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409 lines
11 KiB
409 lines
11 KiB
#!/bin/sh |
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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*- |
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# ex: ts=8 sw=4 sts=4 et filetype=sh |
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# |
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# Licensed under the GPLv2 |
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# |
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# Copyright 2008-2010, Red Hat, Inc. |
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# Harald Hoyer <harald@redhat.com> |
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# Jeremy Katz <katzj@redhat.com> |
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wait_for_loginit() |
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{ |
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if getargbool 0 rd.debug -y rdinitdebug -y rdnetdebug; then |
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set +x |
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echo "DRACUT_LOG_END" |
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exec 0<>/dev/console 1<>/dev/console 2<>/dev/console |
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# wait for loginit |
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i=0 |
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while [ $i -lt 10 ]; do |
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if [ -e /run/initramfs/init.log.end ]; then |
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j=$(jobs) |
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[ -z "$j" ] && break |
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[ -z "${j##*Running*}" ] || break |
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fi |
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sleep 0.1 |
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i=$(($i+1)) |
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done |
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[ $i -eq 10 ] && kill %1 >/dev/null 2>&1 |
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while pidof -x /sbin/loginit >/dev/null 2>&1; do |
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for pid in $(pidof -x /sbin/loginit); do |
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kill $HARD $pid >/dev/null 2>&1 |
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done |
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HARD="-9" |
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done |
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set -x |
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fi |
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rm -f /run/initramfs/initlog.pipe /run/initramfs/init.log.end |
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} |
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emergency_shell() |
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{ |
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set +e |
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if [ "$1" = "-n" ]; then |
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_rdshell_name=$2 |
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shift 2 |
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else |
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_rdshell_name=dracut |
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fi |
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echo ; echo |
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warn $@ |
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source_hook emergency |
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echo |
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wait_for_loginit |
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[ -e /.die ] && exit 1 |
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if getargbool 1 rd.shell -y rdshell || getarg rd.break rdbreak; then |
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echo "Dropping to debug shell." |
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echo |
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export PS1="$_rdshell_name:\${PWD}# " |
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[ -e /.profile ] || echo "exec 0<>/dev/console 1<>/dev/console 2<>/dev/console" > /.profile |
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sh -i -l |
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else |
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warn "Boot has failed. To debug this issue add \"rdshell\" to the kernel command line." |
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# cause a kernel panic |
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exit 1 |
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fi |
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} |
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OLD_PATH="$PATH" |
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export PATH=/sbin:/bin:/usr/sbin:/usr/bin |
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NEWROOT="/sysroot" |
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trap "emergency_shell Signal caught!" 0 |
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RDDEBUG="" |
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. /lib/dracut-lib.sh |
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[ -c /dev/null ] || mknod -m 0666 /dev/null c 1 3 |
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# mount some important things |
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mount -t proc -o nosuid,noexec,nodev /proc /proc >/dev/null 2>&1 |
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mount -t sysfs -o nosuid,noexec,nodev /sys /sys >/dev/null 2>&1 |
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if [ -x /lib/systemd/systemd-timestamp ]; then |
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RD_TIMESTAMP=$(/lib/systemd/systemd-timestamp) |
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else |
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read RD_TIMESTAMP _tmp < /proc/uptime |
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unset _tmp |
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fi |
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if [ ! -c /dev/ptmx ]; then |
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# try to mount devtmpfs |
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if ! mount -t devtmpfs -o mode=0755,nosuid udev /dev >/dev/null 2>&1; then |
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# if it failed fall back to normal tmpfs |
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mount -t tmpfs -o mode=0755,nosuid udev /dev >/dev/null 2>&1 |
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# Make some basic devices first, let udev handle the rest |
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mknod -m 0666 /dev/null c 1 3 |
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mknod -m 0666 /dev/ptmx c 5 2 |
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mknod -m 0600 /dev/console c 5 1 |
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mknod -m 0660 /dev/kmsg c 1 11 |
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fi |
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fi |
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# prepare the /dev directory |
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ln -s /proc/self/fd /dev/fd >/dev/null 2>&1 |
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ln -s /proc/self/fd/0 /dev/stdin >/dev/null 2>&1 |
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ln -s /proc/self/fd/1 /dev/stdout >/dev/null 2>&1 |
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ln -s /proc/self/fd/2 /dev/stderr >/dev/null 2>&1 |
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mkdir -m 0755 /dev/shm /dev/pts /run |
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mount -t devpts -o gid=5,mode=620,noexec,nosuid devpts /dev/pts >/dev/null 2>&1 |
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mount -t tmpfs -o mode=1777,nosuid,nodev tmpfs /dev/shm >/dev/null 2>&1 |
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# create /run which will obsolete /var/run |
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mount -t tmpfs -o mode=0755,nodev,noexec,nosuid tmpfs /run >/dev/null 2>&1 |
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mkdir -m 0755 /run/initramfs |
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UDEVVERSION=$(udevadm --version) |
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if [ $UDEVVERSION -gt 166 ]; then |
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# newer versions of udev use /run/udev/rules.d |
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mkdir -m 0755 /run/udev /run/udev/rules.d |
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export UDEVRULESD=/run/udev/rules.d |
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else |
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mkdir -m 0755 /dev/.udev /dev/.udev/rules.d |
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export UDEVRULESD=/dev/.udev/rules.d |
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fi |
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[ -e /var/run ] && mv /var/run /var/run.bak |
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[ -e /var/lock ] && mv /var/lock /var/lock.bak |
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ln -fs /run /var/run |
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mkdir -m 0755 /run/lock |
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ln -fs /run/lock /var/lock |
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# copy over any possible directory structure |
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cp -ar /var/run.bak/* /run/ 2>/dev/null |
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cp -ar /var/lock.bak/* /run/lock/ 2>/dev/null |
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if getargbool 0 rd.debug -y rdinitdebug -y rdnetdebug; then |
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getarg quiet && DRACUT_QUIET="yes" |
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mkfifo /run/initramfs/initlog.pipe |
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/sbin/loginit $DRACUT_QUIET </run/initramfs/initlog.pipe >/dev/console 2>&1 & |
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exec >/run/initramfs/initlog.pipe 2>&1 |
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else |
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exec 0<>/dev/console 1<>/dev/console 2<>/dev/console |
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fi |
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setdebug |
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source_conf /etc/conf.d |
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# run scriptlets to parse the command line |
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getarg 'rd.break=cmdline' 'rdbreak=cmdline' && emergency_shell -n cmdline "Break before cmdline" |
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source_hook cmdline |
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[ -z "$root" ] && die "No or empty root= argument" |
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[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'" |
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# Network root scripts may need updated root= options, |
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# so deposit them where they can see them (udev purges the env) |
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{ |
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echo "root='$root'" |
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echo "rflags='$rflags'" |
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echo "fstype='$fstype'" |
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echo "netroot='$netroot'" |
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echo "NEWROOT='$NEWROOT'" |
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} > /tmp/root.info |
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# pre-udev scripts run before udev starts, and are run only once. |
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getarg 'rd.break=pre-udev' 'rdbreak=pre-udev' && emergency_shell -n pre-udev "Break before pre-udev" |
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source_hook pre-udev |
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# start up udev and trigger cold plugs |
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udevd --daemon --resolve-names=never |
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UDEV_LOG_PRIO_ARG=--log-priority |
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UDEV_QUEUE_EMPTY="udevadm settle --timeout=0" |
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if [ $UDEVVERSION -lt 140 ]; then |
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UDEV_LOG_PRIO_ARG=--log_priority |
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UDEV_QUEUE_EMPTY="udevadm settle --timeout=1" |
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fi |
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getargbool 0 rd.udev.info -y rdudevinfo && udevadm control $UDEV_LOG_PRIO_ARG=info |
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getargbool 0 rd.udev.debug -y rdudevdebug && udevadm control $UDEV_LOG_PRIO_ARG=debug |
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getarg 'rd.break=pre-trigger' 'rdbreak=pre-trigger' && emergency_shell -n pre-trigger "Break before pre-trigger" |
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source_hook pre-trigger |
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# then the rest |
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udevadm trigger --action=add $udevtriggeropts >/dev/null 2>&1 |
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getarg 'rd.break=initqueue' 'rdbreak=initqueue' && emergency_shell -n initqueue "Break before initqueue" |
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RDRETRY=$(getarg rd.retry 'rd_retry=') |
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RDRETRY=${RDRETRY:-20} |
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RDRETRY=$(($RDRETRY*2)) |
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i=0 |
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while :; do |
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check_finished && break |
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udevsettle |
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check_finished && break |
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if [ -f $hookdir/initqueue/work ]; then |
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rm $hookdir/initqueue/work |
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fi |
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for job in $hookdir/initqueue/*.sh; do |
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[ -e "$job" ] || break |
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job=$job . $job |
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check_finished && break 2 |
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done |
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$UDEV_QUEUE_EMPTY >/dev/null 2>&1 || continue |
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for job in $hookdir/initqueue/settled/*.sh; do |
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[ -e "$job" ] || break |
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job=$job . $job |
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check_finished && break 2 |
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done |
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$UDEV_QUEUE_EMPTY >/dev/null 2>&1 || continue |
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# no more udev jobs and queues empty. |
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sleep 0.5 |
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# dirty hack for some cdrom drives, |
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# which report no medium for quiet |
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# some time. |
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for cdrom in /sys/block/sr*; do |
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[ -e "$cdrom" ] || continue |
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# skip, if cdrom medium was already found |
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strstr "$(udevadm info --query=env --path=${cdrom##/sys})" \ |
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ID_CDROM_MEDIA && continue |
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if [ -e "$cdrom"/events_poll_msecs -a ! -e "/tmp/.poll_${cdrom##*/}" ]; then |
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msecs=$(while read a; do echo $a;done < "$cdrom"/events_poll_msecs) |
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if [ "$msecs" = "-1" ]; then |
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echo 250 > "$cdrom"/events_poll_msecs |
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> "/tmp/.poll_${cdrom##*/}" |
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fi |
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else |
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echo change > "$cdrom/uevent" |
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fi |
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done |
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i=$(($i+1)) |
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[ $i -gt $RDRETRY ] \ |
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&& { flock -s 9 ; emergency_shell "No root device \"$root\" found"; } 9>/.console_lock |
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done |
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unset job |
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unset queuetriggered |
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# reset cdrom polling |
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for cdrom in /sys/block/sr*; do |
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[ -e "$cdrom" ] || continue |
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if [ -e "$cdrom"/events_poll_msecs ]; then |
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echo -1 > "$cdrom"/events_poll_msecs |
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fi |
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done |
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# pre-mount happens before we try to mount the root filesystem, |
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# and happens once. |
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getarg 'rd.break=pre-mount' 'rdbreak=pre-mount' && emergency_shell -n pre-mount "Break pre-mount" |
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source_hook pre-mount |
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getarg 'rd.break=mount' 'rdbreak=mount' && emergency_shell -n mount "Break mount" |
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# mount scripts actually try to mount the root filesystem, and may |
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# be sourced any number of times. As soon as one suceeds, no more are sourced. |
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i=0 |
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while :; do |
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[ -d "$NEWROOT/proc" ] && break; |
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for f in $hookdir/mount/*.sh; do |
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[ -f "$f" ] && . "$f" |
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[ -d "$NEWROOT/proc" ] && break; |
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done |
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i=$(($i+1)) |
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[ $i -gt 20 ] \ |
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&& { flock -s 9 ; emergency_shell "Can't mount root filesystem"; } 9>/.console_lock |
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done |
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{ |
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echo -n "Mounted root filesystem " |
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while read dev mp rest; do [ "$mp" = "$NEWROOT" ] && echo $dev; done < /proc/mounts |
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} | vinfo |
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# pre pivot scripts are sourced just before we switch over to the new root. |
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getarg 'rd.break=pre-pivot' 'rdbreak=pre-pivot' && emergency_shell -n pre-pivot "Break pre-pivot" |
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source_hook pre-pivot |
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# by the time we get here, the root filesystem should be mounted. |
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# Try to find init. |
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for i in "$(getarg real_init=)" "$(getarg init=)" /sbin/init /etc/init /init /bin/sh; do |
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[ -n "$i" ] || continue |
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if ! [ -d "$NEWROOT$i" ] && [ -L "$NEWROOT$i" -o -x "$NEWROOT$i" ]; then |
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INIT="$i" |
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break |
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fi |
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done |
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[ "$INIT" ] || { |
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echo "Cannot find init!" |
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echo "Please check to make sure you passed a valid root filesystem!" |
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emergency_shell |
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} |
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getarg rd.break rdbreak && emergency_shell -n switch_root "Break before switch_root" |
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# stop udev queue before killing it |
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udevadm control --stop-exec-queue |
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HARD="" |
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while pidof udevd >/dev/null 2>&1; do |
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for pid in $(pidof udevd); do |
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kill $HARD $pid >/dev/null 2>&1 |
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done |
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HARD="-9" |
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done |
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# Clean up the environment |
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for i in $(export -p); do |
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i=${i#declare -x} |
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i=${i#export} |
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# skip RD_ vars |
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[ "$i" != "${i#RD_}" ] && continue |
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i=${i%%=*} |
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[ "$i" = "root" -o "$i" = "PATH" -o "$i" = "HOME" -o "$i" = "TERM" ] || unset $i |
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done |
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initargs="" |
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read CLINE </proc/cmdline |
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if getarg init= >/dev/null ; then |
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ignoreargs="console BOOT_IMAGE" |
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# only pass arguments after init= to the init |
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CLINE=${CLINE#*init=} |
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set $CLINE |
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shift |
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for x in "$@"; do |
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for s in $ignoreargs; do |
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[ "${x%%=*}" = $s ] && continue 2 |
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done |
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initargs="$initargs $x" |
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done |
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unset CLINE |
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else |
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set $CLINE |
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shift |
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for x in "$@"; do |
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case "$x" in |
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[0-9]|s|S|single|emergency|auto ) \ |
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initargs="$initargs $x" |
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;; |
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esac |
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done |
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fi |
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# Debug: Copy state |
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if getargbool 0 rd.copystate -y rdcopystate; then |
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cp -axr /tmp/* /run/initramfs/ >/dev/null 2>&1 |
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fi |
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if getargbool 1 rd.timestamp; then |
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export RD_TIMESTAMP |
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else |
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unset RD_TIMESTAMP |
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fi |
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info "Switching root" |
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wait_for_loginit |
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if [ -d "$NEWROOT"/run ]; then |
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mount --move /run "$NEWROOT"/run |
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else |
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if [ -e /run/initramfs ]; then |
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cp -axr /run/initramfs /dev/.initramfs >/dev/null 2>&1 |
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if [ -e /run/initramfs/live ]; then |
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mkdir -m 0755 /dev/.initramfs/live |
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mount --move /run/initramfs/live /dev/.initramfs/live |
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fi |
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fi |
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umount -l /run |
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fi |
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export PATH="$OLD_PATH" |
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if [ -f /etc/capsdrop ]; then |
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. /etc/capsdrop |
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info "Calling $INIT with capabilities $CAPS_INIT_DROP dropped." |
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unset RD_DEBUG |
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exec /usr/sbin/capsh --drop="$CAPS_INIT_DROP" -- -c "exec /sbin/switch_root \"$NEWROOT\" \"$INIT\" $initargs" || { |
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warn "Command:" |
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warn capsh --drop=$CAPS_INIT_DROP -- -c exec switch_root "$NEWROOT" "$INIT" $initargs |
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warn "failed." |
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emergency_shell |
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} |
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else |
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unset RD_DEBUG |
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exec /sbin/switch_root "$NEWROOT" "$INIT" $initargs || { |
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warn "Something went very badly wrong in the initramfs. Please " |
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warn "file a bug against dracut." |
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emergency_shell |
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} |
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fi
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