Releasing debian version 4.0~alpha21-1.
[live-boot.git] / scripts / live
1 #!/bin/sh
2
3 # set -e
4
5 export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
6
7 echo "/root/lib" >> /etc/ld.so.conf
8 echo "/root/usr/lib" >> /etc/ld.so.conf
9
10 mountpoint="/live/image"
11 alt_mountpoint="/media"
12 LIVE_MEDIA_PATH="live"
13
14 root_persistence="live-rw"
15 home_persistence="home-rw"
16 root_snapshot_label="live-sn"
17 home_snapshot_label="home-sn"
18
19 USERNAME="user"
20 USERFULLNAME="Live user"
21 HOSTNAME="host"
22
23 mkdir -p "${mountpoint}"
24 tried="/tmp/tried"
25
26 # Create /etc/mtab for debug purpose and future syncs
27 if [ ! -d /etc ]
28 then
29         mkdir /etc/
30 fi
31
32 if [ ! -f /etc/mtab ]
33 then
34         touch /etc/mtab
35 fi
36
37 . /scripts/live-helpers
38
39 if [ ! -f /live.vars ]
40 then
41         touch /live.vars
42 fi
43
44 Arguments ()
45 {
46         PRESEEDS=""
47         LOCATIONS=""
48
49         for ARGUMENT in $(cat /proc/cmdline)
50         do
51                 case "${ARGUMENT}" in
52                         skipconfig)
53                                 NOACCESSIBILITY="Yes"
54                                 NOFASTBOOT="Yes"
55                                 NOFSTAB="Yes"
56                                 NONETWORKING="Yes"
57
58                                 export NOACCESSIBILITY NOFASTBOOT NOFSTAB NONETWORKING
59                                 ;;
60
61                         access=*)
62                                 ACCESS="${ARGUMENT#access=}"
63                                 export ACCESS
64                                 ;;
65
66                         console=*)
67                                 DEFCONSOLE="${ARGUMENT#*=}"
68                                 export DEFCONSOLE
69                                 ;;
70
71                         debug)
72                                 DEBUG="Yes"
73                                 export DEBUG
74
75                                 set -x
76                                 ;;
77
78                         dhcp)
79                                 # Force dhcp even while netbooting
80                                 # Use for debugging in case somebody works on fixing dhclient
81                                 DHCP="Force";
82                                 export DHCP
83                                 ;;
84
85                         nodhcp)
86                                 unset DHCP
87                                 ;;
88
89                         ethdevice=*)
90                                 DEVICE="${ARGUMENT#ethdevice=}"
91                                 ETHDEVICE="${DEVICE}"
92                                 export DEVICE ETHDEVICE
93                                 ;;
94
95                         ethdevice-timeout=*)
96                                 ETHDEV_TIMEOUT="${ARGUMENT#ethdevice-timeout=}"
97                                 export ETHDEV_TIMEOUT
98                                 ;;
99
100                         fetch=*)
101                                 FETCH="${ARGUMENT#fetch=}"
102                                 export FETCH
103                                 ;;
104
105                         forcepersistentfsck)
106                                 FORCEPERSISTENTFSCK="Yes"
107                                 export FORCEPERSISTENTFSCK
108                                 ;;
109
110                         ftpfs=*)
111                                 FTPFS="${ARGUMENT#ftpfs=}"
112                                 export FTPFS
113                                 ;;
114
115                         httpfs=*)
116                                 HTTPFS="${ARGUMENT#httpfs=}"
117                                 export HTTPFS
118                                 ;;
119
120                         iscsi=*)
121                                 ISCSI="${ARGUMENT#iscsi=}"
122                                 #ip:port - separated by ;
123                                 ISCSI_PORTAL="${ISCSI%;*}"
124                                 if echo "${ISCSI_PORTAL}" | grep -q , ; then
125                                         ISCSI_SERVER="${ISCSI_PORTAL%,*}"
126                                         ISCSI_PORT="${ISCSI_PORTAL#*,}"
127                                 fi
128                                 #target name
129                                 ISCSI_TARGET="${ISCSI#*;}"
130                                 export ISCSI ISCSI_PORTAL ISCSI_TARGET ISCSI_SERVER ISCSI_PORT
131                                 ;;
132
133                         isofrom=*|fromiso=*)
134                                 FROMISO="${ARGUMENT#*=}"
135                                 export FROMISO
136                                 ;;
137
138                         ignore_uuid)
139                                 IGNORE_UUID="Yes"
140                                 export IGNORE_UUID
141                                 ;;
142
143                         integrity-check)
144                                 INTEGRITY_CHECK="Yes"
145                                 export INTEGRITY_CHECK
146                                 ;;
147
148                         ip=*)
149                                 STATICIP="${ARGUMENT#ip=}"
150
151                                 if [ -z "${STATICIP}" ]
152                                 then
153                                         STATICIP="frommedia"
154                                 fi
155
156                                 export STATICIP
157                                 ;;
158
159                         live-getty)
160                                 LIVE_GETTY="1"
161                                 export LIVE_GETTY
162                                 ;;
163
164                         live-media=*|bootfrom=*)
165                                 LIVE_MEDIA="${ARGUMENT#*=}"
166                                 export LIVE_MEDIA
167                                 ;;
168
169                         live-media-encryption=*|encryption=*)
170                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
171                                 export LIVE_MEDIA_ENCRYPTION
172                                 ;;
173
174                         live-media-offset=*)
175                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
176                                 export LIVE_MEDIA_OFFSET
177                                 ;;
178
179                         live-media-path=*)
180                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
181                                 export LIVE_MEDIA_PATH
182                                 ;;
183
184                         live-media-timeout=*)
185                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
186                                 export LIVE_MEDIA_TIMEOUT
187                                 ;;
188
189                         module=*)
190                                 MODULE="${ARGUMENT#module=}"
191                                 export MODULE
192                                 ;;
193
194                         netboot=*)
195                                 NETBOOT="${ARGUMENT#netboot=}"
196                                 export NETBOOT
197                                 ;;
198
199                         nfsopts=*)
200                                 NFSOPTS="${ARGUMENT#nfsopts=}"
201                                 export NFSOPTS
202                                 ;;
203
204                         nfscow=*)
205                                 NFS_COW="${ARGUMENT#nfscow=}"
206                                 export NFS_COW
207                                 ;;
208
209                         noaccessibility)
210                                 NOACCESSIBILITY="Yes"
211                                 export NOACCESSIBILITY
212                                 ;;
213
214                         nofastboot)
215                                 NOFASTBOOT="Yes"
216                                 export NOFASTBOOT
217                                 ;;
218
219                         nofstab)
220                                 NOFSTAB="Yes"
221                                 export NOFSTAB
222                                 ;;
223
224                         nonetworking)
225                                 NONETWORKING="Yes"
226                                 export NONETWORKING
227                                 ;;
228
229                         swapon)
230                                 SWAPON="Yes"
231                                 export SWAPON
232                                 ;;
233
234                         persistent)
235                                 PERSISTENT="Yes"
236                                 export PERSISTENT
237                                 ;;
238
239                         persistent=*)
240                                 PERSISTENT="${ARGUMENT#persistent=}"
241                                 if [ -z "${PERSISTENT}" ]
242                                 then
243                                         PERSISTENT="Yes"
244                                 fi
245                                 export PERSISTENT
246                                 ;;
247
248                         persistent-path=*)
249                                 PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
250                                 export PERSISTENT_PATH
251                                 ;;
252
253                         persistent-subtext=*)
254                                 root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
255                                 home_persistence="${home_persistence}-${ARGUMENT#persistent-subtext=}"
256                                 root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
257                                 home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
258                                 ;;
259
260                         nopersistent)
261                                 NOPERSISTENT="Yes"
262                                 export NOPERSISTENT
263                                 ;;
264
265                         quickusbmodules)
266                                 QUICKUSBMODULES="Yes"
267                                 export QUICKUSBMODULES
268                                 ;;
269
270                         preseed/file=*|file=*)
271                                 LOCATIONS="${ARGUMENT#*=} ${LOCATIONS}"
272                                 export LOCATIONS
273                                 ;;
274
275                         nopreseed)
276                                 NOPRESEED="Yes"
277                                 export NOPRESEED
278                                 ;;
279
280                         */*=*)
281                                 question="${ARGUMENT%%=*}"
282                                 value="${ARGUMENT#*=}"
283                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
284                                 export PRESEEDS
285                                 ;;
286
287                         showmounts)
288                                 SHOWMOUNTS="Yes"
289                                 export SHOWMOUNTS
290                                 ;;
291
292                         silent)
293                                 SILENT="Yes"
294                                 export SILENT
295                                 ;;
296
297                         todisk=*)
298                                 TODISK="${ARGUMENT#todisk=}"
299                                 export TODISK
300                                 ;;
301
302                         toram)
303                                 TORAM="Yes"
304                                 export TORAM
305                                 ;;
306
307                         toram=*)
308                                 TORAM="Yes"
309                                 MODULETORAM="${ARGUMENT#toram=}"
310                                 export TORAM MODULETORAM
311                                 ;;
312
313                         exposedroot)
314                                 EXPOSED_ROOT="Yes"
315                                 export EXPOSED_ROOT
316                                 ;;
317
318                         plainroot)
319                                 PLAIN_ROOT="Yes"
320                                 export PLAIN_ROOT
321                                 ;;
322
323                         skipunion)
324                                 SKIP_UNION_MOUNTS="Yes"
325                                 export SKIP_UNION_MOUNTS
326                                 ;;
327
328                         root=*)
329                                 ROOT="${ARGUMENT#root=}"
330                                 export ROOT
331                                 ;;
332
333                         union=*)
334                                 UNIONTYPE="${ARGUMENT#union=}"
335                                 export UNIONTYPE
336                                 ;;
337                 esac
338         done
339
340         # sort of compatibility with netboot.h from linux docs
341         if [ -z "${NETBOOT}" ]
342         then
343                 if [ "${ROOT}" = "/dev/nfs" ]
344                 then
345                         NETBOOT="nfs"
346                         export NETBOOT
347                 elif [ "${ROOT}" = "/dev/cifs" ]
348                 then
349                         NETBOOT="cifs"
350                         export NETBOOT
351                 fi
352         fi
353
354         if [ -z "${MODULE}" ]
355         then
356                 MODULE="filesystem"
357                 export MODULE
358         fi
359
360         if [ -z "${UNIONTYPE}" ]
361         then
362                 UNIONTYPE="aufs"
363                 export UNIONTYPE
364         fi
365 }
366
367 is_live_path ()
368 {
369         DIRECTORY="${1}"
370
371         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
372         then
373                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
374                 do
375                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
376                         then
377                                 return 0
378                         fi
379                 done
380         fi
381
382         return 1
383 }
384
385 matches_uuid ()
386 {
387         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
388         then
389                 return 0
390         fi
391
392         path="${1}"
393         uuid="$(cat /conf/uuid.conf)"
394
395         for try_uuid_file in "${path}/.disk/live-uuid"*
396         do
397                 [ -e "${try_uuid_file}" ] || continue
398
399                 try_uuid="$(cat "${try_uuid_file}")"
400
401                 if [ "${uuid}" = "${try_uuid}" ]
402                 then
403                         return 0
404                 fi
405         done
406
407         return 1
408 }
409
410 get_backing_device ()
411 {
412         case "${1}" in
413                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
414                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
415                         ;;
416
417                 *.dir)
418                         echo "directory"
419                         ;;
420
421                 *)
422                         panic "Unrecognized live filesystem: ${1}"
423                         ;;
424         esac
425 }
426
427 match_files_in_dir ()
428 {
429         # Does any files match pattern ${1} ?
430         local pattern="${1}"
431
432         if [ "$(echo ${pattern})" != "${pattern}" ]
433         then
434                 return 0
435         fi
436
437         return 1
438 }
439
440 mount_images_in_directory ()
441 {
442         directory="${1}"
443         rootmnt="${2}"
444         mac="${3}"
445
446
447         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
448                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
449                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
450                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
451                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
452                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
453         then
454                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
455                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
456         else
457                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
458         fi
459 }
460
461 is_nice_device ()
462 {
463         sysfs_path="${1#/sys}"
464
465         if /lib/udev/path_id "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-|platform-orion-ehci|platform-mmc|platform-mxsdhci|)"
466         then
467                 return 0
468         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
469         then
470                 return 0
471         elif echo ${sysfs_path} | grep -q "^/block/dm-"
472         then
473                 return 0
474         fi
475
476         return 1
477 }
478
479 copy_live_to ()
480 {
481         copyfrom="${1}"
482         copytodev="${2}"
483         copyto="${copyfrom}_swap"
484
485         if [ -z "${MODULETORAM}" ]
486         then
487                 size=$(fs_size "" ${copyfrom}/${LIVE_MEDIA_PATH} "used")
488         else
489                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
490
491                 if [ -f "${MODULETORAMFILE}" ]
492                 then
493                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
494                 else
495                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
496                         return 1
497                 fi
498         fi
499
500         if [ "${copytodev}" = "ram" ]
501         then
502                 # copying to ram:
503                 freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
504                 mount_options="-o size=${size}k"
505                 free_string="memory"
506                 fstype="tmpfs"
507                 dev="/dev/shm"
508         else
509                 # it should be a writable block device
510                 if [ -b "${copytodev}" ]
511                 then
512                         dev="${copytodev}"
513                         free_string="space"
514                         fstype=$(get_fstype "${dev}")
515                         freespace=$(fs_size "${dev}")
516                 else
517                         log_warning_msg "${copytodev} is not a block device."
518                         return 1
519                 fi
520         fi
521
522         if [ "${freespace}" -lt "${size}" ]
523         then
524                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
525                 return 1
526         fi
527
528         # begin copying (or uncompressing)
529         mkdir "${copyto}"
530         log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
531         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
532
533         if [ "${extension}" = "tgz" ]
534         then
535                 cd "${copyto}"
536                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
537                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
538                 mount -r -o move "${copyto}" "${rootmnt}"
539                 cd "${OLDPWD}"
540         else
541                 if [ -n "${MODULETORAMFILE}" ]
542                 then
543                         if [ -x /bin/rsync ]
544                         then
545                                 echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
546                                 rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
547                         else
548                                 cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
549                         fi
550                 else
551                         if [ -x /bin/rsync ]
552                         then
553                                 echo " * Copying whole medium to RAM" 1>/dev/console
554                                 rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
555                         else
556                                 mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
557                                 cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}
558                                 if [ -e ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ]
559                                 then
560                                         cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ${copyto}
561                                 fi
562                         fi
563                 fi
564
565                 umount ${copyfrom}
566                 mount -r -o move ${copyto} ${copyfrom}
567         fi
568
569         rmdir ${copyto}
570         return 0
571 }
572
573 do_netsetup ()
574 {
575         modprobe -q af_packet # For DHCP
576
577         udevadm trigger
578         udevadm settle
579
580         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && \
581            [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
582         then
583
584         # if ethdevice was not specified on the kernel command line
585         # make sure we try to get a working network configuration
586         # for *every* present network device (except for loopback of course)
587         if [ -z "$ETHDEVICE" ] ; then
588                 echo "If you want to boot from a specific device use bootoption ethdevice=..."
589                 for device in /sys/class/net/*; do
590                         dev=${device##*/} ;
591                         if [ "$dev" != "lo" ] ; then
592                                 ETHDEVICE="$ETHDEVICE $dev"
593                         fi
594                 done
595         fi
596
597         # split args of ethdevice=eth0,eth1 into "eth0 eth1"
598         for device in $(echo $ETHDEVICE | sed 's/,/ /g') ; do
599                 devlist="$devlist $device"
600         done
601
602         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
603         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
604
605         # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
606         # an endless loop; iff execution fails give it two further tries, that's
607         # why we use '$devlist $devlist $devlist' for the other for loop
608         for dev in $devlist $devlist $devlist ; do
609                 echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
610                 ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
611                 jobid=$!
612                 sleep "$ETHDEV_TIMEOUT" ; sleep 1
613                 if [ -r /proc/"$jobid"/status ] ; then
614                         echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
615                         kill -9 $jobid
616                 fi
617
618                 # if configuration of device worked we should have an assigned
619                 # IP address, iff so let's use the according as $DEVICE for later usage
620                 # simple and primitive approach which seems to work fine
621                 if ifconfig $dev | grep -q 'inet.*addr:' ; then
622                         export DEVICE="$dev"
623                         break
624                 fi
625         done
626
627         else
628         ipconfig ${DEVICE} | tee /netboot.config
629         fi
630
631         # source relevant ipconfig output
632         OLDHOSTNAME=${HOSTNAME}
633         . /tmp/net-${DEVICE}.conf
634         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
635         export HOSTNAME
636
637         if [ -n "${DEVICE}" ]
638         then
639                 HWADDR="$(cat /sys/class/net/${DEVICE}/address)"
640         fi
641
642         if [ ! -e "/etc/resolv.conf" ]
643         then
644                 echo "Creating /etc/resolv.conf"
645
646                 if [ -n "${DNSDOMAIN}" ]
647                 then
648                         echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
649                         echo "search ${DNSDOMAIN}" > /etc/resolv.conf
650                 fi
651
652                 for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
653                 do
654                         echo "nameserver $i" >> /etc/resolv.conf
655                 done
656         fi
657
658         # Check if we have a network device at all
659         if ! ls /sys/class/net/"$DEVICE" > /dev/null 2>&1 && \
660            ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
661            ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
662            ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
663            ! ls /sys/class/net/ra0 > /dev/null 2>&1
664         then
665                 panic "No supported network device found, maybe a non-mainline driver is required."
666         fi
667 }
668
669 do_netmount()
670 {
671         do_netsetup
672
673         if [ "${NFSROOT}" = "auto" ]
674         then
675                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
676         fi
677
678         rc=1
679
680         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] )
681         then
682                 do_httpmount
683                 return $?
684         fi
685
686         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
687         then
688                 NFSROOT=${ROOTSERVER}:${NFSROOT}
689         fi
690
691         log_begin_msg "Trying netboot from ${NFSROOT}"
692
693         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
694         then
695                 rc=0
696         elif do_nfsmount
697         then
698                 NETBOOT="nfs"
699                 export NETBOOT
700                 rc=0
701         fi
702
703         log_end_msg
704         return ${rc}
705 }
706
707 do_iscsi()
708 {
709         do_netsetup
710         #modprobe ib_iser
711         modprobe iscsi_tcp
712         local debugopt=""
713         [ "${DEBUG}" == "Yes" ] && debugopt="-d 8"
714         #FIXME this name is supposed to be unique - some date + ifconfig hash?
715         ISCSI_INITIATORNAME="iqn.1993-08.org.debian.live:01:$(echo "${HWADDR}" | sed -e s/://g)"
716         export ISCSI_INITIATORNAME
717         if [ -n "${ISCSI_SERVER}" ] ; then
718                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_SERVER}" -p "${ISCSI_PORT}"
719         else
720                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_PORTAL}" -p 3260
721         fi
722         if [ $? != 0 ]
723         then
724                 panic "Failed to log into iscsi target"
725         fi
726         local host="$(ls -d /sys/class/scsi_host/host*/device/iscsi_host:host* \
727                             /sys/class/scsi_host/host*/device/iscsi_host/host* | sed -e 's:/device.*::' -e 's:.*host::')"
728         if [ -n "${host}" ]
729         then
730                 local devices=""
731                 local i=0
732                 while [ -z "${devices}" -a $i -lt 60 ]
733                 do
734                         sleep 1
735                         devices="$(ls -d /sys/class/scsi_device/${host}*/device/block:* \
736                                          /sys/class/scsi_device/${host}*/device/block/* | sed -e 's!.*[:/]!!')"
737                         i=$(expr $i + 1)
738                         echo -ne $i\\r
739                 done
740                 for dev in $devices
741                 do
742                         if check_dev "null" "/dev/$dev"
743                         then
744                                 NETBOOT="iscsi"
745                                 export NETBOOT
746                                 return 0;
747                         fi
748                 done
749                 panic "Failed to locate a live device on iSCSI devices (tried: $devices)."
750         else
751                 panic "Failed to locate iSCSI host in /sys"
752         fi
753 }
754
755 do_httpmount ()
756 {
757         rc=1
758
759         for webfile in HTTPFS FTPFS FETCH
760         do
761                 local url="$(eval echo \"\$\{${webfile}\}\")"
762                 local extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
763
764                 if [ -n "$url" ]
765                 then
766                         case "${extension}" in
767                                 iso|squashfs|tgz|tar)
768                                         if [ "${extension}" = "iso" ]
769                                         then
770                                                 mkdir -p "${alt_mountpoint}"
771                                                 dest="${alt_mountpoint}"
772                                         else
773                                                 local dest="${mountpoint}/${LIVE_MEDIA_PATH}"
774                                                 mount -t ramfs ram "${mountpoint}"
775                                                 mkdir -p "${dest}"
776                                         fi
777                                         if [ "${webfile}" = "FETCH" ]
778                                         then
779                                                 case "$url" in
780                                                         tftp*)
781                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
782                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
783                                                                 lfile="$(basename $url)"
784                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
785                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
786                                                         ;;
787
788                                                         *)
789                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
790                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
791                                                                 ;;
792                                                 esac
793                                         else
794                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
795                                                 if [ "${webfile}" = "FTPFS" ]
796                                                 then
797                                                         FUSE_MOUNT="curlftpfs"
798                                                         url="$(dirname ${url})"
799                                                 else
800                                                         FUSE_MOUNT="httpfs"
801                                                 fi
802                                                 modprobe fuse
803                                                 $FUSE_MOUNT "${url}" "${dest}"
804                                                 ROOT_PID="$(minips h -C "$FUSE_MOUNT" | { read x y ; echo "$x" ; } )"
805                                         fi
806                                         [ ${?} -eq 0 ] && rc=0
807                                         [ "${extension}" = "tgz" ] && live_dest="ram"
808                                         if [ "${extension}" = "iso" ]
809                                         then
810                                                 isoloop=$(setup_loop "${dest}/$(basename "${url}")" "loop" "/sys/block/loop*" "" '')
811                                                 mount -t iso9660 "${isoloop}" "${mountpoint}"
812                                                 rc=${?}
813                                         fi
814                                         break
815                                         ;;
816
817                                 *)
818                                         log_begin_msg "Unrecognized archive extension for ${url}"
819                                         ;;
820                         esac
821                 fi
822         done
823
824         if [ ${rc} != 0 ]
825         then
826                 if [ -d "${alt_mountpoint}" ]
827                 then
828                         umount "${alt_mountpoint}"
829                         rmdir "${alt_mountpoint}"
830                 fi
831                 umount "${mountpoint}"
832         elif [ "${webfile}"  != "FETCH" ] ; then
833                 NETBOOT="${webfile}"
834                 export NETBOOT
835         fi
836
837         return ${rc}
838 }
839
840 do_nfsmount ()
841 {
842         rc=1
843
844         modprobe -q nfs
845
846         if [ -z "${NFSOPTS}" ]
847         then
848                 NFSOPTS=""
849         fi
850
851         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
852
853         # FIXME: This while loop is an ugly HACK round an nfs bug
854         i=0
855         while [ "$i" -lt 60 ]
856         do
857                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
858                 sleep 1
859                 i="$(($i + 1))"
860         done
861
862         return ${rc}
863 }
864
865 do_cifsmount ()
866 {
867         rc=1
868
869         if [ -x "/sbin/mount.cifs" ]
870         then
871                 if [ -z "${NFSOPTS}" ]
872                 then
873                         CIFSOPTS="-ouser=root,password="
874                 else
875                         CIFSOPTS="${NFSOPTS}"
876                 fi
877
878                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
879                 modprobe -q cifs
880
881                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
882                 then
883                         rc=0
884                 fi
885         fi
886
887         return ${rc}
888 }
889
890 do_snap_copy ()
891 {
892         fromdev="${1}"
893         todir="${2}"
894         snap_type="${3}"
895         size=$(fs_size "${fromdev}" "" "used")
896
897         if [ -b "${fromdev}" ]
898         then
899                 # look for free mem
900                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
901                 then
902                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
903                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
904                 else
905                         freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
906                 fi
907
908                 tomount="/mnt/tmpsnap"
909
910                 if [ ! -d "${tomount}" ]
911                 then
912                         mkdir -p "${tomount}"
913                 fi
914
915                 fstype=$(get_fstype "${fromdev}")
916
917                 if [ -n "${fstype}" ]
918                 then
919                         # Copying stuff...
920                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
921                         cp -a "${tomount}"/* ${todir}
922                         umount "${tomount}"
923                 else
924                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
925                 fi
926
927                 rmdir "${tomount}"
928
929                 if echo ${fromdev} | grep -qs loop
930                 then
931                         losetup -d "${fromdev}"
932                 fi
933
934                 return 0
935         else
936                 return 1
937
938                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
939         fi
940 }
941
942 find_snap ()
943 {
944         # Look for ${snap_label}.* in block devices
945         snap_label="${1}"
946
947         if [ "${PERSISTENT}" != "nofiles" ]
948         then
949                 # search for image files
950                 snapdata=$(find_files "${PERSISTENT_PATH}${snap_label}.squashfs ${PERSISTENT_PATH}${snap_label}.cpio.gz ${PERSISTENT_PATH}${snap_label}.ext2 ${PERSISTENT_PATH}${snap_label}.ext3 ${PERSISTENT_PATH}${snap_label}.ext4 ${PERSISTENT_PATH}${snap_label}.jffs2")
951         fi
952
953         if [ -z "${snapdata}" ]
954         then
955                 snapdata=$(find_cow_device "${snap_label}")
956         fi
957         echo "${snapdata}"
958 }
959
960 try_snap ()
961 {
962         # copy the contents of previously found snapshot to ${snap_mount}
963         # and remember the device and filename for resync on exit in live-boot.init
964
965         snapdata="${1}"
966         snap_mount="${2}"
967         snap_type="${3}"
968
969         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
970         then
971                 log_success_msg "found snapshot: ${snapdata}"
972                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
973                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
974                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
975
976                 if ! try_mount "${snapdev}" "${snapback}" "ro"
977                 then
978                         break
979                 fi
980
981                 RES="0"
982
983                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
984                 then
985                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
986                         dev=$(get_backing_device "${snapback}/${snapfile}")
987
988                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
989                         RES="$?"
990                 else
991                         # cpio.gz snapshot
992
993                         # Unfortunately klibc's cpio is incompatible with the
994                         # rest of the world; everything else requires -u -d,
995                         # while klibc doesn't implement them. Try to detect
996                         # whether it's in use.
997                         cpiopath="$(which cpio)" || true
998                         if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"
999                         then
1000                                 cpioargs=
1001                         else
1002                                 cpioargs='--unconditional --make-directories'
1003                         fi
1004
1005                         cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse 2>/dev/null
1006                         RES="$?"
1007
1008                         if [ "${RES}" != "0" ]
1009                         then
1010                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse\""
1011                         fi
1012                 fi
1013
1014                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
1015
1016                 if [ "${RES}" != "0" ]
1017                 then
1018                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
1019                 fi
1020
1021         elif [ -b "${snapdata}" ]
1022         then
1023                 # Try to find if it could be a snapshot partition
1024                 dev="${snapdata}"
1025                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1026                 if echo "${dev}" | grep -qs loop
1027                 then
1028                         # strange things happens, user confused?
1029                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1030                         snapfile=$(basename ${snaploop})
1031                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1032                 else
1033                         snapdev="${dev}"
1034                 fi
1035
1036                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1037                 then
1038                         log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1039                         return 1
1040                 else
1041                         if [ -n "${snapfile}" ]
1042                         then
1043                                 # it was a loop device, user confused
1044                                 umount ${snapdev}
1045                         fi
1046                 fi
1047         else
1048                 log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1049                 return 1
1050         fi
1051
1052         echo "export ${snap_type}SNAP="/cow${snap_mount#$rootmnt}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
1053         return 0
1054 }
1055
1056 setup_unionfs ()
1057 {
1058         image_directory="${1}"
1059         rootmnt="${2}"
1060         addimage_directory="${3}"
1061
1062         case ${UNIONTYPE} in
1063                 aufs|unionfs)
1064                         modprobe -q -b ${UNIONTYPE}
1065
1066                         if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
1067                         then
1068                                 echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
1069                                 echo "This might be really slow."
1070
1071                                 UNIONTYPE="unionfs-fuse"
1072                         fi
1073                         ;;
1074         esac
1075
1076         if [ "${UNIONTYPE}" = unionfs-fuse ]
1077         then
1078                 modprobe fuse
1079         fi
1080
1081         # run-init can't deal with images in a subdir, but we're going to
1082         # move all of these away before it runs anyway.  No, we're not,
1083         # put them in / since move-mounting them into / breaks mono and
1084         # some other apps.
1085
1086         croot="/"
1087
1088         # Let's just mount the read-only file systems first
1089         rofsstring=""
1090         rofslist=""
1091
1092         if [ "${UNIONTYPE}" = "aufs" ]
1093         then
1094                 roopt="rr"
1095                 noxino_opt="noxino,"
1096         elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
1097         then
1098                 roopt="RO"
1099         else
1100                 roopt="ro"
1101         fi
1102
1103         if [ -z "${PLAIN_ROOT}" ]
1104         then
1105                 # Read image names from ${MODULE}.module if it exists
1106                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1107                 then
1108                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1109                         do
1110                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1111                         done
1112                 elif [ -e "${image_directory}/${MODULE}.module" ]
1113                 then
1114                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1115                         do
1116                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1117                         done
1118                 else
1119                         # ${MODULE}.module does not exist, create a list of images
1120                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1121                         do
1122                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1123                                 do
1124                                         if [ -e "${IMAGE}" ]
1125                                         then
1126                                                 image_string="${image_string} ${IMAGE}"
1127                                         fi
1128                                 done
1129                         done
1130
1131                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1132                         then
1133                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1134                                 do
1135                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1136                                         do
1137                                                 if [ -e "${IMAGE}" ]
1138                                                 then
1139                                                         image_string="${image_string} ${IMAGE}"
1140                                                 fi
1141                                         done
1142                                 done
1143                         fi
1144
1145                         # Now sort the list
1146                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1147                 fi
1148
1149         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1150
1151                 mkdir -p "${croot}"
1152
1153                 for image in ${image_string}
1154                 do
1155                         imagename=$(basename "${image}")
1156
1157                         export image devname
1158                         maybe_break live-realpremount
1159                         log_begin_msg "Running /scripts/live-realpremount"
1160                         run_scripts /scripts/live-realpremount
1161                         log_end_msg
1162
1163                         if [ -d "${image}" ]
1164                         then
1165                                 # it is a plain directory: do nothing
1166                                 rofsstring="${image}=${roopt}:${rofsstring}"
1167                                 rofslist="${image} ${rofslist}"
1168                         elif [ -f "${image}" ]
1169                         then
1170                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1171                                 then
1172                                         backdev=$(get_backing_device "${image}" "-r")
1173                                 else
1174                                         backdev=$(get_backing_device "${image}")
1175                                 fi
1176                                 fstype=$(get_fstype "${backdev}")
1177
1178                                 if [ "${fstype}" = "unknown" ]
1179                                 then
1180                                         panic "Unknown file system type on ${backdev} (${image})"
1181                                 fi
1182
1183                                 if [ -z "${fstype}" ]
1184                                 then
1185                                         fstype="${imagename##*.}"
1186                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1187                                 fi
1188
1189                                 mkdir -p "${croot}/${imagename}"
1190                                 log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1191                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1192                                 log_end_msg
1193                         fi
1194                 done
1195         else
1196                 # we have a plain root system
1197                 mkdir -p "${croot}/filesystem"
1198                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1199                 mount -t $(get_fstype "${image_directory}") -o ro,noatime "${image_directory}" "${croot}/filesystem" || panic "Can not mount ${image_directory} on ${croot}/filesystem" && rofsstring="${croot}/filesystem=${roopt}:${rofsstring}" && rofslist="${croot}/filesystem ${rofslist}"
1200                 # probably broken:
1201                 mount -o bind ${croot}/filesystem $mountpoint
1202                 log_end_msg
1203         fi
1204
1205         rofsstring=${rofsstring%:}
1206
1207         mkdir -p /cow
1208
1209         # Looking for "${root_persistence}" device or file
1210         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1211         then
1212                 if [ -z "${QUICKUSBMODULES}" ]
1213                 then
1214                         # Load USB modules
1215                         num_block=$(ls -l /sys/block | wc -l)
1216                         for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1217                         do
1218                                 modprobe -q -b ${module}
1219                         done
1220
1221                         udevadm trigger
1222                         udevadm settle
1223
1224                         # For some reason, udevsettle does not block in this scenario,
1225                         # so we sleep for a little while.
1226                         #
1227                         # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1228                         for timeout in 5 4 3 2 1
1229                         do
1230                                 sleep 1
1231
1232                                 if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1233                                 then
1234                                         break
1235                                 fi
1236                         done
1237                 fi
1238
1239                 # search for label and files (this could be hugely optimized)
1240                 cowprobe=$(find_cow_device "${root_persistence}")
1241                 if [ -b "${cowprobe}" ]
1242                 then
1243                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1244                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1245                         # snapshots to be sure to really store some e.g key config files,
1246                         # but not on the same media
1247                         blacklistdev="${cowprobe}"
1248                         PERSISTENCE_IS_ON="1"
1249                         export PERSISTENCE_IS_ON
1250                 fi
1251                 # homecow just mount something on /home, this should be generalized some way
1252                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1253                 if [ -b "${homecow}" ]
1254                 then
1255                         PERSISTENCE_IS_ON="1"
1256                         export PERSISTENCE_IS_ON
1257                 fi
1258                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1259                 # This second type should be removed when snapshot will get smarter,
1260                 # hence when "/etc/live-snapshot*list" will be supported also by
1261                 # ext2|ext3|ext4|jffs2 snapshot types.
1262                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1263
1264                 if [ -b "${cowprobe}" ]
1265                 then
1266                         cowdevice=${cowprobe}
1267                         cow_fstype=$(get_fstype "${cowprobe}")
1268                         cow_mountopt="rw,noatime"
1269
1270                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1271                         then
1272                                 fsck -y ${cowdevice}
1273                         fi
1274                 else
1275                         log_warning_msg "Unable to find the persistent medium"
1276                         cowdevice="tmpfs"
1277                         cow_fstype="tmpfs"
1278                         cow_mountopt="rw,noatime,mode=755"
1279                 fi
1280         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1281         then
1282                 # check if there are any nfs options
1283                 if echo ${NFS_COW}|grep -q ','
1284                 then
1285                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1286                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1287                 else
1288                         nfs_cow_opts="-o nolock"
1289                         nfs_cow=${NFS_COW}
1290                 fi
1291                 mac="$(get_mac)"
1292                 if [ -n "${mac}" ]
1293                 then
1294                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1295                         cow_fstype="nfs"
1296                 else
1297                         panic "unable to determine mac address"
1298                 fi
1299         else
1300                 cowdevice="tmpfs"
1301                 cow_fstype="tmpfs"
1302                 cow_mountopt="rw,noatime,mode=755"
1303         fi
1304
1305         if [ "${cow_fstype}" = "nfs" ]
1306         then
1307                 log_begin_msg \
1308                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1309                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1310                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1311         else
1312                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1313                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1314         fi
1315
1316         rofscount=$(echo ${rofslist} |wc -w)
1317
1318         if [ -n "${EXPOSED_ROOT}" ]
1319         then
1320                 if [ ${rofscount} -ne 1 ]
1321                 then
1322                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1323                 fi
1324                 exposedrootfs=${rofslist%% }
1325
1326                 mount --bind ${exposedrootfs} ${rootmnt} || \
1327                         panic "bind mount of ${exposedrootfs} failed"
1328
1329                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1330                 then
1331                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1332                 else
1333                         cow_dirs=''
1334                 fi
1335
1336                 for dir in ${cow_dirs}; do
1337                         mkdir -p /cow${dir}
1338
1339                         case "${UNIONTYPE}" in
1340                                 unionfs-fuse)
1341                                         (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:${exposedrootfs}${dir} "${rootmnt}${dir}" || panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option cow,noinitgroups,default_permissions,allow_other,use_ino,suid=/cow=RW:${exposedrootfs}${dir}")
1342                                         mkdir -p /dev/.initramfs/varrun
1343                                         pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1344                                         ;;
1345
1346                                 *)
1347                                         mount -t ${UNIONTYPE} -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro ${UNIONTYPE} "${rootmnt}${dir}" || panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1348                                         ;;
1349                         esac
1350                 done
1351         else
1352                 case "${UNIONTYPE}" in
1353                         unionfs-fuse)
1354                                 (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:${rofsstring} "${rootmnt}" || panic "mount ${UNIONTYPE} on ${rootmnt} failed with option cow,noinitgroups,default_permissions,allow_other,use_ino,suid=/cow:RW:${rofsstring}")
1355                                 mkdir -p /dev/.initramfs/varrun
1356                                 pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1357                                 ;;
1358
1359                         *)
1360                                 mount -t ${UNIONTYPE} -o noatime,${noxino_opt}dirs=/cow=rw:${rofsstring} ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on ${rootmnt} failed with option noatime,${noxino_opt}dirs=/cow=rw:${rofsstring}"
1361                                 ;;
1362                 esac
1363         fi
1364
1365         # Correct the permissions of /:
1366         chmod 0755 "${rootmnt}"
1367
1368         # tmpfs file systems
1369         touch /etc/fstab
1370         mkdir -p "${rootmnt}/live"
1371         mount -t tmpfs tmpfs ${rootmnt}/live
1372
1373         # Adding other custom mounts
1374         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1375         then
1376                 # directly mount /home
1377                 # FIXME: add a custom mounts configurable system
1378
1379                 if [ -b "${homecow}" ]
1380                 then
1381                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1382                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1383                 else
1384                         log_warning_msg "Unable to find the persistent home medium"
1385                 fi
1386
1387                 # Look for other snapshots to copy in
1388                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1389                 # This second type should be removed when snapshot grow smarter
1390                 try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
1391         fi
1392
1393         if [ -n "${SHOWMOUNTS}" ]
1394         then
1395                 for d in ${rofslist}
1396                 do
1397                         mkdir -p "${rootmnt}/live/${d##*/}"
1398
1399                         case d in
1400                                 *.dir)
1401                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1402                                         ;;
1403
1404                                 *)
1405                                         case "${UNIONTYPE}" in
1406                                                 unionfs-fuse)
1407                                                         mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1408                                                         ;;
1409
1410                                                 *)
1411                                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1412                                                         ;;
1413                                         esac
1414                                         ;;
1415                         esac
1416                 done
1417         fi
1418
1419         # shows cow fs on /cow for use by live-snapshot
1420         mkdir -p "${rootmnt}/live/cow"
1421         mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
1422 }
1423
1424 check_dev ()
1425 {
1426         sysdev="${1}"
1427         devname="${2}"
1428         skip_uuid_check="${3}"
1429
1430         # support for fromiso=.../isofrom=....
1431         if [ -n "$FROMISO" ]
1432         then
1433                 ISO_DEVICE=$(dirname $FROMISO)
1434                 if ! [ -b $ISO_DEVICE ]
1435                 then
1436                         # to support unusual device names like /dev/cciss/c0d0p1
1437                         # as well we have to identify the block device name, let's
1438                         # do that for up to 15 levels
1439                         i=15
1440                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
1441                         do
1442                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
1443                                 [ -b "$ISO_DEVICE" ] && break
1444                                 i=$(($i -1))
1445                         done
1446                 fi
1447
1448                 if [ "$ISO_DEVICE" = "/" ]
1449                 then
1450                         echo "Warning: device for bootoption isofrom= ($FROMISO) not found.">>/live.log
1451                 else
1452                         mkdir /isofrom
1453                         mount "$ISO_DEVICE" /isofrom
1454                         ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
1455                         loopdevname=$(setup_loop "/isofrom/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
1456                         devname="${loopdevname}"
1457                 fi
1458         fi
1459
1460         if [ -z "${devname}" ]
1461         then
1462                 devname=$(sys2dev "${sysdev}")
1463         fi
1464
1465         if [ -d "${devname}" ]
1466         then
1467                 mount -o bind "${devname}" $mountpoint || continue
1468
1469                 if is_live_path $mountpoint
1470                 then
1471                         echo $mountpoint
1472                         return 0
1473                 else
1474                         umount $mountpoint
1475                 fi
1476         fi
1477         [ -e "$devname" ] || continue
1478
1479         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1480         then
1481                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1482                 devname="${loopdevname}"
1483         fi
1484
1485         fstype=$(get_fstype "${devname}")
1486
1487         if is_supported_fs ${fstype}
1488         then
1489                 devuid=$(blkid -o value -s UUID "$devname")
1490                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
1491                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1492                 [ -n "$devuid" ] && echo "$devuid" >> $tried
1493
1494                 if is_live_path ${mountpoint} && \
1495                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1496                 then
1497                         echo ${mountpoint}
1498                         return 0
1499                 else
1500                         umount ${mountpoint}
1501                 fi
1502         fi
1503
1504         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1505         then
1506                 losetup -d "${loopdevname}"
1507         fi
1508
1509         return 1
1510 }
1511
1512 find_livefs ()
1513 {
1514         timeout="${1}"
1515
1516         # don't start autodetection before timeout has expired
1517         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1518         then
1519                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1520                 then
1521                         return 1
1522                 fi
1523         fi
1524
1525         # first look at the one specified in the command line
1526         case "${LIVE_MEDIA}" in
1527                 removable-usb)
1528                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1529                         do
1530                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1531                                 then
1532                                         if readlink ${sysblock} | grep -q usb ||
1533                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1534                                         then
1535                                                 for dev in $(subdevices "${sysblock}")
1536                                                 do
1537                                                         if check_dev "${dev}"
1538                                                         then
1539                                                                 return 0
1540                                                         fi
1541                                                 done
1542                                         fi
1543                                 fi
1544                         done
1545                         return 1
1546                         ;;
1547
1548                 removable)
1549                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1550                         do
1551                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1552                                 then
1553                                         for dev in $(subdevices "${sysblock}")
1554                                         do
1555                                                 if check_dev "${dev}"
1556                                                 then
1557                                                         return 0
1558                                                 fi
1559                                         done
1560                                 fi
1561                         done
1562                         return 1
1563                         ;;
1564
1565                 *)
1566                         if [ ! -z "${LIVE_MEDIA}" ]
1567                         then
1568                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1569                                 then
1570                                         return 0
1571                                 fi
1572                         fi
1573                         ;;
1574         esac
1575
1576         # or do the scan of block devices
1577         # prefer removable devices over non-removable devices, so scan them first
1578         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | egrep -v "/(loop|ram|dm-|fd)")
1579         do
1580                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1581                 then
1582                         removable_devices_to_scan="$removable_devices_to_scan $sysblock"
1583                 else
1584                         nonremovable_devices_to_scan="$nonremovable_devices_to_scan $sysblock"
1585                 fi
1586         done
1587         devices_to_scan="$removable_devices_to_scan $nonremovable_devices_to_scan"
1588
1589         for sysblock in $devices_to_scan
1590         do
1591                 devname=$(sys2dev "${sysblock}")
1592                 [ -e "$devname" ] || continue
1593                 fstype=$(get_fstype "${devname}")
1594
1595                 if /lib/udev/cdrom_id ${devname} > /dev/null
1596                 then
1597                         if check_dev "null" "${devname}"
1598                         then
1599                                 return 0
1600                         fi
1601                 elif is_nice_device "${sysblock}"
1602                 then
1603                         for dev in $(subdevices "${sysblock}")
1604                         do
1605                                 if check_dev "${dev}"
1606                                 then
1607                                         return 0
1608                                 fi
1609                         done
1610                 elif [ "${fstype}" = "squashfs" -o \
1611                         "${fstype}" = "btrfs" -o \
1612                         "${fstype}" = "ext2" -o \
1613                         "${fstype}" = "ext3" -o \
1614                         "${fstype}" = "ext4" -o \
1615                         "${fstype}" = "jffs2" ]
1616                 then
1617                         # This is an ugly hack situation, the block device has
1618                         # an image directly on it.  It's hopefully
1619                         # live-boot, so take it and run with it.
1620                         ln -s "${devname}" "${devname}.${fstype}"
1621                         echo "${devname}.${fstype}"
1622                         return 0
1623                 fi
1624         done
1625
1626         return 1
1627 }
1628
1629 set_usplash_timeout ()
1630 {
1631         if [ -x /sbin/usplash_write ]
1632         then
1633                 /sbin/usplash_write "TIMEOUT 120"
1634         else if [ -x /sbin/splashy_update ] ; then
1635                 /sbin/splashy_update "TIMEOUT 120"
1636         fi ; fi
1637 }
1638
1639 integrity_check ()
1640 {
1641         media_mountpoint="${1}"
1642
1643         log_begin_msg "Checking media integrity"
1644
1645         cd ${media_mountpoint}
1646         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1647         RC="${?}"
1648
1649         log_end_msg
1650
1651         if [ "${RC}" -eq 0 ]
1652         then
1653                 log_success_msg "Everything ok, will reboot in 10 seconds."
1654                 sleep 10
1655                 cd /
1656                 umount ${media_mountpoint}
1657                 sync
1658                 echo u > /proc/sysrq-trigger
1659                 echo b > /proc/sysrq-trigger
1660         else
1661                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1662         fi
1663 }
1664
1665 start_usplash_pulse ()
1666 {
1667         if [ -x /sbin/usplash_write ]
1668         then
1669                 /sbin/usplash_write "PULSELOGO"
1670         fi
1671 }
1672
1673 mountroot ()
1674 {
1675         if [ -x /scripts/local-top/cryptroot ]; then
1676             /scripts/local-top/cryptroot
1677         fi
1678
1679         exec 6>&1
1680         exec 7>&2
1681         exec > live.log
1682         exec 2>&1
1683         tail -f live.log >&7 &
1684         tailpid="${!}"
1685
1686         # Ensure 'panic' function is overridden
1687         . /scripts/live-functions
1688
1689         Arguments
1690
1691         set_usplash_timeout
1692         start_usplash_pulse
1693
1694         maybe_break live-premount
1695         log_begin_msg "Running /scripts/live-premount"
1696         run_scripts /scripts/live-premount
1697         log_end_msg
1698
1699         # Needed here too because some things (*cough* udev *cough*)
1700         # changes the timeout
1701
1702         set_usplash_timeout
1703
1704         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1705         then
1706                 if do_netmount
1707                 then
1708                         livefs_root="${mountpoint}"
1709                 else
1710                         panic "Unable to find a live file system on the network"
1711                 fi
1712         else
1713                 if [ -n "${ISCSI_PORTAL}" ]
1714                 then
1715                         do_iscsi && livefs_root="${mountpoint}"
1716                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1717                 then
1718                         # Do a local boot from hd
1719                         livefs_root=${ROOT}
1720                 else
1721                         if [ -x /usr/bin/memdiskfind ]
1722                         then
1723                                 MEMDISK=$(/usr/bin/memdiskfind)
1724
1725                                 if [ $? -eq 0 ]
1726                                 then
1727                                         # We found a memdisk, set up phram
1728                                         modprobe phram phram=memdisk,${MEMDISK}
1729
1730                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
1731                                         modprobe mtdblock
1732                                 fi
1733                         fi
1734
1735                         # Scan local devices for the image
1736                         i=0
1737                         while [ "$i" -lt 60 ]
1738                         do
1739                                 livefs_root=$(find_livefs ${i})
1740
1741                                 if [ -n "${livefs_root}" ]
1742                                 then
1743                                         break
1744                                 fi
1745
1746                                 sleep 1
1747                                 i="$(($i + 1))"
1748                         done
1749                 fi
1750         fi
1751
1752         if [ -z "${livefs_root}" ]
1753         then
1754                 panic "Unable to find a medium containing a live file system"
1755         fi
1756
1757         if [ "${INTEGRITY_CHECK}" ]
1758         then
1759                 integrity_check "${livefs_root}"
1760         fi
1761
1762         if [ "${TORAM}" ]
1763         then
1764                 live_dest="ram"
1765         elif [ "${TODISK}" ]
1766         then
1767                 live_dest="${TODISK}"
1768         fi
1769
1770         if [ "${live_dest}" ]
1771         then
1772                 log_begin_msg "Copying live media to ${live_dest}"
1773                 copy_live_to "${livefs_root}" "${live_dest}"
1774                 log_end_msg
1775         fi
1776
1777         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
1778         # because the mountpoint is left behind in /proc/mounts, so let's get
1779         # rid of it when running from RAM
1780         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
1781         then
1782           losetup -d /dev/loop0
1783           grep -q /isofrom /proc/mounts && umount /isofrom
1784         fi
1785
1786         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1787         then
1788                 setup_unionfs "${livefs_root}" "${rootmnt}"
1789         else
1790                 mac="$(get_mac)"
1791                 mac="$(echo ${mac} | sed 's/-//g')"
1792                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1793         fi
1794
1795
1796         if [ -n "${ROOT_PID}" ] ; then
1797                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
1798         fi
1799
1800         log_end_msg
1801
1802         # unionfs-fuse needs /dev to be bind-mounted for the duration of
1803         # live-bottom; udev's init script will take care of things after that
1804         if [ "${UNIONTYPE}" = unionfs-fuse ]
1805         then
1806                 mount -n -o bind /dev "${rootmnt}/dev"
1807         fi
1808
1809         # Move to the new root filesystem so that programs there can get at it.
1810         if [ ! -d /root/live/image ]
1811         then
1812                 mkdir -p /root/live/image
1813                 mount --move /live/image /root/live/image
1814         fi
1815
1816         maybe_break live-bottom
1817         log_begin_msg "Running /scripts/live-bottom\n"
1818
1819         run_scripts /scripts/live-bottom
1820         log_end_msg
1821
1822         if [ "${UNIONFS}" = unionfs-fuse ]
1823         then
1824                 umount "${rootmnt}/dev"
1825         fi
1826
1827         exec 1>&6 6>&-
1828         exec 2>&7 7>&-
1829         kill ${tailpid}
1830         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1831 }