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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}
local mntcmd=$(fstabinfo --mount-cmd "${RC_LIBDIR}")
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"
fsopts="${fsopts},mode=0755,size=${svcsize}k"
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
# If we have no entry in fstab for $svcdir, provide our own
if [ -z "${mntcmd}" ] ; then
mntcmd="-t ${fs} ${fsopts} ${devdir} ${RC_SVCDIR}"
fi
local dotmp=false
if [ -e "${RC_SVCDIR}"/deptree ] ; then
dotmp=true
try mount -n -t "${fs}" -o rw "${devtmp}" "${RC_LIBDIR}"/tmp
cp -p "${RC_SVCDIR}"/deptree "${RC_SVCDIR}"/nettree \
"${RC_LIBDIR}"/tmp 2>/dev/null
fi
try mount -n ${mntcmd}
if ${dotmp} ; then
cp -p "${RC_LIBDIR}"/tmp/deptree "${RC_LIBDIR}"/tmp/nettree \
"${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 $?
}
# Try and set a font as early as we can
ttydev=${CONSOLE:-/dev/tty1}
if [ -c "${ttydev}" ] ; then
ttydev="-C ${ttydev}"
else
[ -c /dev/vc/1 ] && ttydev="-C /dev/vc/1" || ttydev=
fi
[ -r "${RC_LIBDIR}"/console/font ] \
&& /bin/setfont ${ttydev} "${RC_LIBDIR}"/console/font
[ -r "${RC_LIBDIR}"/console/map ] \
&& /bin/setfont ${ttydev} -m "${RC_LIBDIR}"/console/map
[ -r "${RC_LIBDIR}"/console/unimap ] \
&& /bin/setfont ${ttydev} -u "${RC_LIBDIR}"/console/unimap
unset ttydev
. /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
${RC_DMESG_LEVEL+/bin/dmesg -n ${RC_DMESG_LEVEL}}
check_statedir /proc
# By default VServer already has /proc mounted, but OpenVZ does not!
if [ ! -e /proc/self/stat ] ; then
procfs="proc"
[ "${RC_UNAME}" = "GNU/kFreeBSD" ] && proc="linprocfs"
ebegin "Mounting ${procfs} at /proc"
mntcmd="$(fstabinfo --mount-cmd /proc)"
try mount -n ${mntcmd:--t ${procfs} -o noexec,nosuid,nodev proc /proc}
eend $?
fi
# Read off the kernel commandline to see if there's any special settings
# especially check to see if we need to set the CDBOOT environment variable
# Note: /proc MUST be mounted
if [ -r /sbin/livecd-functions.sh ] ; then
. /sbin/livecd-functions.sh
livecd_read_commandline
fi
[ "$(KV_to_int "$(uname -r)")" -ge "$(KV_to_int "2.6.0")" ]
K26=$?
if [ "${RC_UNAME}" != "GNU/kFreeBSD" -a "${RC_NAME}" != "VPS" -a "${K26}" = "0" ] ; then
if [ -d /sys ] ; then
ebegin "Mounting sysfs at /sys"
mntcmd="$(fstabinfo --mount-cmd /sys)"
try mount -n ${mntcmd:--t sysfs -o noexec,nosuid,nodev sysfs /sys}
eend $?
else
ewarn "No /sys to mount sysfs needed in 2.6 and later kernels!"
fi
fi
check_statedir /dev
devfs_mounted=
if [ -e /dev/.devfsd ] ; then
# make sure devfs is actually mounted and it isnt a bogus file
devfs_mounted=$(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
fellback_to_devfs="no"
case "${RC_DEVICES}" in
devfs) devfs="yes"
udev="no"
;;
udev) devfs="yes"
udev="yes"
fellback_to_devfs="yes"
;;
auto|*) devfs="yes"
udev="yes"
;;
esac
# Check udev prerequisites and kernel params
if [ "${udev}" = "yes" ] ; then
if get_bootparam "noudev" || ! has_addon udev-start || \
[ -n "${devfs_mounted}" -o "${K26}" != 0 ] ; then
udev="no"
fi
fi
# Check devfs prerequisites and kernel params
if [ "${devfs}" = "yes" ] ; then
if get_bootparam "nodevfs" || ! has_addon devfs-start ||
[ "${udev}" = "yes" -o ! -r /proc/filesystems ] ; then
devfs="no"
elif ! grep -Eq "[[:space:]]+devfs$" /proc/filesystems ; then
devfs="no"
fi
fi
# Actually start setting up /dev now
if [ "${udev}" = "yes" ] ; then
start_addon udev
# With devfs, /dev can be mounted by the kernel ...
elif [ "${devfs}" = "yes" ] ; then
start_addon devfs
# Did the user want udev in the config file but for
# some reason, udev support didnt work out ?
if [ "${fellback_to_devfs}" = "yes" ] ; then
ewarn "You wanted udev but support for it was not available!"
ewarn "Please review your system after it's booted!"
fi
fi
# OK, if we got here, things are probably not right :)
if [ "${devfs}" = "no" -a "${udev}" = "no" ] ; then
:
fi
fi
# From linux-2.6 we need to mount /dev/pts again ...
if [ "${RC_UNAME}" != "GNU/kFreeBSD" -a "${K26}" = "0" ] ; then
if grep -Eq "[[:space:]]+devpts$" /proc/filesystems && \
! mountinfo /dev/pts > /dev/null ; then
if [ ! -d /dev/pts ] && \
[ "${devfs}" = "yes" -o "${udev}" = "yes" ] ; then
# Make sure we have /dev/pts
mkdir -p /dev/pts >/dev/null 2>/dev/null || \
ewarn "Could not create /dev/pts!"
fi
if [ -d /dev/pts ] ; then
ebegin "Mounting devpts at /dev/pts"
mntcmd="$(fstabinfo --mount-cmd /dev/pts)"
try mount -n ${mntcmd:--t devpts -o gid=5,mode=0620,noexec,nosuid devpts /dev/pts}
eend $?
fi
fi
fi
# If booting off CD, we want to update inittab before setting the runlevel
if [ -f /sbin/livecd-functions.sh -a -n "${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 :
|
