406 lines
11 KiB
Bash
Executable File
406 lines
11 KiB
Bash
Executable File
#!/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 "$cdrom" ] || continue
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if [ -e "$cdrom"/events_poll_msecs ]; then
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msecs=$(while read a; do echo $a;done < "$cdrom"/events_poll_msecs)
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[ "$msecs" = "-1" ] && \
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echo 1000 > "$cdrom"/events_poll_msecs
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else
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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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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 $x"
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;;
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esac
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done
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fi
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# Debug: Copy state
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if getargbool 0 rd.copystate -y rdcopystate; then
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cp -axr /tmp/* /run/initramfs/ >/dev/null 2>&1
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fi
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if getargbool 1 rd.timestamp; then
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export RD_TIMESTAMP
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else
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unset RD_TIMESTAMP
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fi
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info "Switching root"
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wait_for_loginit
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export PATH="$OLD_PATH"
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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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mkdir -m 0755 /dev/.initramfs
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cp -axr /run/initramfs/* /dev/.initramfs >/dev/null 2>&1
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fi
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if [ -e /run/mdadm ]; then
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mkdir -m 0755 /dev/.mdadm
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cp -axr /run/mdadm/* /dev/.mdadm >/dev/null 2>&1
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fi
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fi
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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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