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|
#!/bin/sh
MODULE_DIR=/initrd.d
BOOT_ROOT=
ROOT_DEVICE=
early_setup() {
mkdir /proc
mount -t proc proc /proc
mkdir /mnt
echo -n "creating device nodes: "
grep '^ *[0-9]' /proc/partitions | while read major minor blocks dev
do
if [ ! -e /dev/$dev ]; then
echo -n "$dev "
[ -e /dev/$dev ] || mknod /dev/$dev b $major $minor
fi
done
echo
}
read_args() {
CMDLINE=`cat /proc/cmdline`
for arg in $CMDLINE; do
optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
case $arg in
root=*)
ROOT_DEVICE=$optarg ;;
rootdelay=*)
rootdelay=$optarg ;;
esac
done
}
load_modules() {
for module in $MODULE_DIR/*; do
source $module
done
}
boot_root() {
cd $BOOT_ROOT
exec switch_root -c /dev/console $BOOT_ROOT /sbin/init
}
boot_failed() {
echo "No valid root device was specified. Please add root=/dev/something to"
echo "the kernel command-line and try again."
echo
exec sh
}
echo "Starting initramfs boot..."
early_setup
read_args
if [ -n "$rootdelay" ]; then
echo "Waiting $rootdelay seconds for devices to settle..."
sleep $rootdelay
fi
load_modules
[ -n "$BOOT_ROOT" ] && boot_root
boot_failed
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