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