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#!/bin/sh
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# void single_user()
#
# Drop to a shell, remount / ro, and then reboot
#
single_user() {
if [ "${RC_SYS}" = "VPS" ]; then
einfo "Halting"
halt -f
return
fi
sulogin ${CONSOLE}
einfo "Unmounting filesystems"
if [ -c /dev/null ]; then
mount -a -o remount,ro 2>/dev/null
else
mount -a -o remount,ro
fi
einfo "Rebooting"
reboot -f
}
# This basically mounts $svcdir as a ramdisk, but preserving its content
# which allows us to run depscan.sh
# The tricky part is finding something our kernel supports
# tmpfs and ramfs are easy, so force one or the other
mount_svcdir() {
local fs= fsopts="-o rw,noexec,nodev,nosuid" devdir="none" devtmp="none" x=
local svcsize=${svcsize:-1024}
if grep -Eq "[[:space:]]+tmpfs$" /proc/filesystems; then
fs="tmpfs"
fsopts="${fsopts},mode=0755,size=${svcsize}k"
elif grep -Eq "[[:space:]]+ramfs$" /proc/filesystems; then
fs="ramfs"
# ramfs has no special options
elif [ -e /dev/ram0 -a -e /dev/ram1 ] \
&& grep -Eq "[[:space:]]+ext2$" /proc/filesystems; then
devdir="/dev/ram0"
devtmp="/dev/ram1"
fs="ext2"
for x in ${devdir} ${devtmp}; do
try dd if=/dev/zero of="${x}" bs=1k count="${svcsize}"
try mkfs -t "${fs}" -i 1024 -vm0 "${x}" "${svcsize}"
done
else
echo
eerror "Gentoo Linux requires tmpfs, ramfs or 2 ramdisks + ext2"
eerror "compiled into the kernel"
echo
single_user
fi
local dotmp=false
if [ -e "${RC_SVCDIR}"/deptree ]; then
dotmp=true
try mount -n -t "${fs}" -o rw "${devtmp}" "${RC_LIBDIR}"/tmp
cp -p "${RC_SVCDIR}"/deptree "${RC_SVCDIR}"/depconfig \
"${RC_SVCDIR}"/nettree "${RC_LIBDIR}"/tmp 2>/dev/null
fi
# If we have no entry in fstab for $svcdir, provide our own
if fstabinfo --quiet "${RC_SVCDIR}"; then
try mount -n "${RC_SVCDIR}"
else
try mount -n -t "${fs}" ${fsopts} "${devdir}" "${RC_SVCDIR}"
fi
if ${dotmp}; then
cp -p "${RC_LIBDIR}"/tmp/deptree "${RC_LIBDIR}"/tmp/depconfig \
"${RC_LIBDIR}"/tmp/nettree "${RC_SVCDIR}" 2>/dev/null
try umount -n "${RC_LIBDIR}"/tmp
fi
}
_RC_GET_KV_CACHE=""
get_KV() {
[ -z "${_RC_GET_KV_CACHE}" ] \
&& _RC_GET_KV_CACHE="$(uname -r)"
echo "$(KV_to_int "${_RC_GET_KV_CACHE}")"
return $?
}
. /etc/init.d/functions.sh
. "${RC_LIBDIR}"/sh/init-functions.sh
. "${RC_LIBDIR}"/sh/rc-functions.sh
# Set the console loglevel to 1 for a cleaner boot
# the logger should anyhow dump the ring-0 buffer at start to the
# logs, and that with dmesg can be used to check for problems
if [ -n "${RC_DMESG_LEVEL}" -a "${RC_SYS}" != "VPS" ]; then
dmesg -n "${RC_DMESG_LEVEL}"
fi
check_statedir /proc
# By default VServer already has /proc mounted, but OpenVZ does not!
# However, some of our users have an old proc image in /proc
# NFC how they managed that, but the end result means we have to test if
# /proc actually works or not. We to this by comparing uptime to one a second
# ago
mountproc=true
if [ -e /proc/uptime ]; then
up="$(cat /proc/uptime)"
sleep 1
if [ "${up}" = "$(cat /proc/uptime)" ]; then
eerror "You have cruft in /proc that should be deleted"
else
einfo "/proc is already mounted, skipping"
mountproc=false
fi
unset up
fi
if ${mountproc} ; then
procfs="proc"
[ "${RC_UNAME}" = "GNU/kFreeBSD" ] && proc="linprocfs"
ebegin "Mounting ${procfs} at /proc"
if fstabinfo --quiet /proc; then
try mount -n /proc
else
try mount -n -t "${procfs}" -o noexec,nosuid,nodev proc /proc
fi
eend $?
fi
unset mountproc
# Read off the kernel commandline to see if there's any special settings
# especially check to see if we need to set the CDBOOT environment variable
# Note: /proc MUST be mounted
if [ -r /sbin/livecd-functions.sh ]; then
. /sbin/livecd-functions.sh
livecd_read_commandline
fi
[ "$(KV_to_int "$(uname -r)")" -ge "$(KV_to_int "2.6.0")" ]
K26=$?
if [ "${RC_UNAME}" != "GNU/kFreeBSD" -a "${RC_SYS}" != "VPS" -a "${K26}" = "0" ]; then
if [ -d /sys ]; then
if ! mountinfo --quiet /sys; then
ebegin "Mounting sysfs at /sys"
if fstabinfo --quiet /sys; then
try mount -n /sys
else
try mount -n -t sysfs -o noexec,nosuid,nodev sysfs /sys
fi
eend $?
fi
else
ewarn "No /sys to mount sysfs needed in 2.6 and later kernels!"
fi
fi
check_statedir /dev
devfs_mounted=
if [ -e /dev/.devfsd ]; then
# make sure devfs is actually mounted and it isnt a bogus file
devfs_mounted=$(mountinfo --fstype-regex devfs)
fi
# Try to figure out how the user wants /dev handled
# - check $RC_DEVICES from /etc/conf.d/rc
# - check boot parameters
# - make sure the required binaries exist
# - make sure the kernel has support
if [ "${RC_DEVICES}" = "static" -o "${RC_SYS}" = "VPS" ]; then
ebegin "Using existing device nodes in /dev"
eend 0
elif [ "${RC_UNAME}" = "GNU/kFreeBSD" ]; then
ebegin "Using kFreeBSD devfs in /dev"
eend 0
else
case ${RC_DEVICES} in
devfs) managers="devfs udev mdev";;
udev) managers="udev devfs mdev";;
mdev) managers="mdev udev devfs";;
auto|*) managers="udev devfs mdev";;
esac
for m in ${managers}; do
# Check common manager prerequisites and kernel params
if get_bootparam "no${m}" || ! has_addon ${m}-start; then
continue
fi
# Check specific manager prerequisites
case ${m} in
udev|mdev)
if [ -n "${devfs_mounted}" -o "${K26}" != 0 ]; then
continue
fi
;;
devfs)
grep -Eqs "[[:space:]]+devfs$" /proc/filesystems || continue
;;
esac
# Let's see if we can get this puppy rolling
start_addon ${m} && break
done
fi
# Mount required stuff as user may not have then in /etc/fstab
for x in "devpts /dev/pts" "tmpfs /dev/shm ,nodev"; do
set -- ${x}
grep -Eq "[[:space:]]+$1$" /proc/filesystems || continue
mountinfo -q "$2" && continue
if [ ! -d "$2" ] && \
[ "${devfs}" = "yes" -o "${udev}" = "yes" ]; then
mkdir -p "$2" >/dev/null 2>/dev/null || \
ewarn "Could not create $2!"
fi
if [ -d "$2" ]; then
ebegin "Mounting $1 at $2"
if fstabinfo --quiet "$2"; then
try mount -n "$2"
else
try mount -n -t "$1" -o gid=5,mode=0620,noexec,nosuid"$3" none "$2"
fi
eend $?
fi
done
# If booting off CD, we want to update inittab before setting the runlevel
if [ -f /sbin/livecd-functions.sh -a -n "${CDBOOT}" ]; then
ebegin "Updating inittab"
livecd_fix_inittab
eend $?
/sbin/telinit q &>/dev/null
fi
. "${RC_LIBDIR}"/sh/init-common-post.sh
# vim: set ts=4 :
|
