Annotation of /trunk/mkinitrd-magellan/livecd/linuxrc.sh
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Wed Sep 7 17:42:43 2011 UTC (13 years ago) by niro
File MIME type: application/x-sh
File size: 5920 byte(s)
Wed Sep 7 17:42:43 2011 UTC (13 years ago) by niro
File MIME type: application/x-sh
File size: 5920 byte(s)
-respect rootdelay kernel param
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 | 894 | mount -t tmpfs tmpfs /dev -o rw,mode=0644,size=1024 |
74 | niro | 532 | |
75 | niro | 894 | # install all busybox applets |
76 | busybox --install -s | ||
77 | |||
78 | niro | 532 | # silencio |
79 | echo 0 > /proc/sys/kernel/printk | ||
80 | |||
81 | # check command line for params | ||
82 | for i in $(cat /proc/cmdline) | ||
83 | do | ||
84 | case "${i}" in | ||
85 | niro | 894 | doscsi) DOSCSI=yes;; |
86 | noscsi) DOSCSI=no;; | ||
87 | dousb) DOUSB=yes;; | ||
88 | nousb) DOUSB=no;; | ||
89 | dosata) DOSATA=yes ;; | ||
90 | nosata) DOSATA=no ;; | ||
91 | dofb) DOFB=yes;; | ||
92 | nofb) DOFB=no;; | ||
93 | dopata) DOPATA=yes;; | ||
94 | nopata) DOPATA=no;; | ||
95 | rootfs=*) FORCED_ROOTFS="${i#*=}";; | ||
96 | niro | 1180 | init=*) INITEXEC="${i#*=}";; |
97 | niro | 1188 | break) BREAK_ENABLED=yes ;; |
98 | niro | 1296 | unionfs) UNIONFS=yes;; |
99 | unionfs_file=*) UNIONFS_FILE="${i#*=}";; | ||
100 | niro | 1513 | rootdelay=*) ROOTDELAY="${i#*=}";; |
101 | niro | 532 | esac |
102 | done | ||
103 | |||
104 | # now load all needed modules | ||
105 | niro | 671 | [ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer" |
106 | niro | 532 | load_kernel_modules "generic" |
107 | niro | 673 | [ "${DOPATA}" = "yes" ] && load_kernel_modules "pata" |
108 | niro | 532 | [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi" |
109 | [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb" | ||
110 | [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata" | ||
111 | |||
112 | niro | 894 | # populate dev |
113 | mdev -s | ||
114 | # handle hotplug events properly | ||
115 | echo /sbin/mdev > /proc/sys/kernel/hotplug | ||
116 | |||
117 | niro | 532 | # create newroot mount point |
118 | mkdir -p /sysroot | ||
119 | # fake a new filesystem (also needed with an initramfs!!) | ||
120 | mount -t tmpfs tmpfs /sysroot | ||
121 | |||
122 | mkdir -p /sysroot/mnt/cdrom | ||
123 | mkdir -p /sysroot/mnt/cloop | ||
124 | mkdir -p /sysroot/mnt/magellan | ||
125 | |||
126 | |||
127 | # needed for the usbstick, the timeout maybe to short | ||
128 | if [ "${DOUSB}" = "yes" ]; then | ||
129 | echo "-- Waiting 8 seconds for possible usb mount ..." | ||
130 | sleep 8 | ||
131 | fi | ||
132 | |||
133 | niro | 1513 | # respect rootdelay kernel param |
134 | if [ ! -z "${ROOTDELAY}" ]; then | ||
135 | echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..." | ||
136 | sleep ${ROOTDELAY} | ||
137 | fi | ||
138 | |||
139 | niro | 532 | # searching cdrom with cdid |
140 | BOOT_DEVICE="" | ||
141 | FSTYPE="" | ||
142 | |||
143 | echo "Searching for a boot device ..." | ||
144 | |||
145 | # searching usbstick | ||
146 | if [ "${DOUSB}" = "yes" ]; then | ||
147 | niro | 663 | ROOTFS="vfat" |
148 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
149 | niro | 663 | check_drives "/dev/sd*" "${ROOTFS}" |
150 | check_drives "/dev/sg*" "${ROOTFS}" | ||
151 | niro | 532 | fi |
152 | |||
153 | # for cdrom_device in $CDROM_LIST (ide) | ||
154 | niro | 663 | ROOTFS="iso9660" |
155 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
156 | niro | 663 | check_drives "/dev/cdroms/*" "${ROOTFS}" |
157 | check_drives "/dev/hd*" "${ROOTFS}" | ||
158 | niro | 532 | |
159 | # scsi cdroms | ||
160 | if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then | ||
161 | niro | 663 | ROOTFS="iso9660" |
162 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
163 | niro | 663 | check_drives "/dev/sr*" "${ROOTFS}" |
164 | check_drives "/dev/sg*" "${ROOTFS}" | ||
165 | check_drives "/dev/scd*" "${ROOTFS}" | ||
166 | niro | 532 | fi |
167 | |||
168 | # mount our rootfs from cdrom | ||
169 | if [ "${BOOT_DEVICE}" = "" ] | ||
170 | then | ||
171 | echo "No Magellan boot CD/USBStick found!!!" | ||
172 | ash | ||
173 | exit 1 | ||
174 | else | ||
175 | echo -e "Booting from: $BOOT_DEVICE ..." | ||
176 | mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1 | ||
177 | |||
178 | # write our boot_device to /mnt/.bootdev for later use (mtab) | ||
179 | echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev | ||
180 | echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev | ||
181 | |||
182 | # mount squashfs | ||
183 | echo -e "Mounting squashfs system image ..." | ||
184 | echo | ||
185 | [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0 | ||
186 | niro | 1296 | mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}" |
187 | niro | 532 | |
188 | niro | 1296 | # mount unionfs if enabled |
189 | if [[ ${UNIONFS} = yes ]] | ||
190 | then | ||
191 | echo -e "Mounting writeable cdbuffer (unionfs) ..." | ||
192 | |||
193 | # default setting | ||
194 | CLOOPMOUNTDIR="/sysroot/mnt/unionfs" | ||
195 | [[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="/sysroot/mnt/cdrom/unionfs" | ||
196 | |||
197 | [[ ! -d /sysroot/mnt/unionfs ]] && install -d /sysroot/mnt/unionfs | ||
198 | mount -t unionfs dirs=${UNIONFS_FILE}=rw:/sysroot/mnt/cloop=ro ${CLOOPMOUNTDIR} | ||
199 | fi | ||
200 | |||
201 | niro | 532 | # symlinking cloop rootfs to /mnt as newroot |
202 | cd /sysroot | ||
203 | |||
204 | niro | 605 | for x in bin sbin lib lib64 boot usr opt |
205 | niro | 532 | do |
206 | niro | 1296 | [ -d ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x} |
207 | niro | 532 | done |
208 | mkdir -p initrd proc tmp sys var/tmp dev media | ||
209 | |||
210 | # make /sysroot/dev/console & /mnt/dev/null | ||
211 | [ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1 | ||
212 | [ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3 | ||
213 | niro | 753 | # only to be safe and to have a log channel |
214 | niro | 757 | [ ! -e /sysroot/dev/tty ] && mknod /sysroot/dev/tty c 5 0 |
215 | niro | 753 | # busybox needs this one |
216 | niro | 757 | [ ! -e /sysroot/dev/tty5 ] && mknod /sysroot/dev/tty5 c 4 5 |
217 | niro | 532 | |
218 | niro | 1296 | (cd ${CLOOPMOUNTDIR}; cp -a etc root home var /sysroot) |
219 | niro | 532 | |
220 | niro | 1512 | # ensure that /sysroot/linurc exists |
221 | [ ! -e /sysroot/linuxrc ] && ln -snf ${INITEXEC} /sysroot/linuxrc | ||
222 | |||
223 | niro | 532 | # ensure the right permissions |
224 | chmod 1777 /sysroot/tmp | ||
225 | chmod 1777 /sysroot/var/tmp | ||
226 | fi | ||
227 | |||
228 | cd / | ||
229 | |||
230 | niro | 894 | # unset hotplug event-manager |
231 | echo > /proc/sys/kernel/hotplug | ||
232 | |||
233 | niro | 532 | # de-silencio |
234 | echo 3 > /proc/sys/kernel/printk | ||
235 | |||
236 | niro | 1188 | if [[ ${BREAK_ENABLED} = yes ]] |
237 | then | ||
238 | echo "-- Break requested, type 'exit' to resume operation ..." | ||
239 | ash | ||
240 | fi | ||
241 | |||
242 | niro | 532 | echo "-- Switching to real sysroot ..." |
243 | niro | 894 | umount /dev |
244 | niro | 532 | umount /sys |
245 | umount /proc | ||
246 | |||
247 | niro | 1180 | exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console |