2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
3 # ex: ts=8 sw=4 sts=4 et filetype=sh
5 # Licensed under the GPLv2
7 # Copyright 2008-2010, Red Hat, Inc.
8 # Harald Hoyer <harald@redhat.com>
9 # Jeremy Katz <katzj@redhat.com>
11 export -p > /tmp/export.orig
16 [ "$RD_DEBUG" = "yes" ] || return
17 [ -e /run/initramfs/loginit.pipe ] || return
19 exec 0<>/dev/console 1<>/dev/console 2<>/dev/console
22 while [ $i -lt 10 ]; do
23 if [ ! -e /run/initramfs/loginit.pipe ]; then
26 [ -z "${j##*Running*}" ] || break
32 if [ $i -eq 10 ]; then
33 kill %1 >/dev/null 2>&1
34 kill $(while read line;do echo $line;done</run/initramfs/loginit.pid)
38 rm -f /run/initramfs/loginit.pipe /run/initramfs/loginit.pid
45 if [ "$1" = "-n" ]; then
56 [ -e /run/initramfs/.die ] && exit 1
57 if getargbool 1 rd.shell -y rdshell || getarg rd.break rdbreak; then
58 echo "Dropping to debug shell."
60 export PS1="$_rdshell_name:\${PWD}# "
61 [ -e /.profile ] || >/.profile
63 if [ -n "$(command -v setsid)" ]; then
64 _ctty="$(getarg rd.ctty=)" && _ctty="/dev/${_ctty##*/}"
65 [ -c "$_ctty" ] || _ctty=/dev/tty1
66 setsid sh -i -l 0<$_ctty 1>$_ctty 2>&1
67 elif [ -n "$(command -v openvt)" ] && ! getarg "console=" >/dev/null 2>&1 && getargbool 1 "rd.openvt" ; then
68 openvt -f -c 1 -w -s -l -- sh
70 sh -i -l 0<$_ctty 1>$_ctty 2>&1
73 warn "Boot has failed. To debug this issue add \"rdshell\" to the kernel command line."
74 # cause a kernel panic
80 [ -d $NEWROOT ] || mkdir -p -m 0755 $NEWROOT
82 trap "emergency_shell Signal caught!" 0
84 PATH=/usr/sbin:/usr/bin:/sbin:/bin
90 [ -c /dev/null ] || mknod -m 0666 /dev/null c 1 3
92 # mount some important things
93 [ ! -d /proc/self ] && \
94 mount -t proc -o nosuid,noexec,nodev proc /proc >/dev/null 2>&1
96 [ ! -d /sys/kernel ] && \
97 mount -t sysfs -o nosuid,noexec,nodev sysfs /sys >/dev/null 2>&1
99 if [ -x /lib/systemd/systemd-timestamp ]; then
100 RD_TIMESTAMP=$(/lib/systemd/systemd-timestamp)
102 read RD_TIMESTAMP _tmp < /proc/uptime
108 if [ "$RD_DEBUG" = "yes" ]; then
109 getarg quiet && DRACUT_QUIET="yes"
110 a=$(getarg loglevel=)
111 [ -n "$a" ] && [ $a -ge 8 ] && unset DRACUT_QUIET
114 if ! ismounted /dev; then
115 mount -t devtmpfs -o mode=0755,nosuid devtmpfs /dev >/dev/null
118 # prepare the /dev directory
119 [ ! -h /dev/fd ] && ln -s /proc/self/fd /dev/fd >/dev/null 2>&1
120 [ ! -h /dev/stdin ] && ln -s /proc/self/fd/0 /dev/stdin >/dev/null 2>&1
121 [ ! -h /dev/stdout ] && ln -s /proc/self/fd/1 /dev/stdout >/dev/null 2>&1
122 [ ! -h /dev/stderr ] && ln -s /proc/self/fd/2 /dev/stderr >/dev/null 2>&1
124 if ! ismounted /dev/pts; then
125 mkdir -m 0755 /dev/pts
126 mount -t devpts -o gid=5,mode=620,noexec,nosuid devpts /dev/pts >/dev/null
129 if ! ismounted /dev/shm; then
130 mkdir -m 0755 /dev/shm
131 mount -t tmpfs -o mode=1777,nosuid,nodev tmpfs /dev/shm >/dev/null
134 if ! ismounted /run; then
135 mkdir -m 0755 /newrun
136 mount -t tmpfs -o mode=0755,nosuid,nodev tmpfs /newrun >/dev/null
138 mount --move /newrun /run
142 [ -d /run/initramfs ] || mkdir -p -m 0755 /run/initramfs
144 UDEVVERSION=$(udevadm --version)
145 if [ $UDEVVERSION -gt 166 ]; then
146 # newer versions of udev use /run/udev/rules.d
147 export UDEVRULESD=/run/udev/rules.d
148 [ -d /run/udev ] || mkdir -p -m 0755 /run/udev
149 [ -d $UDEVRULESD ] || mkdir -p -m 0755 $UDEVRULESD
151 mkdir -m 0755 /dev/.udev /dev/.udev/rules.d
152 export UDEVRULESD=/dev/.udev/rules.d
155 if [ "$RD_DEBUG" = "yes" ]; then
156 mkfifo /run/initramfs/loginit.pipe
157 loginit $DRACUT_QUIET </run/initramfs/loginit.pipe >/dev/console 2>&1 &
158 exec >/run/initramfs/loginit.pipe 2>&1
160 exec 0<>/dev/console 1<>/dev/console 2<>/dev/console
163 source_conf /etc/conf.d
165 # run scriptlets to parse the command line
166 getarg 'rd.break=cmdline' 'rdbreak=cmdline' && emergency_shell -n cmdline "Break before cmdline"
169 [ -z "$root" ] && die "No or empty root= argument"
170 [ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
172 # Network root scripts may need updated root= options,
173 # so deposit them where they can see them (udev purges the env)
176 echo "rflags='$rflags'"
177 echo "fstype='$fstype'"
178 echo "netroot='$netroot'"
179 echo "NEWROOT='$NEWROOT'"
182 # pre-udev scripts run before udev starts, and are run only once.
183 getarg 'rd.break=pre-udev' 'rdbreak=pre-udev' && emergency_shell -n pre-udev "Break before pre-udev"
186 # start up udev and trigger cold plugs
187 udevd --daemon --resolve-names=never
189 UDEV_LOG_PRIO_ARG=--log-priority
190 UDEV_QUEUE_EMPTY="udevadm settle --timeout=0"
192 if [ $UDEVVERSION -lt 140 ]; then
193 UDEV_LOG_PRIO_ARG=--log_priority
194 UDEV_QUEUE_EMPTY="udevadm settle --timeout=1"
197 getargbool 0 rd.udev.info -y rdudevinfo && udevadm control "$UDEV_LOG_PRIO_ARG=info"
198 getargbool 0 rd.udev.debug -y rdudevdebug && udevadm control "$UDEV_LOG_PRIO_ARG=debug"
199 udevproperty "hookdir=$hookdir"
201 getarg 'rd.break=pre-trigger' 'rdbreak=pre-trigger' && emergency_shell -n pre-trigger "Break before pre-trigger"
202 source_hook pre-trigger
204 udevadm control --reload >/dev/null 2>&1 || :
206 udevadm trigger --type=subsystems --action=add >/dev/null 2>&1
207 udevadm trigger --type=devices --action=add >/dev/null 2>&1
209 getarg 'rd.break=initqueue' 'rdbreak=initqueue' && emergency_shell -n initqueue "Break before initqueue"
211 RDRETRY=$(getarg rd.retry 'rd_retry=')
212 RDRETRY=${RDRETRY:-20}
213 RDRETRY=$(($RDRETRY*2))
219 check_finished && break
223 check_finished && break
225 if [ -f $hookdir/initqueue/work ]; then
226 rm $hookdir/initqueue/work
229 for job in $hookdir/initqueue/*.sh; do
230 [ -e "$job" ] || break
232 check_finished && break 2
235 $UDEV_QUEUE_EMPTY >/dev/null 2>&1 || continue
237 for job in $hookdir/initqueue/settled/*.sh; do
238 [ -e "$job" ] || break
240 check_finished && break 2
243 $UDEV_QUEUE_EMPTY >/dev/null 2>&1 || continue
245 # no more udev jobs and queues empty.
248 if [ ! -e /sys/module/block/parameters/events_dfl_poll_msecs ]; then
249 # if the kernel does not support autopolling
250 # then we have to do a
251 # dirty hack for some cdrom drives,
252 # which report no medium for quiet
254 for cdrom in /sys/block/sr*; do
255 [ -e "$cdrom" ] || continue
256 # skip, if cdrom medium was already found
257 strstr "$(udevadm info --query=env --path=${cdrom##/sys})" \
258 ID_CDROM_MEDIA && continue
259 echo change > "$cdrom/uevent"
263 if [ $main_loop -gt $(($RDRETRY/2)) ]; then
264 for job in $hookdir/initqueue/timeout/*.sh; do
265 [ -e "$job" ] || break
271 main_loop=$(($main_loop+1))
272 [ $main_loop -gt $RDRETRY ] \
273 && { flock -s 9 ; emergency_shell "Unable to process initqueue"; } 9>/.console_lock
280 # pre-mount happens before we try to mount the root filesystem,
282 getarg 'rd.break=pre-mount' 'rdbreak=pre-mount' && emergency_shell -n pre-mount "Break pre-mount"
283 source_hook pre-mount
286 getarg 'rd.break=mount' 'rdbreak=mount' && emergency_shell -n mount "Break mount"
287 # mount scripts actually try to mount the root filesystem, and may
288 # be sourced any number of times. As soon as one suceeds, no more are sourced.
291 if ismounted "$NEWROOT"; then
292 usable_root "$NEWROOT" && break;
295 for f in $hookdir/mount/*.sh; do
296 [ -f "$f" ] && . "$f"
297 if ismounted "$NEWROOT"; then
298 usable_root "$NEWROOT" && break;
299 warn "$NEWROOT has no proper rootfs layout, ignoring and removing offending mount hook"
307 && { flock -s 9 ; emergency_shell "Can't mount root filesystem"; } 9>/.console_lock
311 echo -n "Mounted root filesystem "
312 while read dev mp rest; do [ "$mp" = "$NEWROOT" ] && echo $dev; done < /proc/mounts
315 # pre pivot scripts are sourced just before we switch over to the new root.
316 getarg 'rd.break=pre-pivot' 'rdbreak=pre-pivot' && emergency_shell -n pre-pivot "Break pre-pivot"
317 source_hook pre-pivot
319 # By the time we get here, the root filesystem should be mounted.
321 for i in "$(getarg real_init=)" "$(getarg init=)" $(getargs rd.distroinit=) /sbin/init; do
322 [ -n "$i" ] || continue
324 __p=$(readlink -f "${NEWROOT}/${i}")
325 if [ -x "$__p" ]; then
332 echo "Cannot find init!"
333 echo "Please check to make sure you passed a valid root filesystem!"
338 if [ $UDEVVERSION -lt 168 ]; then
339 # stop udev queue before killing it
340 udevadm control --stop-exec-queue
343 while pidof udevd >/dev/null 2>&1; do
344 for pid in $(pidof udevd); do
345 kill $HARD $pid >/dev/null 2>&1
350 udevadm control --exit
351 udevadm info --cleanup-db
355 set +x # Turn off debugging for this section
356 # Clean up the environment
357 for i in $(export -p); do
360 strstr "$i" "=" || continue
362 [ -z "$i" ] && continue
364 root|PATH|HOME|TERM|PS4|RD_*)
370 . /tmp/export.orig 2>/dev/null || :
371 rm -f /tmp/export.orig
374 read CLINE </proc/cmdline
375 if getarg init= >/dev/null ; then
376 set +x # Turn off debugging for this section
377 ignoreargs="console BOOT_IMAGE"
378 # only pass arguments after init= to the init
379 CLINE=${CLINE#*init=}
381 shift # clear out the rest of the "init=" arg
383 for s in $ignoreargs; do
384 [ "${x%%=*}" = $s ] && continue 2
386 initargs="$initargs $x"
390 set +x # Turn off debugging for this section
394 [0-9]|s|S|single|emergency|auto ) \
395 initargs="$initargs $x"
400 [ "$RD_DEBUG" = "yes" ] && set -x
402 if [ -d "$NEWROOT"/run ]; then
403 NEWRUN="${NEWROOT}/run"
404 mount --bind /run "$NEWRUN"
405 NEWINITRAMFSROOT="$NEWRUN/initramfs"
407 if [ "$NEWINITRAMFSROOT/lib" -ef "/lib" ]; then
408 for d in bin etc lib lib64 sbin tmp usr var; do
409 [ -h /$d ] && ln -fsn $NEWINITRAMFSROOT/$d /$d
413 NEWRUN=/dev/.initramfs
414 mkdir -m 0755 "$NEWRUN"
415 mount --bind /run/initramfs "$NEWRUN"
420 # remove helper symlink
421 [ -h /dev/root ] && rm -f /dev/root
423 getarg rd.break rdbreak && emergency_shell -n switch_root "Break before switch_root"
424 info "Switching root"
430 CAPSH=$(command -v capsh)
431 SWITCH_ROOT=$(command -v switch_root)
435 if [ -f /etc/capsdrop ]; then
437 info "Calling $INIT with capabilities $CAPS_INIT_DROP dropped."
439 exec $CAPSH --drop="$CAPS_INIT_DROP" -- \
440 -c "exec switch_root \"$NEWROOT\" \"$INIT\" $initargs" || \
443 warn capsh --drop=$CAPS_INIT_DROP -- -c exec switch_root "$NEWROOT" "$INIT" $initargs
449 exec $SWITCH_ROOT "$NEWROOT" "$INIT" $initargs || {
450 warn "Something went very badly wrong in the initramfs. Please "
451 warn "file a bug against dracut."