Annotation of /trunk/mkinitrd-magellan/livecd/linuxrc.sh
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Wed Aug 7 10:17:30 2013 UTC (10 years, 9 months ago) by niro
File MIME type: application/x-sh
File size: 7003 byte(s)
Wed Aug 7 10:17:30 2013 UTC (10 years, 9 months ago) by niro
File MIME type: application/x-sh
File size: 7003 byte(s)
-respect cpufreq.governor 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="${fs}" |
49 | niro | 532 | break |
50 | fi | ||
51 | fi | ||
52 | done | ||
53 | } | ||
54 | |||
55 | ## some defaults ## | ||
56 | DOSCSI=no | ||
57 | DOUSB=no | ||
58 | niro | 894 | DOSATA=yes |
59 | niro | 663 | DOFB=no |
60 | niro | 894 | DOPATA=yes |
61 | niro | 663 | FORCED_ROOTFS="" |
62 | niro | 1180 | INITEXEC="/sbin/init" |
63 | niro | 1188 | BREAK_ENABLED=no |
64 | niro | 1296 | UNIONFS=no |
65 | UNIONFS_FILE="" | ||
66 | niro | 1809 | SYSROOT="/sysroot" |
67 | CLOOPMOUNTDIR="${SYSROOT}/mnt/cloop" | ||
68 | niro | 532 | |
69 | ## starts here ## | ||
70 | |||
71 | # mount essential filesystems | ||
72 | mount -t proc proc /proc | ||
73 | mount -t sysfs sysfs /sys | ||
74 | niro | 1792 | if [[ -z $(grep '[[:space:]]/dev[[:space:]]' /proc/mounts | cut -d ' ' -f2) ]] |
75 | then | ||
76 | # many video drivers needed exec access | ||
77 | fstype=ramfs | ||
78 | # tmpfs was suggested by Greg Kroah-Hartman | ||
79 | [[ $(grep '[[:space:]]tmpfs' /proc/filesystems | cut -d $'\t' -f2) = tmpfs ]] && fstype=tmpfs | ||
80 | # mount devtmpfs if supported | ||
81 | [[ $(grep '[[:space:]]devtmpfs' /proc/filesystems | cut -d $'\t' -f2) = devtmpfs ]] && fstype=devtmpfs | ||
82 | mount -t ${fstype} dev /dev -o exec,nosuid,mode=0755,size=10M | ||
83 | fi | ||
84 | niro | 532 | |
85 | niro | 894 | # install all busybox applets |
86 | busybox --install -s | ||
87 | |||
88 | niro | 532 | # silencio |
89 | echo 0 > /proc/sys/kernel/printk | ||
90 | |||
91 | # check command line for params | ||
92 | for i in $(cat /proc/cmdline) | ||
93 | do | ||
94 | case "${i}" in | ||
95 | niro | 894 | doscsi) DOSCSI=yes;; |
96 | noscsi) DOSCSI=no;; | ||
97 | dousb) DOUSB=yes;; | ||
98 | nousb) DOUSB=no;; | ||
99 | dosata) DOSATA=yes ;; | ||
100 | nosata) DOSATA=no ;; | ||
101 | dofb) DOFB=yes;; | ||
102 | nofb) DOFB=no;; | ||
103 | dopata) DOPATA=yes;; | ||
104 | nopata) DOPATA=no;; | ||
105 | rootfs=*) FORCED_ROOTFS="${i#*=}";; | ||
106 | niro | 1180 | init=*) INITEXEC="${i#*=}";; |
107 | niro | 1188 | break) BREAK_ENABLED=yes ;; |
108 | niro | 1296 | unionfs) UNIONFS=yes;; |
109 | unionfs_file=*) UNIONFS_FILE="${i#*=}";; | ||
110 | niro | 1513 | rootdelay=*) ROOTDELAY="${i#*=}";; |
111 | niro | 2154 | cpufreq.governor=*) CPUFREQ_GOVERNOR="${i#*=}";; |
112 | niro | 532 | esac |
113 | done | ||
114 | |||
115 | # now load all needed modules | ||
116 | niro | 671 | [ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer" |
117 | niro | 532 | load_kernel_modules "generic" |
118 | niro | 673 | [ "${DOPATA}" = "yes" ] && load_kernel_modules "pata" |
119 | niro | 532 | [ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi" |
120 | [ "${DOUSB}" = "yes" ] && load_kernel_modules "usb" | ||
121 | [ "${DOSATA}" = "yes" ] && load_kernel_modules "sata" | ||
122 | |||
123 | niro | 894 | # populate dev |
124 | mdev -s | ||
125 | # handle hotplug events properly | ||
126 | echo /sbin/mdev > /proc/sys/kernel/hotplug | ||
127 | |||
128 | niro | 532 | # create newroot mount point |
129 | niro | 1809 | mkdir -p ${SYSROOT} |
130 | niro | 532 | # fake a new filesystem (also needed with an initramfs!!) |
131 | niro | 1809 | mount -t tmpfs tmpfs ${SYSROOT} |
132 | niro | 532 | |
133 | niro | 1809 | mkdir -p ${SYSROOT}/mnt/cdrom |
134 | mkdir -p ${SYSROOT}/mnt/cloop | ||
135 | mkdir -p ${SYSROOT}/mnt/magellan | ||
136 | niro | 532 | |
137 | |||
138 | # needed for the usbstick, the timeout maybe to short | ||
139 | if [ "${DOUSB}" = "yes" ]; then | ||
140 | echo "-- Waiting 8 seconds for possible usb mount ..." | ||
141 | sleep 8 | ||
142 | fi | ||
143 | |||
144 | niro | 1513 | # respect rootdelay kernel param |
145 | if [ ! -z "${ROOTDELAY}" ]; then | ||
146 | echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..." | ||
147 | sleep ${ROOTDELAY} | ||
148 | fi | ||
149 | |||
150 | niro | 2154 | # respect cpufreq.governor kernel param |
151 | if [ ! -z "${CPUFREQ_GOVERNOR}" ]; | ||
152 | then | ||
153 | case "${CPUFREQ_GOVERNOR}" in | ||
154 | performance|conservative|powersave|ondemand|userspace) | ||
155 | echo "-- Set ${CPUFREQ_GOVERNOR} as default cpufreq.governor" | ||
156 | for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor | ||
157 | do | ||
158 | echo "${CPUFREQ_GOVERNOR}" > "${cpu}" | ||
159 | done | ||
160 | ;; | ||
161 | *) | ||
162 | echo "-- Unknown cpufreq.governor ${CPUFREQ_GOVERNOR} selected, doing nothing" | ||
163 | ;; | ||
164 | esac | ||
165 | fi | ||
166 | |||
167 | niro | 532 | # searching cdrom with cdid |
168 | BOOT_DEVICE="" | ||
169 | FSTYPE="" | ||
170 | |||
171 | echo "Searching for a boot device ..." | ||
172 | |||
173 | # searching usbstick | ||
174 | if [ "${DOUSB}" = "yes" ]; then | ||
175 | niro | 663 | ROOTFS="vfat" |
176 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
177 | niro | 663 | check_drives "/dev/sd*" "${ROOTFS}" |
178 | check_drives "/dev/sg*" "${ROOTFS}" | ||
179 | niro | 532 | fi |
180 | |||
181 | # for cdrom_device in $CDROM_LIST (ide) | ||
182 | niro | 663 | ROOTFS="iso9660" |
183 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
184 | niro | 663 | check_drives "/dev/cdroms/*" "${ROOTFS}" |
185 | check_drives "/dev/hd*" "${ROOTFS}" | ||
186 | niro | 532 | |
187 | # scsi cdroms | ||
188 | if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then | ||
189 | niro | 663 | ROOTFS="iso9660" |
190 | niro | 706 | [[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}" |
191 | niro | 663 | check_drives "/dev/sr*" "${ROOTFS}" |
192 | check_drives "/dev/sg*" "${ROOTFS}" | ||
193 | check_drives "/dev/scd*" "${ROOTFS}" | ||
194 | niro | 532 | fi |
195 | |||
196 | # mount our rootfs from cdrom | ||
197 | if [ "${BOOT_DEVICE}" = "" ] | ||
198 | then | ||
199 | echo "No Magellan boot CD/USBStick found!!!" | ||
200 | ash | ||
201 | exit 1 | ||
202 | else | ||
203 | echo -e "Booting from: $BOOT_DEVICE ..." | ||
204 | niro | 1809 | mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" ${SYSROOT}/mnt/cdrom >/dev/null 2>&1 |
205 | niro | 532 | |
206 | # write our boot_device to /mnt/.bootdev for later use (mtab) | ||
207 | niro | 1809 | echo "BOOTDEV=${BOOT_DEVICE}" > ${SYSROOT}/.bootdev |
208 | echo "FSTYPE=${FSTYPE}" >> ${SYSROOT}/.bootdev | ||
209 | niro | 532 | |
210 | # mount squashfs | ||
211 | echo -e "Mounting squashfs system image ..." | ||
212 | echo | ||
213 | [ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0 | ||
214 | niro | 1809 | mount -o loop,ro -t squashfs ${SYSROOT}/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}" |
215 | niro | 532 | |
216 | niro | 1296 | # mount unionfs if enabled |
217 | if [[ ${UNIONFS} = yes ]] | ||
218 | then | ||
219 | echo -e "Mounting writeable cdbuffer (unionfs) ..." | ||
220 | |||
221 | # default setting | ||
222 | niro | 1809 | CLOOPMOUNTDIR="${SYSROOT}/mnt/unionfs" |
223 | [[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="${SYSROOT}/mnt/cdrom/unionfs" | ||
224 | niro | 1296 | |
225 | niro | 1809 | [[ ! -d ${SYSROOT}/mnt/unionfs ]] && install -d ${SYSROOT}/mnt/unionfs |
226 | mount -t unionfs dirs=${UNIONFS_FILE}=rw:${SYSROOT}/mnt/cloop=ro ${CLOOPMOUNTDIR} | ||
227 | niro | 1296 | fi |
228 | |||
229 | niro | 532 | # symlinking cloop rootfs to /mnt as newroot |
230 | niro | 1809 | cd ${SYSROOT} |
231 | niro | 532 | |
232 | niro | 605 | for x in bin sbin lib lib64 boot usr opt |
233 | niro | 532 | do |
234 | niro | 1809 | [ -d ${CLOOPMOUNTDIR}/${x} ] && ln -s ${CLOOPMOUNTDIR#${SYSROOT}}/${x} ${x} |
235 | niro | 532 | done |
236 | mkdir -p initrd proc tmp sys var/tmp dev media | ||
237 | |||
238 | niro | 1809 | # make ${SYSROOT}/dev/console & /mnt/dev/null |
239 | [ ! -e ${SYSROOT}/dev/console ] && mknod -m 600 ${SYSROOT}/dev/console c 5 1 | ||
240 | [ ! -e ${SYSROOT}/dev/null ] && mknod -m 666 ${SYSROOT}/dev/null c 1 3 | ||
241 | niro | 1794 | # only to be safe and to have a log channel |
242 | niro | 1809 | [ ! -e ${SYSROOT}/dev/tty ] && mknod ${SYSROOT}/dev/tty c 5 0 |
243 | niro | 1794 | # busybox needs this one |
244 | niro | 1809 | [ ! -e ${SYSROOT}/dev/tty5 ] && mknod ${SYSROOT}/dev/tty5 c 4 5 |
245 | niro | 532 | |
246 | niro | 1809 | (cd ${CLOOPMOUNTDIR}; cp -a etc root home var ${SYSROOT}) |
247 | niro | 532 | |
248 | niro | 1809 | # ensure that ${SYSROOT}/linurc exists |
249 | [ ! -e ${SYSROOT}/linuxrc ] && ln -snf ${INITEXEC} ${SYSROOT}/linuxrc | ||
250 | niro | 1512 | |
251 | niro | 532 | # ensure the right permissions |
252 | niro | 1809 | chmod 1777 ${SYSROOT}/tmp |
253 | chmod 1777 ${SYSROOT}/var/tmp | ||
254 | niro | 532 | fi |
255 | |||
256 | cd / | ||
257 | |||
258 | niro | 894 | # unset hotplug event-manager |
259 | echo > /proc/sys/kernel/hotplug | ||
260 | |||
261 | niro | 532 | # de-silencio |
262 | echo 3 > /proc/sys/kernel/printk | ||
263 | |||
264 | niro | 1188 | if [[ ${BREAK_ENABLED} = yes ]] |
265 | then | ||
266 | echo "-- Break requested, type 'exit' to resume operation ..." | ||
267 | ash | ||
268 | fi | ||
269 | |||
270 | niro | 532 | echo "-- Switching to real sysroot ..." |
271 | niro | 1809 | mount --move /dev ${SYSROOT}/dev |
272 | mount --move /sys ${SYSROOT}/sys | ||
273 | mount --move /proc ${SYSROOT}/proc | ||
274 | niro | 532 | |
275 | niro | 1809 | exec run-init ${SYSROOT} ${INITEXEC} $@ < ${SYSROOT}/dev/console > ${SYSROOT}/dev/console |