLayout,XkbVariant,XkbOptions".
# For example "xkb=ch,fr,compose:sclk,grp:alt_shift_toggle"
# Note that the XkbOptions can be several comma-separated values.
# The XkbLayout and XkbVariant values must not contain commas.
# You can set just the XkbVariant by adding something like "kbd=ch xkb=,fr"
# Catch a missing comma in the "$XKB" string value which messes with 'cut':
XKB="$XKB,"
XKBLAYOUT=$(echo $XKB |cut -d, -f1)
XKBVARIANT=$(echo $XKB |cut -d, -f2)
XKBOPTIONS=$(echo $XKB |cut -d, -f3-)
# Ensure that XKBLAYOUT gets a value;
# XKBVARIANT and XKBOPTIONS are allowed to be empty.
if [ -z "$XKBLAYOUT" ]; then
if [ -z "$KEYMAP" ]; then
XKBLAYOUT="us"
else
XKBLAYOUT="$(echo $KEYMAP |cut -c1-2)"
fi
fi
else
XKBLAYOUT="us"
fi
echo "${MARKER}: Switching live X desktop to '$XKBLAYOUT' keyboard"
if [ "$XKBLAYOUT" != "us" ]; then
# If the layout is not 'us' then add 'us' as a secondary nevertheless:
XKBLAYOUT="$XKBLAYOUT,us"
XKBVARIANT="$XKBVARIANT,"
fi