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# Copyright 1999-2006 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# Check to see if this is a livecd, if it is read the commandline
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# this mainly makes sure $CDBOOT is defined if it's a livecd
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[[ -f /sbin/livecd-functions.sh ]] && \
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source /sbin/livecd-functions.sh && \
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livecd_read_commandline
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# Reset pam_console permissions if we are actually using it
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if [[ -x /sbin/pam_console_apply && ! -c /dev/.devfsd && \
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-n $(grep -v -e '^[[:space:]]*#' /etc/pam.d/* | grep 'pam_console') ]]; then
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/sbin/pam_console_apply -r
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fi
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stop_addon devfs
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stop_addon udev
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# Try to unmount all tmpfs filesystems not in use, else a deadlock may
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# occure, bug #13599.
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umount -at tmpfs &>/dev/null
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if [[ -n $(swapon -s 2>/dev/null) ]]; then
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ebegin $"Deactivating swap"
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swapoff -a
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eend $?
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fi
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# Write a reboot record to /var/log/wtmp before unmounting
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halt -w &>/dev/null
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# Unmounting should use /proc/mounts and work with/without devfsd running
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# Credits for next function to unmount loop devices, goes to:
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#
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# Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
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# Modified for RHS Linux by Damien Neil
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#
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#
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# Unmount file systems, killing processes if we have to.
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# Unmount loopback stuff first
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# Use `umount -d` to detach the loopback device
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# Remove loopback devices started by dm-crypt
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remaining=$(gawk '!/^#/ && $1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts | \
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sort -r | grep -v '/newroot' | grep -v '/mnt/livecd')
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[[ -n ${remaining} ]] && {
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sig=
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retry=3
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while [[ -n ${remaining} && ${retry} -gt 0 ]]; do
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if [[ ${retry} -lt 3 ]]; then
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ebegin $"Unmounting loopback filesystems (retry)"
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umount -d ${remaining} &>/dev/null
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eend $? $"Failed to unmount filesystems this retry"
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else
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ebegin $"Unmounting loopback filesystems"
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umount -d ${remaining} &>/dev/null
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eend $? $"Failed to unmount filesystems"
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fi
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remaining=$(gawk '!/^#/ && $1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts | \
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sort -r | grep -v '/newroot' | grep -v '/mnt/livecd')
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[[ -z ${remaining} ]] && break
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/bin/fuser -s -k ${sig} -m ${remaining}
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sleep 5
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retry=$((${retry} - 1))
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sig=-9
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done
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}
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# Try to unmount all filesystems (no /proc,tmpfs,devfs,etc).
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# This is needed to make sure we dont have a mounted filesystem
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# on a LVM volume when shutting LVM down ...
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ebegin $"Unmounting filesystems"
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unmounts=$( \
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gawk '{ \
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if (($3 !~ /^(proc|devpts|sysfs|devfs|tmpfs|usb(dev)?fs)$/) && \
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($1 != "none") && \
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($1 !~ /^(rootfs|\/dev\/root)$/) && \
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($2 != "/")) \
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print $2 }' /proc/mounts | sort -ur)
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for x in ${unmounts}; do
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# Do not umount these if we are booting off a livecd
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if [[ -n ${CDBOOT} ]] && \
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[[ ${x} == "/mnt/cdrom" || ${x} == "/mnt/livecd" ]] ; then
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continue
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fi
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x=${x//\\040/ }
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if ! umount "${x}" &>/dev/null; then
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# If its /usr, just ignore it .. we will mount it ro below ...
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# This is to prevent killing bash on systems using locales.
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[[ ${x} == "/usr" ]] && continue
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# Kill processes still using this mount
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/bin/fuser -s -k -9 -m "${x}"
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sleep 2
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# Now try to unmount it again ...
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umount -f -r "${x}" &>/dev/null
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fi
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done
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eend 0
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# Try to remove any dm-crypt mappings
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stop_addon dm-crypt
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# Stop LVM, etc
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stop_volumes
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# This is a function because its used twice below
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ups_kill_power() {
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local UPS_CTL UPS_POWERDOWN
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if [[ -f /etc/killpower ]] ; then
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UPS_CTL=/sbin/upsdrvctl
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UPS_POWERDOWN="${UPS_CTL} shutdown"
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elif [[ -f /etc/apcupsd/powerfail ]] ; then
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UPS_CTL=/etc/apcupsd/apccontrol
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UPS_POWERDOWN="${UPS_CTL} killpower"
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else
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return 0
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fi
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if [[ -x ${UPS_CTL} ]] ; then
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ewarn $"Signalling ups driver(s) to kill the load!"
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${UPS_POWERDOWN}
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ewarn $"Halt system and wait for the UPS to kill our power"
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/sbin/halt -id
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while [ 1 ]; do sleep 60; done
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fi
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}
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mount_readonly() {
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local x=
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local retval=0
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local cmd=$1
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# Get better results with a sync and sleep
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sync; sync
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sleep 1
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for x in $(gawk '$1 != "none" { print $2 }' /proc/mounts | sort -ur) ; do
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x=${x//\\040/ }
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if [[ ${cmd} == "u" ]]; then
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umount -n -r "${x}"
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else
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mount -n -o remount,ro "${x}" &>/dev/null
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fi
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retval=$((${retval} + $?))
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done
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[[ ${retval} -ne 0 ]] && killall5 -9 &>/dev/null
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return ${retval}
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}
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# Since we use `mount` in mount_readonly(), but we parse /proc/mounts, we
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# have to make sure our /etc/mtab and /proc/mounts agree
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cp /proc/mounts /etc/mtab &>/dev/null
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ebegin $"Remounting remaining filesystems readonly"
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mount_worked=0
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if ! mount_readonly ; then
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if ! mount_readonly ; then
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# If these things really don't want to remount ro, then
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# let's try to force them to unmount
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if ! mount_readonly u ; then
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mount_worked=1
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fi
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fi
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fi
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eend ${mount_worked}
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if [[ ${mount_worked} -eq 1 ]]; then
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ups_kill_power
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single_user -t 10 /dev/console
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fi
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# Inform if there is a forced or skipped fsck
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if [[ -f /fastboot ]]; then
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echo
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ewarn $"Fsck will be skipped on next startup"
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elif [[ -f /forcefsck ]]; then
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echo
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ewarn $"A full fsck will be forced on next startup"
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fi
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ups_kill_power
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# vim:ts=4
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