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=mnt
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)"; 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
 
# 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 36	Rev 37
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=mnt`	31	`#MOUNTDIR=mnt`
32	`MOUNTDIR=livecd`	32	`MOUNTDIR=livecd`
33	`CHANGES=$MEMORY/changes`	33	`CHANGES=$MEMORY/changes`
34	`COPY2RAM=$MEMORY/copy2ram`	34	`COPY2RAM=$MEMORY/copy2ram`
35	`IMAGES=$MEMORY/images`	35	`IMAGES=$MEMORY/images`
36	`INITRAMDISK=$MOUNTDIR/live`	36	`INITRAMDISK=$MOUNTDIR/live`
37		37
38	`# set NFSROOT if nfsroot= in boot parameter`	38	`# set NFSROOT if nfsroot= in boot parameter`
39	NFSROOT="`cmdline_value nfsroot`"	39	NFSROOT="`cmdline_value nfsroot`"
40		40
41	`# we need cdrom support, isofs support, unionfs support, etc`	41	`# we need cdrom support, isofs support, unionfs/aufs support, etc`
42	`modprobe_essential_modules`	42	`modprobe_essential_modules`
43	`setup_dma`	43	`setup_dma`
44		44
45	`$DEBUGCMD`	45	`$DEBUGCMD`
46		46
47	`# if NFSROOT is set:`	47	`# if NFSROOT is set:`
48	`echolog "check for nfsroot"`	48	`echolog "check for nfsroot"`
49	`if [ "$NFSROOT" != "" ]; then`	49	`if [ "$NFSROOT" != "" ]; then`
50		50
51	`# load network modules, if NFSROOT is set`	51	`# load network modules, if NFSROOT is set`
52	`echolog "nfsroot: $NFSROOT"`	52	`echolog "nfsroot: $NFSROOT"`
53	`load_network_modules`	53	`load_network_modules`
54		54
55	`$DEBUGCMD`	55	`$DEBUGCMD`
56		56
57	`# get DHCP lease`	57	`# get DHCP lease`
58	`echolog "get DHCP lease"`	58	`echolog "get DHCP lease"`
59	`get_dhcp_lease`	59	`get_dhcp_lease`
60		60
61	`$DEBUGCMD`	61	`$DEBUGCMD`
62		62
63	`# we need nfs modules loaded, if NFSROOT is set`	63	`# we need nfs modules loaded, if NFSROOT is set`
64	`modprobe_nfs_modules`	64	`modprobe_nfs_modules`
65		65
66	`fi`	66	`fi`
67		67
68	`$DEBUGCMD`	68	`$DEBUGCMD`
69		69
70	`# $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.`
71	`echolog "setup union on $UNION"`	71	`echolog "setup union on $UNION"`
72	`mkdir -p $UNION`	72	`mkdir -p $UNION`
73	`mkdir -p $MEMORY`	73	`mkdir -p $MEMORY`
74		74
75	CHANGESDEV="`cmdline_value changes`"	75	CHANGESDEV="`cmdline_value changes`"
76	`if [ "$CHANGESDEV" != "" ]; then`	76	`if [ "$CHANGESDEV" != "" ]; then`
77	`echo "mounting $CHANGESDEV to $MEMORY"`	77	`echo "mounting $CHANGESDEV to $MEMORY"`
78	`mount_device $CHANGESDEV $MEMORY`	78	`mount_device $CHANGESDEV $MEMORY`
79	`else false; fi`	79	`else false; fi`
80		80
81	`# 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`
82	`# or we were not able to mount the storage device`	82	`# or we were not able to mount the storage device`
83	`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`
84		84
85	`mkdir -p $CHANGES`	85	`mkdir -p $CHANGES`
86	`mkdir -p $COPY2RAM`	86	`mkdir -p $COPY2RAM`
87	`mkdir -p $IMAGES`	87	`mkdir -p $IMAGES`
-		88
-		89	`# mount unionfs or aufs`
-		90	`lsmod \| grep -q ^unionfs`
-		91	`if [ $? -eq 0 ]; then`
88	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`	92	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`
89	`if [ $? -ne 0 ]; then fatal "can't setup union in /union directory"; fi`	93	`if [ $? -ne 0 ]; then fatal "can't setup union in /union directory"; fi`
-		94	`else`
-		95	`mount -t aufs -o br:$CHANGES=rw aufs $UNION`
-		96	`if [ $? -ne 0 ]; then fatal "can't setup union (aufs)"; fi`
-		97	`fi`
90		98
91	`$DEBUGCMD`	99	`$DEBUGCMD`
92		100
93	`# try to find livecd data directory. If not found, try modprobing`	101	`# try to find livecd data directory. If not found, try modprobing`
94	`# USB and SATA kernel modules and repeat the find procedure again`	102	`# USB and SATA kernel modules and repeat the find procedure again`
95	`echolog "looking for data modules"`	103	`echolog "looking for data modules"`
96	DATA="`find_live_data_dir $MOUNTDIR`";	104	DATA="`find_live_data_dir $MOUNTDIR`";
97	# if [ "$DATA" = "" ]; then modprobe_usb_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi	105	# if [ "$DATA" = "" ]; then modprobe_usb_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
98	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi	106	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
99	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found. Are you using SCSI?"; fi`	107	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found. Are you using SCSI?"; fi`
100	`echolog "LiveCD found in: $DATA"`	108	`echolog "LiveCD found in: $DATA"`
101		109
102	`$DEBUGCMD`	110	`$DEBUGCMD`
103		111
104	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`	112	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`
105	`# (skip modules from /optional/ which are not listed in load= boot option)`	113	`# (skip modules from /optional/ which are not listed in load= boot option)`
106	`# Finaly modify DATA variable so it will point to correct directory`	114	`# Finaly modify DATA variable so it will point to correct directory`
107	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then	115	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then
108	`echolog "copying modules to RAM, this may take some time"`	116	`echolog "copying modules to RAM, this may take some time"`
109	`copy_to_ram $DATA $COPY2RAM`	117	`copy_to_ram $DATA $COPY2RAM`
110	`cd_autoeject 1`	118	`cd_autoeject 1`
111	`umount $DATA 2>/dev/null`	119	`umount $DATA 2>/dev/null`
112	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi	120	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi
113	`DATA=$COPY2RAM`	121	`DATA=$COPY2RAM`
114	`cd_autoeject 0`	122	`cd_autoeject 0`
115	`fi`	123	`fi`
116		124
117	`mkdir -p $UNION/boot`	125	`mkdir -p $UNION/boot`
118	`mount -o bind $DATA $UNION/boot`	126	`mount -o bind $DATA $UNION/boot`
119		127
120	`$DEBUGCMD`	128	`$DEBUGCMD`
121		129
122	`# DATA contains path to the base directory of all .mo images which need`	130	`# DATA contains path to the base directory of all .mo images which need`
123	`# to be mounted and inserted into live filesystem. Do it now.`	131	`# to be mounted and inserted into live filesystem. Do it now.`
124	`echolog "inserting all modules and creating live filesystem"`	132	`echolog "inserting all modules and creating live filesystem"`
125	`union_insert_modules $UNION $DATA $IMAGES`	133	`union_insert_modules $UNION $DATA $IMAGES`
126		134
127	`$DEBUGCMD`	135	`$DEBUGCMD`
128		136
129	`echo "copying rootchanges"`	137	`echo "copying rootchanges"`
130	`copy_rootchanges $DATA $UNION`	138	`copy_rootchanges $DATA $UNION`
131		139
132	`$DEBUGCMD`	140	`$DEBUGCMD`
133		141
134	`echo "creating /etc/fstab"`	142	`echo "creating /etc/fstab"`
135	`activate_fstab $UNION`	143	`activate_fstab $UNION`
136		144
137	`# More likely these directories aren't there.`	145	`# More likely these directories aren't there.`
138	`# Even if they are, this won't hurt.`	146	`# Even if they are, this won't hurt.`
139	`mkdir -p $UNION/proc`	147	`mkdir -p $UNION/proc`
140	`mkdir -p $UNION/sys`	148	`mkdir -p $UNION/sys`
141	`mkdir -p $UNION/tmp`	149	`mkdir -p $UNION/tmp`
142	`chmod 1777 $UNION/tmp`	150	`chmod 1777 $UNION/tmp`
143	`mkdir -p $UNION/dev`	151	`mkdir -p $UNION/dev`
144	`mkdir -p $UNION/initrd`	152	`mkdir -p $UNION/initrd`
145		153
146	`$DEBUGCMD`	154	`$DEBUGCMD`
147		155
148	`# Union contains all the files and directories unioned from all modules.`	156	`# Union contains all the files and directories unioned from all modules.`
149	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`	157	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`
150	`# Finaly execute /sbin/init to start the distribution.`	158	`# Finaly execute /sbin/init to start the distribution.`
151	`echolog "changing root directory..."`	159	`echolog "changing root directory..."`
152	`cd $UNION`	160	`cd $UNION`
153	`mkdir -p $INITRAMDISK`	161	`mkdir -p $INITRAMDISK`
154		162
155	`umount /sys # we won't need it anymore`	163	`umount /sys # we won't need it anymore`
156	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`	164	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`
157		165
158	`if [ -x $UNION/usr/sbin/chroot ];`	166	`if [ -x $UNION/usr/sbin/chroot ];`
159	`then CHROOT=/usr/sbin/chroot`	167	`then CHROOT=/usr/sbin/chroot`
160	`else CHROOT=/usr/bin/chroot`	168	`else CHROOT=/usr/bin/chroot`
161	`fi`	169	`fi`
162		170
163	`echolog "End of linux live scripts"`	171	`echolog "End of linux live scripts"`
164		172
165	`# pure magic ;-)`	173	`# pure magic ;-)`
166	`cat $UNION/bin/true >/dev/null`	174	`cat $UNION/bin/true >/dev/null`
167		175
168	`$DEBUGCMD`	176	`$DEBUGCMD`
169		177
170	`pivot_root . $INITRAMDISK`	178	`pivot_root . $INITRAMDISK`
171	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`	179	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`
172		180
173	`header "ERROR!"`	181	`header "ERROR!"`
174	`echolog "You are not supposed to be here, something went wrong!"`	182	`echolog "You are not supposed to be here, something went wrong!"`
175	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`	183	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`
176		184

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