Contents of /trunk/mkinitrd-magellan/livecd/linuxrc.sh
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Mon Apr 2 11:40:49 2012 UTC (12 years, 5 months ago) by niro
File MIME type: application/x-sh
File size: 6571 byte(s)
Mon Apr 2 11:40:49 2012 UTC (12 years, 5 months ago) by niro
File MIME type: application/x-sh
File size: 6571 byte(s)
-mount move initrd filesystems to real sysroot
1 | #!/bin/sh |
2 | # $Id$ |
3 | |
4 | # loads given kernel modules |
5 | load_kernel_modules() |
6 | { |
7 | local type="$1" |
8 | local module |
9 | local args |
10 | |
11 | echo -e "-- Loading ${type} modules:" |
12 | ( cat /etc/modules.${type}; echo) | while read module args |
13 | do |
14 | case "${module}" in |
15 | \#*|"") continue ;; |
16 | esac |
17 | |
18 | if [ -e /lib/${module}.ko ] |
19 | then |
20 | insmod -f /lib/${module}.ko ${args} > /dev/null 2>&1 |
21 | [ $? -eq 0 ] && echo -e "-- ${module}" |
22 | fi |
23 | done |
24 | echo |
25 | } |
26 | |
27 | # check_drives $devices $fstype |
28 | check_drives() |
29 | { |
30 | local devices="$1" |
31 | local fs="$2" |
32 | |
33 | for dev in ${devices} |
34 | do |
35 | mount -t ${fs} ${dev} /sysroot/mnt/cdrom >/dev/null 2>&1 |
36 | media_found=$? |
37 | |
38 | # if mount was ok check if cdid exists |
39 | if [ "${media_found}" -eq 0 ] |
40 | then |
41 | [ -e /sysroot/mnt/cdrom/livecdrootfs.sqsh ] && media_id_ok=$? |
42 | umount /sysroot/mnt/cdrom |
43 | |
44 | if [ "${media_id_ok}" -eq 0 ] |
45 | then |
46 | echo -e "Magellan boot device found." |
47 | BOOT_DEVICE="${dev}" |
48 | FSTYPE="${fs}" |
49 | break |
50 | fi |
51 | fi |
52 | done |
53 | } |
54 | |
55 | ## some defaults ## |
56 | DOSCSI=no |
57 | DOUSB=no |
58 | DOSATA=yes |
59 | DOFB=no |
60 | DOPATA=yes |
61 | FORCED_ROOTFS="" |
62 | INITEXEC="/sbin/init" |
63 | BREAK_ENABLED=no |
64 | UNIONFS=no |
65 | UNIONFS_FILE="" |
66 | CLOOPMOUNTDIR="/sysroot/mnt/cloop" |
67 | |
68 | ## starts here ## |
69 | |
70 | # mount essential filesystems |
71 | mount -t proc proc /proc |
72 | mount -t sysfs sysfs /sys |
73 | if [[ -z $(grep '[[:space:]]/dev[[:space:]]' /proc/mounts | cut -d ' ' -f2) ]] |
74 | then |
75 | # many video drivers needed exec access |
76 | fstype=ramfs |
77 | # tmpfs was suggested by Greg Kroah-Hartman |
78 | [[ $(grep '[[:space:]]tmpfs' /proc/filesystems | cut -d $'\t' -f2) = tmpfs ]] && fstype=tmpfs |
79 | # mount devtmpfs if supported |
80 | [[ $(grep '[[:space:]]devtmpfs' /proc/filesystems | cut -d $'\t' -f2) = devtmpfs ]] && fstype=devtmpfs |
81 | mount -t ${fstype} dev /dev -o exec,nosuid,mode=0755,size=10M |
82 | fi |
83 | |
84 | # install all busybox applets |
85 | busybox --install -s |
86 | |
87 | # silencio |
88 | echo 0 > /proc/sys/kernel/printk |
89 | |
90 | # check command line for params |
91 | for i in $(cat /proc/cmdline) |
92 | do |
93 | case "${i}" in |
94 | doscsi) DOSCSI=yes;; |
95 | noscsi) DOSCSI=no;; |
96 | dousb) DOUSB=yes;; |
97 | nousb) DOUSB=no;; |
98 | dosata) DOSATA=yes ;; |
99 | nosata) DOSATA=no ;; |
100 | dofb) DOFB=yes;; |
101 | nofb) DOFB=no;; |
102 | dopata) DOPATA=yes;; |
103 | nopata) DOPATA=no;; |
104 | rootfs=*) FORCED_ROOTFS="${i#*=}";; |
105 | init=*) INITEXEC="${i#*=}";; |
106 | break) BREAK_ENABLED=yes ;; |
107 | unionfs) UNIONFS=yes;; |
108 | unionfs_file=*) UNIONFS_FILE="${i#*=}";; |
109 | rootdelay=*) ROOTDELAY="${i#*=}";; |
110 | esac |
111 | done |
112 | |
113 | # now load all needed modules |
114 | [ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer" |
115 | load_kernel_modules "generic" |
116 | [ "${DOPATA}" = "yes" ] && load_kernel_modules "pata" |
117 | [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi" |
118 | [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb" |
119 | [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata" |
120 | |
121 | # populate dev |
122 | mdev -s |
123 | # handle hotplug events properly |
124 | echo /sbin/mdev > /proc/sys/kernel/hotplug |
125 | |
126 | # create newroot mount point |
127 | mkdir -p /sysroot |
128 | # fake a new filesystem (also needed with an initramfs!!) |
129 | mount -t tmpfs tmpfs /sysroot |
130 | |
131 | mkdir -p /sysroot/mnt/cdrom |
132 | mkdir -p /sysroot/mnt/cloop |
133 | mkdir -p /sysroot/mnt/magellan |
134 | |
135 | |
136 | # needed for the usbstick, the timeout maybe to short |
137 | if [ "${DOUSB}" = "yes" ]; then |
138 | echo "-- Waiting 8 seconds for possible usb mount ..." |
139 | sleep 8 |
140 | fi |
141 | |
142 | # respect rootdelay kernel param |
143 | if [ ! -z "${ROOTDELAY}" ]; then |
144 | echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..." |
145 | sleep ${ROOTDELAY} |
146 | fi |
147 | |
148 | # searching cdrom with cdid |
149 | BOOT_DEVICE="" |
150 | FSTYPE="" |
151 | |
152 | echo "Searching for a boot device ..." |
153 | |
154 | # searching usbstick |
155 | if [ "${DOUSB}" = "yes" ]; then |
156 | ROOTFS="vfat" |
157 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
158 | check_drives "/dev/sd*" "${ROOTFS}" |
159 | check_drives "/dev/sg*" "${ROOTFS}" |
160 | fi |
161 | |
162 | # for cdrom_device in $CDROM_LIST (ide) |
163 | ROOTFS="iso9660" |
164 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
165 | check_drives "/dev/cdroms/*" "${ROOTFS}" |
166 | check_drives "/dev/hd*" "${ROOTFS}" |
167 | |
168 | # scsi cdroms |
169 | if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then |
170 | ROOTFS="iso9660" |
171 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
172 | check_drives "/dev/sr*" "${ROOTFS}" |
173 | check_drives "/dev/sg*" "${ROOTFS}" |
174 | check_drives "/dev/scd*" "${ROOTFS}" |
175 | fi |
176 | |
177 | # mount our rootfs from cdrom |
178 | if [ "${BOOT_DEVICE}" = "" ] |
179 | then |
180 | echo "No Magellan boot CD/USBStick found!!!" |
181 | ash |
182 | exit 1 |
183 | else |
184 | echo -e "Booting from: $BOOT_DEVICE ..." |
185 | mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1 |
186 | |
187 | # write our boot_device to /mnt/.bootdev for later use (mtab) |
188 | echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev |
189 | echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev |
190 | |
191 | # mount squashfs |
192 | echo -e "Mounting squashfs system image ..." |
193 | echo |
194 | [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0 |
195 | mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}" |
196 | |
197 | # mount unionfs if enabled |
198 | if [[ ${UNIONFS} = yes ]] |
199 | then |
200 | echo -e "Mounting writeable cdbuffer (unionfs) ..." |
201 | |
202 | # default setting |
203 | CLOOPMOUNTDIR="/sysroot/mnt/unionfs" |
204 | [[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="/sysroot/mnt/cdrom/unionfs" |
205 | |
206 | [[ ! -d /sysroot/mnt/unionfs ]] && install -d /sysroot/mnt/unionfs |
207 | mount -t unionfs dirs=${UNIONFS_FILE}=rw:/sysroot/mnt/cloop=ro ${CLOOPMOUNTDIR} |
208 | fi |
209 | |
210 | # symlinking cloop rootfs to /mnt as newroot |
211 | cd /sysroot |
212 | |
213 | for x in bin sbin lib lib64 boot usr opt |
214 | do |
215 | [ -d ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x} |
216 | done |
217 | mkdir -p initrd proc tmp sys var/tmp dev media |
218 | |
219 | # use devtmpfs if supported |
220 | if [ "$(grep devtmpfs /proc/filesystems | cut -d$'\t' -f2)" = "devtmpfs" ] |
221 | then |
222 | mount -t devtmpfs dev /sysroot/dev |
223 | else |
224 | # make /sysroot/dev/console & /mnt/dev/null |
225 | [ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1 |
226 | [ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3 |
227 | # only to be safe and to have a log channel |
228 | [ ! -e /sysroot/dev/tty ] && mknod /sysroot/dev/tty c 5 0 |
229 | # busybox needs this one |
230 | [ ! -e /sysroot/dev/tty5 ] && mknod /sysroot/dev/tty5 c 4 5 |
231 | fi |
232 | |
233 | (cd ${CLOOPMOUNTDIR}; cp -a etc root home var /sysroot) |
234 | |
235 | # ensure that /sysroot/linurc exists |
236 | [ ! -e /sysroot/linuxrc ] && ln -snf ${INITEXEC} /sysroot/linuxrc |
237 | |
238 | # ensure the right permissions |
239 | chmod 1777 /sysroot/tmp |
240 | chmod 1777 /sysroot/var/tmp |
241 | fi |
242 | |
243 | cd / |
244 | |
245 | # unset hotplug event-manager |
246 | echo > /proc/sys/kernel/hotplug |
247 | |
248 | # de-silencio |
249 | echo 3 > /proc/sys/kernel/printk |
250 | |
251 | if [[ ${BREAK_ENABLED} = yes ]] |
252 | then |
253 | echo "-- Break requested, type 'exit' to resume operation ..." |
254 | ash |
255 | fi |
256 | |
257 | echo "-- Switching to real sysroot ..." |
258 | mount --move /dev /sysroot/dev |
259 | mount --move /sys /sysroot/sys |
260 | mount --move /proc /sysroot/proc |
261 | |
262 | exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console |