141 lines
2.9 KiB
Bash
141 lines
2.9 KiB
Bash
#!/bin/sh
|
|
|
|
PATH=/sbin:/bin:/usr/sbin:/usr/bin
|
|
|
|
emergency_shell()
|
|
{
|
|
echo "Bug in initramfs /init detected. Dropping to a shell. Good luck!"
|
|
echo
|
|
sh
|
|
}
|
|
trap "emergency_shell" 0 2
|
|
|
|
# exit immediately if a command fails
|
|
set -e
|
|
|
|
ROOT_MOUNT="/rootfs/"
|
|
ROOT_IMAGE="rootfs.img"
|
|
MOUNT="/bin/mount"
|
|
UMOUNT="/bin/umount"
|
|
ISOLINUX=""
|
|
UNIONFS="no"
|
|
|
|
early_setup() {
|
|
mkdir /proc
|
|
mkdir /sys
|
|
mount -t proc proc /proc
|
|
mount -t sysfs sysfs /sys
|
|
|
|
# support modular kernel
|
|
modprobe isofs 2> /dev/null
|
|
|
|
mkdir /run
|
|
udevd --daemon
|
|
udevadm trigger --action=add
|
|
}
|
|
|
|
read_args() {
|
|
[ -z "$CMDLINE" ] && CMDLINE=`cat /proc/cmdline`
|
|
for arg in $CMDLINE; do
|
|
optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
|
|
case $arg in
|
|
root=*)
|
|
ROOT_DEVICE=$optarg ;;
|
|
rootfstype=*)
|
|
modprobe $optarg 2> /dev/null ;;
|
|
LABEL=*)
|
|
label=$optarg ;;
|
|
video=*)
|
|
video_mode=$arg ;;
|
|
vga=*)
|
|
vga_mode=$arg ;;
|
|
console=*)
|
|
if [ -z "${console_params}" ]; then
|
|
console_params=$arg
|
|
else
|
|
console_params="$console_params $arg"
|
|
fi
|
|
esac
|
|
done
|
|
}
|
|
|
|
boot_live_root() {
|
|
killall udevd 2>/dev/null
|
|
|
|
# use devtmpfs if available
|
|
if grep -q devtmpfs /proc/filesystems; then
|
|
mount -t devtmpfs devtmpfs $ROOT_MOUNT/dev
|
|
fi
|
|
|
|
cd $ROOT_MOUNT
|
|
exec switch_root -c /dev/console $ROOT_MOUNT /sbin/init
|
|
}
|
|
|
|
fatal() {
|
|
echo $1 >$CONSOLE
|
|
echo >$CONSOLE
|
|
exec sh
|
|
}
|
|
|
|
early_setup
|
|
|
|
[ -z "$CONSOLE" ] && CONSOLE="/dev/console"
|
|
|
|
read_args
|
|
|
|
echo "Waiting for removable media..."
|
|
while true
|
|
do
|
|
for i in `ls /media 2>/dev/null`; do
|
|
if [ -f /media/$i/$ROOT_IMAGE ] ; then
|
|
found="yes"
|
|
break
|
|
elif [ -f /media/$i/isolinux/$ROOT_IMAGE ]; then
|
|
found="yes"
|
|
ISOLINUX="isolinux"
|
|
break
|
|
fi
|
|
done
|
|
if [ "$found" = "yes" ]; then
|
|
break;
|
|
fi
|
|
sleep 1
|
|
done
|
|
|
|
case $label in
|
|
boot)
|
|
mkdir $ROOT_MOUNT
|
|
mknod /dev/loop0 b 7 0 2>/dev/null
|
|
|
|
|
|
if [ "$UNIONFS" = "yes" ]; then
|
|
mkdir /rootfs-tmp
|
|
|
|
if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE /rootfs-tmp ; then
|
|
fatal "Could not mount rootfs image"
|
|
else
|
|
mkdir /cow
|
|
mount -t tmpfs -o rw,noatime,mode=755 tmpfs /cow
|
|
mount -t unionfs -o dirs=/cow:/rootfs-tmp=ro unionfs $ROOT_MOUNT
|
|
boot_live_root
|
|
fi
|
|
else
|
|
if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
|
|
fatal "Could not mount rootfs image"
|
|
else
|
|
boot_live_root
|
|
fi
|
|
fi
|
|
;;
|
|
install|install-efi)
|
|
if [ -f /media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then
|
|
./$label.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode $console_params
|
|
else
|
|
fatal "Could not find $label script"
|
|
fi
|
|
|
|
# If we're getting here, we failed...
|
|
fatal "Installation image failed"
|
|
;;
|
|
esac
|