171 lines
3.9 KiB
Bash
171 lines
3.9 KiB
Bash
#!/bin/sh
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PATH=/sbin:/bin:/usr/sbin:/usr/bin
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ROOT_MOUNT="/rootfs/"
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ROOT_IMAGE="rootfs.img"
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MOUNT="/bin/mount"
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UMOUNT="/bin/umount"
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ISOLINUX=""
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UNIONFS="no"
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# Copied from initramfs-framework. The core of this script probably should be
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# turned into initramfs-framework modules to reduce duplication.
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udev_daemon() {
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OPTIONS="/sbin/udevd /lib/udev/udevd /lib/systemd/systemd-udevd"
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for o in $OPTIONS; do
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if [ -x "$o" ]; then
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echo $o
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return 0
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fi
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done
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return 1
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}
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_UDEV_DAEMON=`udev_daemon`
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early_setup() {
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mkdir -p /proc
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mkdir -p /sys
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devtmpfs none /dev
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# support modular kernel
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modprobe isofs 2> /dev/null
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mkdir -p /run
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mkdir -p /var/run
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$_UDEV_DAEMON --daemon
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udevadm trigger --action=add
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}
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read_args() {
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[ -z "$CMDLINE" ] && CMDLINE=`cat /proc/cmdline`
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for arg in $CMDLINE; do
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optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
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case $arg in
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root=*)
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ROOT_DEVICE=$optarg ;;
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rootfstype=*)
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modprobe $optarg 2> /dev/null ;;
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LABEL=*)
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label=$optarg ;;
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video=*)
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video_mode=$arg ;;
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vga=*)
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vga_mode=$arg ;;
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console=*)
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if [ -z "${console_params}" ]; then
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console_params=$arg
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else
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console_params="$console_params $arg"
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fi ;;
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debugshell*)
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if [ -z "$optarg" ]; then
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shelltimeout=30
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else
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shelltimeout=$optarg
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fi
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esac
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done
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}
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boot_live_root() {
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killall udevd 2>/dev/null
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# Move the mount points of some filesystems over to
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# the corresponding directories under the real root filesystem.
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mount -n --move /proc ${ROOT_MOUNT}/proc
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mount -n --move /sys ${ROOT_MOUNT}/sys
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mount -n --move /dev ${ROOT_MOUNT}/dev
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cd $ROOT_MOUNT
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exec switch_root -c /dev/console $ROOT_MOUNT /sbin/init
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}
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fatal() {
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echo $1 >$CONSOLE
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echo >$CONSOLE
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exec sh
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}
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early_setup
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[ -z "$CONSOLE" ] && CONSOLE="/dev/console"
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read_args
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echo "Waiting for removable media..."
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C=0
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while true
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do
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for i in `ls /media 2>/dev/null`; do
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if [ -f /media/$i/$ROOT_IMAGE ] ; then
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found="yes"
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break
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elif [ -f /media/$i/isolinux/$ROOT_IMAGE ]; then
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found="yes"
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ISOLINUX="isolinux"
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break
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fi
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done
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if [ "$found" = "yes" ]; then
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break;
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fi
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# don't wait for more than $shelltimeout seconds, if it's set
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if [ -n "$shelltimeout" ]; then
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echo -n " " $(( $shelltimeout - $C ))
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if [ $C -ge $shelltimeout ]; then
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echo "..."
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echo "Mounted filesystems"
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mount | grep media
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echo "Available block devices"
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ls /dev/sd*
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fatal "Cannot find rootfs.img file in /media/* , dropping to a shell "
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fi
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C=$(( C + 1 ))
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fi
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sleep 1
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done
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case $label in
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boot)
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mkdir $ROOT_MOUNT
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mknod /dev/loop0 b 7 0 2>/dev/null
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if [ "$UNIONFS" = "yes" ]; then
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mkdir /rootfs-tmp
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if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE /rootfs-tmp ; then
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fatal "Could not mount rootfs image"
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else
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mkdir /cow
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mount -t tmpfs -o rw,noatime,mode=755 tmpfs /cow
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mount -t unionfs -o dirs=/cow:/rootfs-tmp=ro unionfs $ROOT_MOUNT
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boot_live_root
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fi
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else
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if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
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fatal "Could not mount rootfs image"
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else
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boot_live_root
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fi
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fi
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;;
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install|install-efi)
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if [ -f /media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then
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./$label.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode $console_params
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else
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fatal "Could not find $label script"
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fi
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# If we're getting here, we failed...
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fatal "Installation image failed"
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;;
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esac
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