#!/bin/busybox ash # Install busybox's applets as symlinks /bin/busybox --install -s . /init_functions msg ":: Loading Initramfs" /bin/mount -t proc proc /proc /bin/mount -t sysfs sys /sys read CMDLINE </proc/cmdline export CMDLINE export root="" export init="" echo "/sbin/modprobe" > /proc/sys/kernel/modprobe # if available, start udevd at this stage if [ -x /sbin/udevd ]; then msg ":: Starting udevd..." echo > /proc/sys/kernel/hotplug /sbin/udevd --daemon --resolve-names=never msg "done." fi for cmd in ${CMDLINE}; do case "${cmd}" in \#*) break ;; # ignore everything after a # in the commandline # The kernel passes those to the kernel on its own [0123456Ss]) ;; [0-9]*) ;; single) ;; rw) readwrite="yes" ;; ro) readwrite="no" ;; # only export stuff that does work with ash :) *=*) rhs="$(echo "${cmd}" | cut -d= -f2-)" cmd="$(echo "${cmd}" | cut -d= -f1 | sed 's|\.|_|g')" cmd="$(echo "${cmd}" | sed 's|-|_|g')=${rhs}" (echo "${cmd}" | grep -qe '^[0-9]') || export "${cmd}" ;; *) cmd="$(echo "${cmd}" | sed 's|\.|_|g')" cmd="$(echo "${cmd}" | sed 's|-|_|g')" (echo "${cmd}" | grep -qe '^[0-9]') || export "${cmd}=y" ;; esac done if [ -n "${disablehooks}" ]; then for d in $(echo "${disablehooks}" | sed 's|,| |g'); do export "hook_${d}=disabled" done fi if [ -n "${disablemodules}" ]; then for d in $(echo "${disablemodules}" | sed 's|,| |g'); do export "mod_${d}=disabled" done fi if [ -n "${earlymodules}" ]; then for m in $(echo "${earlymodules}" | sed 's|,| |g'); do /sbin/modprobe -q ${m} > /dev/null 2>&1 done fi . /config for m in ${MODULES}; do TST="" eval "TST=\$mod_${m}" if [ "${TST}" != "disabled" ]; then /sbin/modprobe -q ${m} > /dev/null 2>&1 fi done # If rootdelay is empty or not a non-negative integer, set it to 10 if [ -z "${rootdelay}" ] || ! [ "${rootdelay}" -ge 0 ]; then export rootdelay=10 fi if [ -e "/hooks" ]; then for h in ${HOOKS}; do TST="" eval "TST=\$hook_${h}" if [ "${TST}" != "disabled" ]; then run_hook () { msg "${h}: no run function defined"; } if [ -e "/hooks/${h}" ]; then . /hooks/${h} msg ":: Running Hook [${h}]" run_hook fi fi done fi if [ "${break}" = "y" ]; then echo ":: Break requested, type 'exit' to resume operation" launch_interactive_shell fi if [ -f "/message" ]; then msg "$(cat /message)" fi #Special handling if udev is running udevpid=$(/bin/pidof udevd) if [ -n "${udevpid}" ]; then # Settle pending uevents, then kill udev /sbin/udevadm settle /bin/kill -9 ${udevpid} > /dev/null 2>&1 /bin/sleep 0.01 fi mkdir -p /new_root if [ -z "${nfsroot}" -a "${root}" != "/dev/nfs" ]; then if [ ${root:0:5} != "/dev/" ] || ! poll_device "${root}" ${rootdelay}; then msg "\nRoot device '${root}' doesn't exist. Attempting to create it." rootdev="" if [ ${root:0:5} = "/dev/" ]; then # It might be a block device (/dev/sda) if [ -f /sys/block/${root:5}/dev ]; then rootdev="$(cat /sys/block/${root:5}/dev | sed 's|:| |')" # It might be a partition on any block device (/dev/sda1) else for dir in /sys/block/*; do if [ -f ${dir}/${root:5}/dev ]; then rootdev="$(cat ${dir}/${root:5}/dev | sed 's|:| |')" break fi done fi # It might be a major/minor pair (8:1) elif echo ${root} | grep -q :; then rootdev="$(echo ${root} | sed 's|:| |')" root="/dev/root" # It might be major/minor encoded as a single hex-number (lilo-style) (801) elif [ ${#root} -le 4 -a ${#root} -gt 2 ] && echo "${root}" | grep -qe '^[A-Fa-f0-9]*$'; then str_offset=$((${#root}-2)) major=$(printf "%d" 0x${root:0:${str_offset}}) minor=$(printf "%d" 0x${root:${str_offset}}) rootdev="${major} ${minor}" root="/dev/root" fi if [ -n "${rootdev}" ]; then msg "Creating root device ${root} with major $(echo "${rootdev}" | cut -d\ -f1) and minor $(echo "${rootdev}" | cut -d\ -f2)." mknod ${root} b ${rootdev} else err "Unable to determine major/minor number of root device '${root}'." echo "You are being dropped to a recovery shell" echo " Type 'exit' to try and continue booting" launch_interactive_shell msg "Trying to continue (this will most likely fail) ..." fi fi # We didn't build filesystem support into busybox, # instead we use util-linux-ng's blkid for best compatibility if [ -n "${rootfstype}" ]; then fstype="${rootfstype}" else fstype=$(eval $(/sbin/blkid -o udev -p "${root}"); echo $ID_FS_TYPE) fi if [ "${readwrite}" = "yes" ]; then rwopt="rw" else rwopt="ro" fi mount ${fstype:+-t ${fstype}} -o ${rwopt}${rootflags:+,${rootflags}} "${root}" /new_root else if [ -z "$nfs_server" -o -z "$nfs_path" ]; then err "Unable to mount root filesystem over NFS: wrong parameters." echo "You are being dropped to a recovery shell" echo " Type 'exit' to try and continue booting" launch_interactive_shell msg "Trying to continue (this will most likely fail) ..." fi nfsmount ${nfs_option:+-o ${nfs_option}} "${nfs_server}:${nfs_path}" /new_root fi umount /proc umount /sys [ -z "${init}" ] && init="/sbin/init" exec /sbin/switch_root -c /dev/console /new_root ${init} "$@"