Annotation of /trunk/mkinitrd-magellan/livecd/linuxrc.sh
Parent Directory | Revision Log
Revision 1792 -
(hide annotations)
(download)
(as text)
Mon Apr 2 11:39:05 2012 UTC (12 years, 5 months ago) by niro
File MIME type: application/x-sh
File size: 6513 byte(s)
Mon Apr 2 11:39:05 2012 UTC (12 years, 5 months ago) by niro
File MIME type: application/x-sh
File size: 6513 byte(s)
-mount the best available filesystem for /dev
1 | niro | 532 | #!/bin/sh |
2 | niro | 809 | # $Id$ |
3 | niro | 532 | |
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 | niro | 663 | FSTYPE="${fs}" |
49 | niro | 532 | break |
50 | fi | ||
51 | fi | ||
52 | done | ||
53 | } | ||
54 | |||
55 | ## some defaults ## | ||
56 | DOSCSI=no | ||
57 | DOUSB=no | ||
58 | niro | 894 | DOSATA=yes |
59 | niro | 663 | DOFB=no |
60 | niro | 894 | DOPATA=yes |
61 | niro | 663 | FORCED_ROOTFS="" |
62 | niro | 1180 | INITEXEC="/sbin/init" |
63 | niro | 1188 | BREAK_ENABLED=no |
64 | niro | 1296 | UNIONFS=no |
65 | UNIONFS_FILE="" | ||
66 | CLOOPMOUNTDIR="/sysroot/mnt/cloop" | ||
67 | niro | 532 | |
68 | ## starts here ## | ||
69 | |||
70 | # mount essential filesystems | ||
71 | mount -t proc proc /proc | ||
72 | mount -t sysfs sysfs /sys | ||
73 | niro | 1792 | 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 | niro | 532 | |
84 | niro | 894 | # install all busybox applets |
85 | busybox --install -s | ||
86 | |||
87 | niro | 532 | # 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 | niro | 894 | 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="${i#*=}";; | ||
105 | niro | 1180 | init=*) INITEXEC="${i#*=}";; |
106 | niro | 1188 | break) BREAK_ENABLED=yes ;; |
107 | niro | 1296 | unionfs) UNIONFS=yes;; |
108 | unionfs_file=*) UNIONFS_FILE="${i#*=}";; | ||
109 | niro | 1513 | rootdelay=*) ROOTDELAY="${i#*=}";; |
110 | niro | 532 | esac |
111 | done | ||
112 | |||
113 | # now load all needed modules | ||
114 | niro | 671 | [ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer" |
115 | niro | 532 | load_kernel_modules "generic" |
116 | niro | 673 | [ "${DOPATA}" = "yes" ] && load_kernel_modules "pata" |
117 | niro | 532 | [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi" |
118 | [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb" | ||
119 | [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata" | ||
120 | |||
121 | niro | 894 | # populate dev |
122 | mdev -s | ||
123 | # handle hotplug events properly | ||
124 | echo /sbin/mdev > /proc/sys/kernel/hotplug | ||
125 | |||
126 | niro | 532 | # create newroot mount point |
127 | mkdir -p /sysroot | ||
128 | # fake a new filesystem (also needed with an initramfs!!) | ||
129 | mount -t tmpfs tmpfs /sysroot | ||
130 | |||
131 | mkdir -p /sysroot/mnt/cdrom | ||
132 | mkdir -p /sysroot/mnt/cloop | ||
133 | mkdir -p /sysroot/mnt/magellan | ||
134 | |||
135 | |||
136 | # needed for the usbstick, the timeout maybe to short | ||
137 | if [ "${DOUSB}" = "yes" ]; then | ||
138 | echo "-- Waiting 8 seconds for possible usb mount ..." | ||
139 | sleep 8 | ||
140 | fi | ||
141 | |||
142 | niro | 1513 | # respect rootdelay kernel param |
143 | if [ ! -z "${ROOTDELAY}" ]; then | ||
144 | echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..." | ||
145 | sleep ${ROOTDELAY} | ||
146 | fi | ||
147 | |||
148 | niro | 532 | # searching cdrom with cdid |
149 | BOOT_DEVICE="" | ||
150 | FSTYPE="" | ||
151 | |||
152 | echo "Searching for a boot device ..." | ||
153 | |||
154 | # searching usbstick | ||
155 | if [ "${DOUSB}" = "yes" ]; then | ||
156 | niro | 663 | ROOTFS="vfat" |
157 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
158 | niro | 663 | check_drives "/dev/sd*" "${ROOTFS}" |
159 | check_drives "/dev/sg*" "${ROOTFS}" | ||
160 | niro | 532 | fi |
161 | |||
162 | # for cdrom_device in $CDROM_LIST (ide) | ||
163 | niro | 663 | ROOTFS="iso9660" |
164 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
165 | niro | 663 | check_drives "/dev/cdroms/*" "${ROOTFS}" |
166 | check_drives "/dev/hd*" "${ROOTFS}" | ||
167 | niro | 532 | |
168 | # scsi cdroms | ||
169 | if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then | ||
170 | niro | 663 | ROOTFS="iso9660" |
171 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
172 | niro | 663 | check_drives "/dev/sr*" "${ROOTFS}" |
173 | check_drives "/dev/sg*" "${ROOTFS}" | ||
174 | check_drives "/dev/scd*" "${ROOTFS}" | ||
175 | niro | 532 | fi |
176 | |||
177 | # mount our rootfs from cdrom | ||
178 | if [ "${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=${FSTYPE}" >> /sysroot/.bootdev | ||
190 | |||
191 | # mount squashfs | ||
192 | echo -e "Mounting squashfs system image ..." | ||
193 | echo | ||
194 | [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0 | ||
195 | niro | 1296 | mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}" |
196 | niro | 532 | |
197 | niro | 1296 | # 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 | niro | 532 | # symlinking cloop rootfs to /mnt as newroot |
211 | cd /sysroot | ||
212 | |||
213 | niro | 605 | for x in bin sbin lib lib64 boot usr opt |
214 | niro | 532 | do |
215 | niro | 1296 | [ -d ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x} |
216 | niro | 532 | done |
217 | mkdir -p initrd proc tmp sys var/tmp dev media | ||
218 | |||
219 | niro | 1514 | # use devtmpfs if supported |
220 | if [ "$(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 | niro | 532 | |
233 | niro | 1296 | (cd ${CLOOPMOUNTDIR}; cp -a etc root home var /sysroot) |
234 | niro | 532 | |
235 | niro | 1512 | # ensure that /sysroot/linurc exists |
236 | [ ! -e /sysroot/linuxrc ] && ln -snf ${INITEXEC} /sysroot/linuxrc | ||
237 | |||
238 | niro | 532 | # ensure the right permissions |
239 | chmod 1777 /sysroot/tmp | ||
240 | chmod 1777 /sysroot/var/tmp | ||
241 | fi | ||
242 | |||
243 | cd / | ||
244 | |||
245 | niro | 894 | # unset hotplug event-manager |
246 | echo > /proc/sys/kernel/hotplug | ||
247 | |||
248 | niro | 532 | # de-silencio |
249 | echo 3 > /proc/sys/kernel/printk | ||
250 | |||
251 | niro | 1188 | if [[ ${BREAK_ENABLED} = yes ]] |
252 | then | ||
253 | echo "-- Break requested, type 'exit' to resume operation ..." | ||
254 | ash | ||
255 | fi | ||
256 | |||
257 | niro | 532 | echo "-- Switching to real sysroot ..." |
258 | niro | 894 | umount /dev |
259 | niro | 532 | umount /sys |
260 | umount /proc | ||
261 | |||
262 | niro | 1180 | exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console |