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checkroot.sh
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#! /bin/sh ### BEGIN INIT INFO # Provides: checkroot mtab # Required-Start: mountdevsubfs hostname # Required-Stop: # Should-Start: keymap hwclockfirst hdparm bootlogd # Should-stop: # Default-Start: S # Default-Stop: # X-Interactive: true # Short-Description: Check to root file system. ### END INIT INFO # Include /usr/bin in path to find on_ac_power if /usr/ is on the root # partition. PATH=/sbin:/bin:/usr/bin FSCK_LOGFILE=/var/log/fsck/checkroot [ "$FSCKFIX" ] || FSCKFIX=no [ "$SULOGIN" ] || SULOGIN=no . /lib/init/vars.sh . /lib/lsb/init-functions . /lib/init/mount-functions.sh do_start () { # Trap SIGINT so that we can handle user interrupt of fsck. trap "" INT # # Set SULOGIN in /etc/default/rcS to yes if you want a sulogin to # be spawned from this script *before anything else* with a timeout, # like sysv does. # [ "$SULOGIN" = yes ] && sulogin -t 30 $CONSOLE KERNEL="$(uname -s)" MACHINE="$(uname -m)" read_fstab # # Activate the swap device(s) in /etc/fstab. This needs to be done # before fsck, since fsck can be quite memory-hungry. # ENABLE_SWAP=no case "$KERNEL" in Linux) if [ "$NOSWAP" = yes ] then [ "$VERBOSE" = no ] || log_warning_msg "Not activating swap as requested via bootoption noswap." ENABLE_SWAP=no else if [ "$swap_on_lv" = yes ] then [ "$VERBOSE" = no ] || log_warning_msg "Not activating swap on logical volume." elif [ "$swap_on_file" = yes ] then [ "$VERBOSE" = no ] || log_warning_msg "Not activating swap on swapfile." else ENABLE_SWAP=yes fi fi ;; *) ENABLE_SWAP=yes ;; esac if [ "$ENABLE_SWAP" = yes ] then if [ "$VERBOSE" = no ] then log_action_begin_msg "Activating swap" swapon -a -e >/dev/null 2>&1 log_action_end_msg $? else log_daemon_msg "Activating swap" swapon -a -v log_end_msg $? fi fi # # Does the root device in /etc/fstab match with the actual device ? # If not we try to use the /dev/root alias device, and if that # fails we create a temporary node in /run. # # Do this only on Linux. Neither kFreeBSD nor Hurd have # /dev/root and the device ids used here are specific to # Linux. KERNEL="$(uname)" if [ "$rootcheck" = yes ] && [ "$KERNEL" = Linux ] then ddev="$(mountpoint -qx $rootdev)" rdev="$(mountpoint -d /)" if [ "$ddev" != "$rdev" ] && [ "$ddev" != "4:0" ] then if [ "$(mountpoint -qx /dev/root)" = "4:0" ] then rootdev=/dev/root else if \ rm -f /run/rootdev \ && mknod -m 600 /run/rootdev b ${rdev%:*} ${rdev#*:} \ && [ -e /run/rootdev ] then rootdev=/run/rootdev else rootfatal=yes fi fi fi fi # # Bother, said Pooh. # if [ "$rootfatal" = yes ] then log_failure_msg "The device node $rootdev for the root filesystem is missing or incorrect or there is no entry for the root filesystem listed in /etc/fstab. The system is also unable to create a temporary node in /run. This means you have to fix the problem manually." log_warning_msg "A maintenance shell will now be started. CONTROL-D will terminate this shell and restart the system." # Start a single user shell on the console if ! sulogin $CONSOLE then log_failure_msg "Attempt to start maintenance shell failed. Will restart in 5 seconds." sleep 5 fi [ "$VERBOSE" = no ] || log_action_msg "Will now restart" reboot -f fi # See if we're on AC Power. If not, we're not gonna run our # check. If on_ac_power (in /usr/) is unavailable, behave as # before and check all file systems needing it. # Disabled AC power check until fsck can be told to only check the # file system if it is corrupt when running on battery. (bug #526398) # if which on_ac_power >/dev/null 2>&1 && [ "$rootcheck" = yes ] # then # on_ac_power >/dev/null 2>&1 # if [ "$?" -eq 1 ] # then # log_warning_msg "On battery power, so skipping file system check." # rootcheck=no # fi # fi # # See if we want to check the root file system. # FSCKCODE=0 if [ -e /run/initramfs/fsck-root ] then rootcheck=no fi if is_fastboot_active then [ "$rootcheck" = yes ] && log_warning_msg "Fast boot enabled, so skipping root file system check." rootcheck=no fi if which findmnt >/dev/null 2>&1 then if [ "$(findmnt -f -n -o FSTYPE /)" = "btrfs" ] then [ "$rootcheck" = yes ] && log_warning_msg "btrfs root detected, so skipping root file system check." rootcheck=no fi fi if [ "$rootcheck" = yes ] then # # Ensure that root is quiescent and read-only before fsck'ing. # # mount -n -o remount,ro / would be the correct syntax but # mount can get confused when there is a "bind" mount defined # in fstab that bind-mounts "/" somewhere else. # # So we use mount -n -o remount,ro $rootdev / but that can # fail on older kernels on sparc64/alpha architectures due # to a bug in sys_mount(). # # As a compromise we try both. # if \ ! mount -n -o remount,ro $rootdev / \ && ! mount -n -o remount,ro -t dummytype $rootdev / 2>/dev/null \ && ! mount -n -o remount,ro / 2>/dev/null then log_failure_msg "Cannot check root file system because it is not mounted read-only." rootcheck=no fi fi # # The actual checking is done here. # if [ "$rootcheck" = yes ] then if [ -f /forcefsck ] || grep -q -s -w -i "forcefsck" /proc/cmdline then force="-f" else force="" fi if [ "$FSCKFIX" = yes ] then fix="-y" else fix="-a" fi spinner="-C" case "$TERM" in dumb|network|unknown|"") spinner="" ;; esac # This Linux/s390x special case should go away. if [ "${KERNEL}:${MACHINE}" = Linux:s390x ] then spinner="" fi if [ "$VERBOSE" = no ] then log_action_begin_msg "Checking root file system" logsave -s $FSCK_LOGFILE fsck $spinner $force $fix -t $roottype $rootdev FSCKCODE=$? if [ "$FSCKCODE" = 0 ] then log_action_end_msg 0 else log_action_end_msg 1 "code $FSCKCODE" fi else log_daemon_msg "Will now check root file system" logsave -s $FSCK_LOGFILE fsck $spinner $force $fix -V -t $roottype $rootdev FSCKCODE=$? log_end_msg $FSCKCODE fi fi # # If there was a failure, drop into single-user mode. # # NOTE: "failure" is defined as exiting with a return code of # 4 or larger. A return code of 1 indicates that file system # errors were corrected but that the boot may proceed. A return # code of 2 or 3 indicates that the system should immediately reboot. # if [ "$FSCKCODE" -eq 32 ] then log_warning_msg "File system check was interrupted by user" elif [ "$FSCKCODE" -gt 3 ] then # Surprise! Re-directing from a HERE document (as in "cat << EOF") # does not work because the root is currently read-only. log_failure_msg "An automatic file system check (fsck) of the root filesystem failed. A manual fsck must be performed, then the system restarted. The fsck should be performed in maintenance mode with the root filesystem mounted in read-only mode." log_warning_msg "The root filesystem is currently mounted in read-only mode. A maintenance shell will now be started. After performing system maintenance, press CONTROL-D to terminate the maintenance shell and restart the system." # Start a single user shell on the console if ! sulogin $CONSOLE then log_failure_msg "Attempt to start maintenance shell failed. Will restart in 5 seconds." sleep 5 fi [ "$VERBOSE" = no ] || log_action_msg "Will now restart" reboot -f elif [ "$FSCKCODE" -gt 1 ] then log_failure_msg "The file system check corrected errors on the root partition but requested that the system be restarted." log_warning_msg "The system will be restarted in 5 seconds." sleep 5 [ "$VERBOSE" = no ] || log_action_msg "Will now restart" reboot -f fi # # Remount root to final mode (rw or ro). # # See the comments above at the previous "mount -o remount" # for an explanation why we try this twice. # if ! mount -n -o remount,$rootopts,$rootmode $fstabroot / 2>/dev/null then mount -n -o remount,$rootopts,$rootmode / fi # If possible, migrate /etc/mtab to be a symlink to # /proc/mounts. Note that not all systems e.g. Hurd currently # support this. if [ "$rootmode" != "ro" ]; then mtab_migrate fi if selinux_enabled && [ -x /sbin/restorecon ] && [ -r /etc/mtab ] then restorecon /etc/mtab fi # # Remove /run/rootdev if we created it. # rm -f /run/rootdev # Update mount options for mounts created in early boot # S01mountkernfs.sh /etc/init.d/mountkernfs.sh reload # S03mountdevsubfs.sh /etc/init.d/mountdevsubfs.sh reload } do_status () { # If / is read-write or swap is enabled, this script have done # its job. rootrw=false swapon=false if [ -f /etc/mtab ] ; then if grep " / " /etc/mtab |grep -q rw ; then rootrw=true fi fi if [ -f /proc/swaps ] ; then if [ "$(cat /proc/swaps |grep -v ^Filename)" ] ; then swapon=true fi fi if [ true = "$rootrw" ] || [ true = "$swapon" ] ; then return 0 else return 4 fi } case "$1" in start|"") do_start ;; restart|reload|force-reload) echo "Error: argument '$1' not supported" >&2 exit 3 ;; stop) # No-op ;; status) do_status exit $? ;; *) echo "Usage: checkroot.sh [start|stop]" >&2 exit 3 ;; esac :