genkernel_fork/defaults/linuxrc

#!/bin/sh

. /etc/initrd.defaults
. /etc/initrd.scripts

# Clean input/output
exec >${CONSOLE} <${CONSOLE} 2>&1

if [ "$$" != '1' ]
then
	echo '/linuxrc has to be run as the init process as the one'
	echo 'with a PID of 1. Try adding init="/linuxrc" to the'
	echo 'kernel command line or running "exec /linuxrc".'
	exit 1
fi

mount -t proc -o noexec,nosuid,nodev proc /proc >/dev/null 2>&1
mount -o remount,rw / >/dev/null 2>&1
mount -t tmpfs -o rw,nosuid,nodev,relatime,mode=755 none /run 2>&1
mount -t tmpfs none /dev/shm 2>&1

/bin/busybox --install -s

if [ "$0" = '/init' ]
then
	[ -e /linuxrc ] && rm /linuxrc
fi

CMDLINE=$(cat /proc/cmdline)
FAKE_ROOT=''
FAKE_INIT=''
FAKE_ROOTFLAGS=''
INIT_OPTS=''
ROOTFSTYPE='auto'
CRYPT_SILENT=0
QUIET=''

mkdir -p /etc/cmdline /etc/modprobe.d
for x in ${CMDLINE}
do
	case "${x}" in
		real_root=*)
			REAL_ROOT=${x#*=}
		;;
		root=*)
			FAKE_ROOT=${x#*=}
		;;
		subdir=*)
			SUBDIR=${x#*=}
		;;
		real_init=*)
			REAL_INIT=${x#*=}
		;;
		init=*)
			FAKE_INIT=${x#*=}
		;;
		init_opts=*)
			INIT_OPTS=${x#*=}
		;;
		cdroot)
			CDROOT=1
		;;
		cdroot=*)
			CDROOT=1
			CDROOT_DEV=${x#*=}
		;;
		cdroot_type=*)
			CDROOT_TYPE=${x#*=}
		;;
		cdroot_marker=*)
			CDROOT_MARKER=${x#*=}
		;;
		loop=*)
			LOOP=${x#*=}
		;;
		looptype=*)
			LOOPTYPE=${x#*=}
		;;
		isoboot=*)
			ISOBOOT=${x#*=}
		;;
		domdev)
			USE_MDEV=1
		;;
		dolvm)
			USE_LVM_NORMAL=1
		;;
		domdadm)
			USE_MDADM=1
		;;
		dodmraid)
			USE_DMRAID_NORMAL=1
		;;
		dodmraid=*)
			DMRAID_OPTS=${x#*=}
			USE_DMRAID_NORMAL=1
		;;
		domultipath)
			good_msg "Booting with multipath activated."
			USE_MULTIPATH_NORMAL=1
		;;
		dozfs*)
			USE_ZFS=1

			if [ "${x#*=}" = 'force' ]
			then
				ZPOOL_FORCE=-f
			fi
		;;
		quiet)
			QUIET=1
		;;
		debug)
			DEBUG='yes'
		;;
		scandelay=*)
			SDELAY=${x#*=}
		;;
		scandelay)
			SDELAY=3
		;;
		doload=*)
			MDOLIST=${x#*=}
			MDOLIST=$(echo ${MDOLIST} | sed -e 's/,/ /g')
		;;
		nodetect)
			NODETECT=1
		;;
		noload=*)
			MLIST=${x#*=}
			MLIST="$(echo ${MLIST} | sed -e 's/,/ /g')"
			export MLIST
		;;
		CONSOLE=*|console=*)
			CONSOLE=${x#*=}
			CONSOLE=$(basename ${CONSOLE})
		;;
		splash)
			PLYMOUTH=1
		;;
		splash=*)
			FBSPLASH=1
		;;
		lvmraid=*)
			RAID_DEVICES="${x#*=}"
			RAID_DEVICES="$(echo ${RAID_DEVICES} | sed -e 's/,/ /g')"
			USE_LVM_NORMAL=1
		;;
		part=*)
			MDPART=${x#*=}
		;;
		part|partitionable)
			MDPART=1
		;;
		ip=*)
			IP=${x#*=}
		;;
		nfsroot=*)
			NFSROOT=${x#*=}
		;;

		iscsi_initiatorname=*)
			ISCSI_INITIATORNAME=${x#*=}
		;;
		iscsi_target=*)
			ISCSI_TARGET=${x#*=}
		;;
		iscsi_tgpt=*)
			ISCSI_TGPT=${x#*=}
		;;
		iscsi_address=*)
			ISCSI_ADDRESS=${x#*=}
		;;
		iscsi_port=*)
			ISCSI_PORT=${x#*=}
		;;
		iscsi_username=*)
			ISCSI_USERNAME=${x#*=}
		;;
		iscsi_password=*)
			ISCSI_PASSWORD=${x#*=}
		;;
		iscsi_username_in=*)
			ISCSI_USERNAME_IN=${x#*=}
		;;
		iscsi_password_in=*)
			ISCSI_PASSWORD_IN=${x#*=}
		;;
		iscsi_debug=*)
			ISCSI_DEBUG=${x#*=}
		;;
		iscsi_noibft)
			ISCSI_NOIBFT=1
		;;

		crypt_root=*)
			CRYPT_ROOT=${x#*=}
		;;
		crypt_swap=*)
			CRYPT_SWAP=${x#*=}
		;;
		root_key=*)
			CRYPT_ROOT_KEY=${x#*=}
		;;
		root_keydev=*)
			CRYPT_ROOT_KEYDEV=${x#*=}
		;;
		root_trim=*)
			CRYPT_ROOT_TRIM=${x#*=}
		;;

		swap_key=*)
			CRYPT_SWAP_KEY=${x#*=}
		;;
		swap_keydev=*)
			CRYPT_SWAP_KEYDEV=${x#*=}
		;;
		real_resume=*|resume=*)
			REAL_RESUME=${x#*=}
		;;
		noresume)
			NORESUME=1
		;;
		crypt_silent)
			CRYPT_SILENT=1
		;;
		real_rootflags=*)
			REAL_ROOTFLAGS=${x#*=}
		;;
		rootflags=*)
			FAKE_ROOTFLAGS=${x#*=}
		;;
		rootfstype=*)
			ROOTFSTYPE=${x#*=}
		;;
		keymap=*)
			keymap=${x#*=}
		;;
		aufs)
			USE_AUFS=1
		;;
	esac
done

quiet_kmsg

is_livecd || setup_real_root

zfs_init

cmdline_hwopts

mount_devfs

mount_sysfs

devmgr_init

splash_init

modules_init

# Apply scan delay if specified
sdelay

# If we're mdev, we better wait for all the modules to be loaded.
is_mdev && splashcmd init

cd /

start_iscsi

# Setup btrfs, see bug 303529
setup_btrfsctl

# Setup md device nodes if they dont exist
is_mdev && setup_md_device

start_volumes

setup_keymap

# Initialize LUKS root device except for livecd's
is_livecd || start_luks

# Initialize resume from hibernation
is_livecd || resume_init

mkdir -p "${NEW_ROOT}"
CHROOT="${NEW_ROOT}"

# Run debug shell if requested
rundebugshell "before setting up the root filesystem"

# Setup Live system mounts
is_livecd && livecd_init

# Determine root device
rootdev_init

# If CD root is set determine the looptype to boot
is_livecd && livecd_mount

# Re-run this here, which makes sure that it at least had a chance
# to be called.
ensure_initramfs_mounts

splashcmd hasroot "${NEW_ROOT}"

# Execute script on the cdrom just before boot to update things if necessary
cdupdate

if [ "${SUBDIR}" != '' ] && [ -e "${CHROOT}/${SUBDIR}" ]; then
	good_msg "Entering ${SUBDIR} to boot"
	CHROOT="${CHROOT}/${SUBDIR}"
fi

verbose_kmsg

devmgr_terminate

good_msg "Booting (initramfs)"

cd "${CHROOT}"
mkdir -p "${CHROOT}/proc" "${CHROOT}/sys" "${CHROOT}/run"

# If devtmpfs is mounted, try move it to the new root
# If that fails, try to unmount all possible mounts of devtmpfs as
# stuff breaks otherwise
for fs in /run /dev /sys /proc
do
	if grep -qs "$fs" /proc/mounts
	then
		if ! mount --move $fs "${CHROOT}"$fs
		then
			umount $fs || \
			bad_msg "Failed to move and unmount the ramdisk $fs!"
		fi
	fi
done

if [ ! -e "${CHROOT}/dev/console" ] || [ ! -e "${CHROOT}/dev/null" ]
then
	bad_msg "ERROR: your real /dev is missing console and null"
elif [ -e /etc/initrd.splash -a ! -e "${CHROOT}/dev/tty1" ]
then
	bad_msg "ERROR: your real /dev is missing tty1, required for splash"
fi

# Run debug shell if requested
rundebugshell "before entering switch_root"

exec /sbin/switch_root -c "/dev/console" "${CHROOT}" \
	"${REAL_INIT:-/sbin/init}" "${INIT_OPTS}"

# If we get here, something bad has happened
splashcmd verbose

bad_msg "A fatal error has occured since ${REAL_INIT:-/sbin/init} did not"
bad_msg "boot correctly. Trying to open a shell..."

exec /bin/bash
exec /bin/sh
exec /bin/ash
exec /bin/dash
exec sh