diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init | 149 |
1 files changed, 93 insertions, 56 deletions
@@ -1,25 +1,25 @@ -#!/bin/sh +#!/bin/busybox ash +# Install busybox's applets as symlinks +/bin/busybox --install -s . /init_functions msg ":: Loading Initramfs" - -/bin/mount -t sysfs none /sys -/bin/mount -t proc none /proc +/bin/mount -t proc proc /proc +/bin/mount -t sysfs sys /sys read CMDLINE </proc/cmdline export CMDLINE -# Used so hooks can override params to kinit -export kinit_params="" 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 + /sbin/udevd --daemon --resolve-names=never msg "done." fi @@ -30,34 +30,35 @@ for cmd in ${CMDLINE}; do [0123456Ss]) ;; [0-9]*) ;; single) ;; - #Allow "init=X" to pass-through - init=*) kinit_params="${kinit_params} ${cmd}" ;; - # only export stuff that does work with dash :) - *=*) cmd="$(replace -s= "${cmd}" '.' '_')" - cmd="$(replace -s= "${cmd}" '-' '_')" - export "${cmd}" + 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 "${cmd}=y" ;; - *) cmd="$(replace "${cmd}" '.' '_')" - cmd="$(replace "${cmd}" '-' '_')" - export "${cmd}=y" - ;; esac done if [ -n "${disablehooks}" ]; then - for d in $(replace "${disablehooks}" ','); do + for d in $(echo "${disablehooks}" | sed 's|,| |g'); do export "hook_${d}=disabled" done fi if [ -n "${disablemodules}" ]; then - for d in $(replace "${disablemodules}" ','); do + for d in $(echo "${disablemodules}" | sed 's|,| |g'); do export "mod_${d}=disabled" done fi if [ -n "${earlymodules}" ]; then - for m in $(replace "${earlymodules}" ','); do + for m in $(echo "${earlymodules}" | sed 's|,| |g'); do /sbin/modprobe -q ${m} > /dev/null 2>&1 done fi @@ -76,8 +77,6 @@ done if [ -z "${rootdelay}" ] || ! [ "${rootdelay}" -ge 0 ]; then export rootdelay=10 fi -# We'll wait for the root device, so make sure klibc doesn't -export kinit_params="${kinit_params} rootdelay=0" if [ -e "/hooks" ]; then for h in ${HOOKS}; do @@ -96,49 +95,87 @@ fi if [ "${break}" = "y" ]; then echo ":: Break requested, type 'exit' to resume operation" - echo " NOTE: klibc contains no 'ls' binary, use 'echo *' instead" - PS1="ramfs$ " /bin/sh -i -fi - -# If we boot from NFS, don't check for a block device in /dev -# Let kinit do it all -if [ -z "${nfsroot}" -a "${root}" != "/dev/nfs" ]; then - if ! poll_device "${root}" ${rootdelay}; then - msg "\nRoot device '${root}' doesn't exist, attempting to create it" - - eval $(/bin/parseblock "${root}") - if [ -z "${BLOCKDEVICE}" ]; then - echo "ERROR: Failed to parse block device ids for '${root}'" - else - echo "/bin/mknod /dev/root b ${BLOCKDEVICE}" - /bin/mknod /dev/root b ${BLOCKDEVICE} >/dev/null - export root="/dev/root" - fi - if [ ! -b "${root}" -a ! -h "${root}" ]; then - err "Unable to detect or create root device '${root}'" - echo "You are being dropped to a recovery shell" - echo " Type 'reboot' to reboot" - echo " Type 'exit' to try and continue booting" - echo "NOTE: klibc contains no 'ls' binary, use 'echo *' instead" - echo "" - echo "If the device '${root}' gets created while you are here," - echo "try adding 'rootdelay=10' or higher to the kernel command-line" - PS1="ramfs$ " /bin/sh -i - msg "Trying to continue (this will most likely fail)..." - fi - fi + launch_interactive_shell fi if [ -f "/message" ]; then msg "$(cat /message)" fi -msg ":: Initramfs Completed - control passing to kinit" #Special handling if udev is running -udevpid=$(/bin/minips -C udevd -o pid=) +udevpid=$(/bin/pidof udevd) if [ -n "${udevpid}" ]; then + # Settle pending uevents, then kill udev + /sbin/udevadm settle /bin/kill -9 ${udevpid} > /dev/null 2>&1 /bin/sleep 0.01 fi -exec /bin/kinit "$@" -- "root=${root}" ${kinit_params} > /dev/null 2>&1 +mkdir -p /new_root +if [ -z "${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 ${init} "$@" |