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

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(root)/trunk/linux-live.sl/initrd/linuxrc @ 71 – Rev 48 → 64