WebSVN – livecd – Diff – /trunk/linux-live.sl/initrd/linuxrc


#!/bin/ash
#
# Original version from http://www.linux-live.org/
#
# modified by Urs Beyerle, PSI
# - to allow LiveCD mounted over NFS
# - add support for LiveCD on SATA devices
 
export PATH=.:/:/usr/sbin:/usr/bin:/sbin:/bin
. liblinuxlive
 
 
echolog "mounting /proc and /sys filesystems"
mount -t proc proc /proc
mount -t sysfs sysfs /sys
ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a
 
# setup DEBUGCMD variable. If debug boot option is present, call debug()
# function several times during script's execution
if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi
 
$DEBUGCMD
 
# amount of RAM to store changes
RAMSIZE="`cmdline_value ramsize`"
if [ "$RAMSIZE" = "" ]; then RAMSIZE="70%"; fi
 
# I have to set these variables very carefully
UNION=/union
MEMORY=/memory
MOUNTDIR=livecd
CHANGES=$MEMORY/changes
COPY2RAM=$MEMORY/copy2ram
IMAGES=$MEMORY/images
INITRAMDISK=$MOUNTDIR/live
 
# set NFSROOT if nfsroot= in boot parameter 
NFSROOT="`cmdline_value nfsroot`"
 
# we need cdrom support, isofs support, unionfs/aufs support, etc
modprobe_essential_modules
 
# disable DMA if nodma parameter is used
setup_dma
 
$DEBUGCMD
 
# if NFSROOT is set:
echolog "check for nfsroot"
if [ "$NFSROOT" != "" ]; then
 
   # load network modules, if NFSROOT is set
   echolog "nfsroot: $NFSROOT"
   load_network_modules
 
   $DEBUGCMD
 
   # get DHCP lease
 
   get_dhcp_lease
   
   $DEBUGCMD
 
    # we need nfs modules loaded, if NFSROOT is set
    modprobe_nfs_modules
 
fi
 
$DEBUGCMD
 
# $UNION will be used as a root directory, livecd modules will be added soon.
echolog "setup union on $UNION"
mkdir -p $UNION
mkdir -p $MEMORY
 
CHANGESDEV="`cmdline_value changes`"
if [ "$CHANGESDEV" != "" ]; then
   echo "mounting $CHANGESDEV to $MEMORY"
   mount_device $CHANGESDEV $MEMORY
else false; fi
 
# mount tmpfs only in the case when changes= boot parameter was empty
# or we were not able to mount the storage device
if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi
 
mkdir -p $CHANGES
mkdir -p $COPY2RAM
mkdir -p $IMAGES
 
# mount unionfs or aufs
lsmod | grep -q ^unionfs
if [ $? -eq 0 ]; then  
    mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION
    if [ $? -ne 0 ]; then fatal "can't setup union in $UNION directory"; fi
    echolog "unionfs mounted"
else
    mount -t aufs -o br:$CHANGES=rw aufs $UNION
    if [ $? -ne 0 ]; then fatal "can't setup union (aufs) in $UNION directory"; fi
    echolog "aufs mounted"
fi
 
$DEBUGCMD
 
# try to find livecd data directory. If not found, try modprobing
# USB and SATA kernel modules and repeat the find procedure again
echolog "looking for data modules"
DATA="`find_live_data_dir $MOUNTDIR`";
if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found."; fi
echolog "LiveCD found in: $DATA"
 
$DEBUGCMD
 
# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.
# (skip modules from /optional/ which are not listed in load= boot option)
# Finaly modify DATA variable so it will point to correct directory
if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then
   echolog "copying modules to RAM, this may take some time"
   copy_to_ram $DATA $COPY2RAM
   cd_autoeject 1
   umount $DATA 2>/dev/null
   if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi
   DATA=$COPY2RAM
   cd_autoeject 0
fi
 
mkdir -p $UNION/boot
mount -o bind $DATA $UNION/boot
 
$DEBUGCMD
 
# DATA contains path to the base directory of all .mo images which need
# to be mounted and inserted into live filesystem. Do it now.
echolog "inserting all modules and creating live filesystem"
union_insert_modules $UNION $DATA $IMAGES
 
$DEBUGCMD
 
echo "copying rootchanges"
copy_rootchanges $DATA $UNION
 
$DEBUGCMD
 
echo "creating /etc/fstab"
activate_fstab $UNION
 
# More likely these directories aren't there.
# Even if they are, this won't hurt.
mkdir -p $UNION/proc
mkdir -p $UNION/sys
mkdir -p $UNION/tmp
chmod 1777 $UNION/tmp
mkdir -p $UNION/dev
mkdir -p $UNION/initrd
 
$DEBUGCMD
 
# no X? (set runlevel to 3)
if [ "`cmdline_parameter nox`" ]; then
  echo "set runlevel to 3"
  sed -i "s/id:.:initdefault:/id:3:initdefault:/" $UNION/etc/inittab
fi
 
$DEBUGCMD
 
# Union contains all the files and directories unioned from all modules.
# Change root directory to it, and move initrd's root to /livecd/live/initramdisk
# Finaly execute /sbin/init to start the distribution.
echolog "changing root directory..."
cd $UNION
mkdir -p $INITRAMDISK
 
umount /sys # we won't need it anymore
if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi
 
if [ -x $UNION/usr/sbin/chroot ];
  then CHROOT=/usr/sbin/chroot
  else CHROOT=/usr/bin/chroot
fi
 
echolog "End of linux live scripts"
 
# pure magic ;-)
cat $UNION/bin/true >/dev/null
 
$DEBUGCMD
 
pivot_root . $INITRAMDISK
exec $CHROOT . sbin/init <dev/console >dev/console 2>&1
 
header "ERROR!"
echolog "You are not supposed to be here, something went wrong!"
echolog "Even Ctrl+Alt+Del won't help you in kernel panic."
 

Rev 149	Rev 150
1	`#!/bin/ash`	1	`#!/bin/ash`
2	`#`	2	`#`
3	`# Original version from http://www.linux-live.org/`	3	`# Original version from http://www.linux-live.org/`
4	`#`	4	`#`
5	`# modified by Urs Beyerle, PSI`	5	`# modified by Urs Beyerle, PSI`
6	`# - to allow LiveCD mounted over NFS`	6	`# - to allow LiveCD mounted over NFS`
7	`# - add support for LiveCD on SATA devices`	7	`# - add support for LiveCD on SATA devices`
8		8
9	`export PATH=.:/:/usr/sbin:/usr/bin:/sbin:/bin`	9	`export PATH=.:/:/usr/sbin:/usr/bin:/sbin:/bin`
10	`. liblinuxlive`	10	`. liblinuxlive`
11		11
12		12
13	`echolog "mounting /proc and /sys filesystems"`	13	`echolog "mounting /proc and /sys filesystems"`
14	`mount -t proc proc /proc`	14	`mount -t proc proc /proc`
15	`mount -t sysfs sysfs /sys`	15	`mount -t sysfs sysfs /sys`
16	`ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a`	16	`ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a`
17		17
18	`# setup DEBUGCMD variable. If debug boot option is present, call debug()`	18	`# setup DEBUGCMD variable. If debug boot option is present, call debug()`
19	`# function several times during script's execution`	19	`# function several times during script's execution`
20	if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi	20	if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi
21		21
22	`$DEBUGCMD`	22	`$DEBUGCMD`
23		23
24	`# amount of RAM to store changes`	24	`# amount of RAM to store changes`
25	RAMSIZE="`cmdline_value ramsize`"	25	RAMSIZE="`cmdline_value ramsize`"
26	`if [ "$RAMSIZE" = "" ]; then RAMSIZE="70%"; fi`	26	`if [ "$RAMSIZE" = "" ]; then RAMSIZE="70%"; fi`
27		27
28	`# I have to set these variables very carefully`	28	`# I have to set these variables very carefully`
29	`UNION=/union`	29	`UNION=/union`
30	`MEMORY=/memory`	30	`MEMORY=/memory`
31	`MOUNTDIR=livecd`	31	`MOUNTDIR=livecd`
32	`CHANGES=$MEMORY/changes`	32	`CHANGES=$MEMORY/changes`
33	`COPY2RAM=$MEMORY/copy2ram`	33	`COPY2RAM=$MEMORY/copy2ram`
34	`IMAGES=$MEMORY/images`	34	`IMAGES=$MEMORY/images`
35	`INITRAMDISK=$MOUNTDIR/live`	35	`INITRAMDISK=$MOUNTDIR/live`
36		36
37	`# set NFSROOT if nfsroot= in boot parameter`	37	`# set NFSROOT if nfsroot= in boot parameter`
38	NFSROOT="`cmdline_value nfsroot`"	38	NFSROOT="`cmdline_value nfsroot`"
39		39
40	`# we need cdrom support, isofs support, unionfs/aufs support, etc`	40	`# we need cdrom support, isofs support, unionfs/aufs support, etc`
41	`modprobe_essential_modules`	41	`modprobe_essential_modules`
42		42
43	`# disable DMA if nodma parameter is used`	43	`# disable DMA if nodma parameter is used`
44	`setup_dma`	44	`setup_dma`
45		45
46	`$DEBUGCMD`	46	`$DEBUGCMD`
47		47
48	`# if NFSROOT is set:`	48	`# if NFSROOT is set:`
49	`echolog "check for nfsroot"`	49	`echolog "check for nfsroot"`
50	`if [ "$NFSROOT" != "" ]; then`	50	`if [ "$NFSROOT" != "" ]; then`
51		51
52	`# load network modules, if NFSROOT is set`	52	`# load network modules, if NFSROOT is set`
53	`echolog "nfsroot: $NFSROOT"`	53	`echolog "nfsroot: $NFSROOT"`
54	`load_network_modules`	54	`load_network_modules`
55		55
56	`$DEBUGCMD`	56	`$DEBUGCMD`
57		57
58	`# get DHCP lease`	58	`# get DHCP lease`
59	`echolog "get DHCP lease on $iface"`	-
60	`get_dhcp_lease $iface`	59	`get_dhcp_lease`
61		60
62	`$DEBUGCMD`	61	`$DEBUGCMD`
63		62
64	`# we need nfs modules loaded, if NFSROOT is set`	63	`# we need nfs modules loaded, if NFSROOT is set`
65	`modprobe_nfs_modules`	64	`modprobe_nfs_modules`
66		65
67	`fi`	66	`fi`
68		67
69	`$DEBUGCMD`	68	`$DEBUGCMD`
70		69
71	`# $UNION will be used as a root directory, livecd modules will be added soon.`	70	`# $UNION will be used as a root directory, livecd modules will be added soon.`
72	`echolog "setup union on $UNION"`	71	`echolog "setup union on $UNION"`
73	`mkdir -p $UNION`	72	`mkdir -p $UNION`
74	`mkdir -p $MEMORY`	73	`mkdir -p $MEMORY`
75		74
76	CHANGESDEV="`cmdline_value changes`"	75	CHANGESDEV="`cmdline_value changes`"
77	`if [ "$CHANGESDEV" != "" ]; then`	76	`if [ "$CHANGESDEV" != "" ]; then`
78	`echo "mounting $CHANGESDEV to $MEMORY"`	77	`echo "mounting $CHANGESDEV to $MEMORY"`
79	`mount_device $CHANGESDEV $MEMORY`	78	`mount_device $CHANGESDEV $MEMORY`
80	`else false; fi`	79	`else false; fi`
81		80
82	`# mount tmpfs only in the case when changes= boot parameter was empty`	81	`# mount tmpfs only in the case when changes= boot parameter was empty`
83	`# or we were not able to mount the storage device`	82	`# or we were not able to mount the storage device`
84	`if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi`	83	`if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi`
85		84
86	`mkdir -p $CHANGES`	85	`mkdir -p $CHANGES`
87	`mkdir -p $COPY2RAM`	86	`mkdir -p $COPY2RAM`
88	`mkdir -p $IMAGES`	87	`mkdir -p $IMAGES`
89		88
90	`# mount unionfs or aufs`	89	`# mount unionfs or aufs`
91	`lsmod \| grep -q ^unionfs`	90	`lsmod \| grep -q ^unionfs`
92	`if [ $? -eq 0 ]; then`	91	`if [ $? -eq 0 ]; then`
93	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`	92	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`
94	`if [ $? -ne 0 ]; then fatal "can't setup union in $UNION directory"; fi`	93	`if [ $? -ne 0 ]; then fatal "can't setup union in $UNION directory"; fi`
95	`echolog "unionfs mounted"`	94	`echolog "unionfs mounted"`
96	`else`	95	`else`
97	`mount -t aufs -o br:$CHANGES=rw aufs $UNION`	96	`mount -t aufs -o br:$CHANGES=rw aufs $UNION`
98	`if [ $? -ne 0 ]; then fatal "can't setup union (aufs) in $UNION directory"; fi`	97	`if [ $? -ne 0 ]; then fatal "can't setup union (aufs) in $UNION directory"; fi`
99	`echolog "aufs mounted"`	98	`echolog "aufs mounted"`
100	`fi`	99	`fi`
101		100
102	`$DEBUGCMD`	101	`$DEBUGCMD`
103		102
104	`# try to find livecd data directory. If not found, try modprobing`	103	`# try to find livecd data directory. If not found, try modprobing`
105	`# USB and SATA kernel modules and repeat the find procedure again`	104	`# USB and SATA kernel modules and repeat the find procedure again`
106	`echolog "looking for data modules"`	105	`echolog "looking for data modules"`
107	DATA="`find_live_data_dir $MOUNTDIR`";	106	DATA="`find_live_data_dir $MOUNTDIR`";
108	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi	107	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
109	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found."; fi`	108	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found."; fi`
110	`echolog "LiveCD found in: $DATA"`	109	`echolog "LiveCD found in: $DATA"`
111		110
112	`$DEBUGCMD`	111	`$DEBUGCMD`
113		112
114	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`	113	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`
115	`# (skip modules from /optional/ which are not listed in load= boot option)`	114	`# (skip modules from /optional/ which are not listed in load= boot option)`
116	`# Finaly modify DATA variable so it will point to correct directory`	115	`# Finaly modify DATA variable so it will point to correct directory`
117	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then	116	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then
118	`echolog "copying modules to RAM, this may take some time"`	117	`echolog "copying modules to RAM, this may take some time"`
119	`copy_to_ram $DATA $COPY2RAM`	118	`copy_to_ram $DATA $COPY2RAM`
120	`cd_autoeject 1`	119	`cd_autoeject 1`
121	`umount $DATA 2>/dev/null`	120	`umount $DATA 2>/dev/null`
122	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi	121	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi
123	`DATA=$COPY2RAM`	122	`DATA=$COPY2RAM`
124	`cd_autoeject 0`	123	`cd_autoeject 0`
125	`fi`	124	`fi`
126		125
127	`mkdir -p $UNION/boot`	126	`mkdir -p $UNION/boot`
128	`mount -o bind $DATA $UNION/boot`	127	`mount -o bind $DATA $UNION/boot`
129		128
130	`$DEBUGCMD`	129	`$DEBUGCMD`
131		130
132	`# DATA contains path to the base directory of all .mo images which need`	131	`# DATA contains path to the base directory of all .mo images which need`
133	`# to be mounted and inserted into live filesystem. Do it now.`	132	`# to be mounted and inserted into live filesystem. Do it now.`
134	`echolog "inserting all modules and creating live filesystem"`	133	`echolog "inserting all modules and creating live filesystem"`
135	`union_insert_modules $UNION $DATA $IMAGES`	134	`union_insert_modules $UNION $DATA $IMAGES`
136		135
137	`$DEBUGCMD`	136	`$DEBUGCMD`
138		137
139	`echo "copying rootchanges"`	138	`echo "copying rootchanges"`
140	`copy_rootchanges $DATA $UNION`	139	`copy_rootchanges $DATA $UNION`
141		140
142	`$DEBUGCMD`	141	`$DEBUGCMD`
143		142
144	`echo "creating /etc/fstab"`	143	`echo "creating /etc/fstab"`
145	`activate_fstab $UNION`	144	`activate_fstab $UNION`
146		145
147	`# More likely these directories aren't there.`	146	`# More likely these directories aren't there.`
148	`# Even if they are, this won't hurt.`	147	`# Even if they are, this won't hurt.`
149	`mkdir -p $UNION/proc`	148	`mkdir -p $UNION/proc`
150	`mkdir -p $UNION/sys`	149	`mkdir -p $UNION/sys`
151	`mkdir -p $UNION/tmp`	150	`mkdir -p $UNION/tmp`
152	`chmod 1777 $UNION/tmp`	151	`chmod 1777 $UNION/tmp`
153	`mkdir -p $UNION/dev`	152	`mkdir -p $UNION/dev`
154	`mkdir -p $UNION/initrd`	153	`mkdir -p $UNION/initrd`
155		154
156	`$DEBUGCMD`	155	`$DEBUGCMD`
157		156
158	`# no X? (set runlevel to 3)`	157	`# no X? (set runlevel to 3)`
159	if [ "`cmdline_parameter nox`" ]; then	158	if [ "`cmdline_parameter nox`" ]; then
160	`echo "set runlevel to 3"`	159	`echo "set runlevel to 3"`
161	`sed -i "s/id:.:initdefault:/id:3:initdefault:/" $UNION/etc/inittab`	160	`sed -i "s/id:.:initdefault:/id:3:initdefault:/" $UNION/etc/inittab`
162	`fi`	161	`fi`
163		162
164	`$DEBUGCMD`	163	`$DEBUGCMD`
165		164
166	`# Union contains all the files and directories unioned from all modules.`	165	`# Union contains all the files and directories unioned from all modules.`
167	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`	166	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`
168	`# Finaly execute /sbin/init to start the distribution.`	167	`# Finaly execute /sbin/init to start the distribution.`
169	`echolog "changing root directory..."`	168	`echolog "changing root directory..."`
170	`cd $UNION`	169	`cd $UNION`
171	`mkdir -p $INITRAMDISK`	170	`mkdir -p $INITRAMDISK`
172		171
173	`umount /sys # we won't need it anymore`	172	`umount /sys # we won't need it anymore`
174	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`	173	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`
175		174
176	`if [ -x $UNION/usr/sbin/chroot ];`	175	`if [ -x $UNION/usr/sbin/chroot ];`
177	`then CHROOT=/usr/sbin/chroot`	176	`then CHROOT=/usr/sbin/chroot`
178	`else CHROOT=/usr/bin/chroot`	177	`else CHROOT=/usr/bin/chroot`
179	`fi`	178	`fi`
180		179
181	`echolog "End of linux live scripts"`	180	`echolog "End of linux live scripts"`
182		181
183	`# pure magic ;-)`	182	`# pure magic ;-)`
184	`cat $UNION/bin/true >/dev/null`	183	`cat $UNION/bin/true >/dev/null`
185		184
186	`$DEBUGCMD`	185	`$DEBUGCMD`
187		186
188	`pivot_root . $INITRAMDISK`	187	`pivot_root . $INITRAMDISK`
189	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`	188	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`
190		189
191	`header "ERROR!"`	190	`header "ERROR!"`
192	`echolog "You are not supposed to be here, something went wrong!"`	191	`echolog "You are not supposed to be here, something went wrong!"`
193	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`	192	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`
194		193

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