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
   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 $UNION directory"; fi
    echolog "unionfs mounted"
else
    mount -t aufs -o br:$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. 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 84	Rev 100
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	`$DEBUGCMD`
57		57
58	`# get DHCP lease`	58	`# get DHCP lease`
59	`echolog "get DHCP lease"`	59	`echolog "get DHCP lease"`
60	`get_dhcp_lease`	60	`get_dhcp_lease`
61		61
62	`$DEBUGCMD`	62	`$DEBUGCMD`
63		63
64	`# we need nfs modules loaded, if NFSROOT is set`	64	`# we need nfs modules loaded, if NFSROOT is set`
65	`modprobe_nfs_modules`	65	`modprobe_nfs_modules`
66		66
67	`fi`	67	`fi`
68		68
69	`$DEBUGCMD`	69	`$DEBUGCMD`
70		70
71	`# $UNION will be used as a root directory, livecd modules will be added soon.`	71	`# $UNION will be used as a root directory, livecd modules will be added soon.`
72	`echolog "setup union on $UNION"`	72	`echolog "setup union on $UNION"`
73	`mkdir -p $UNION`	73	`mkdir -p $UNION`
74	`mkdir -p $MEMORY`	74	`mkdir -p $MEMORY`
75		75
76	CHANGESDEV="`cmdline_value changes`"	76	CHANGESDEV="`cmdline_value changes`"
77	`if [ "$CHANGESDEV" != "" ]; then`	77	`if [ "$CHANGESDEV" != "" ]; then`
78	`echo "mounting $CHANGESDEV to $MEMORY"`	78	`echo "mounting $CHANGESDEV to $MEMORY"`
79	`mount_device $CHANGESDEV $MEMORY`	79	`mount_device $CHANGESDEV $MEMORY`
80	`else false; fi`	80	`else false; fi`
81		81
82	`# mount tmpfs only in the case when changes= boot parameter was empty`	82	`# mount tmpfs only in the case when changes= boot parameter was empty`
83	`# or we were not able to mount the storage device`	83	`# or we were not able to mount the storage device`
84	`if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi`	84	`if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi`
85		85
86	`mkdir -p $CHANGES`	86	`mkdir -p $CHANGES`
87	`mkdir -p $COPY2RAM`	87	`mkdir -p $COPY2RAM`
88	`mkdir -p $IMAGES`	88	`mkdir -p $IMAGES`
89		89
90	`# mount unionfs or aufs`	90	`# mount unionfs or aufs`
91	`lsmod \| grep -q ^unionfs`	91	`lsmod \| grep -q ^unionfs`
92	`if [ $? -eq 0 ]; then`	92	`if [ $? -eq 0 ]; then`
93	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`	93	`mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION`
94	`if [ $? -ne 0 ]; then fatal "can't setup union in $UNION directory"; fi`	94	`if [ $? -ne 0 ]; then fatal "can't setup union in $UNION directory"; fi`
-		95	`echolog "unionfs mounted"`
95	`else`	96	`else`
96	`mount -t aufs -o br:$CHANGES=rw aufs $UNION`	97	`mount -t aufs -o br:$CHANGES=rw aufs $UNION`
97	`if [ $? -ne 0 ]; then fatal "can't setup union (aufs) in $UNION directory"; fi`	98	`if [ $? -ne 0 ]; then fatal "can't setup union (aufs) in $UNION directory"; fi`
-		99	`echolog "aufs mounted"`
98	`fi`	100	`fi`
99		101
100	`$DEBUGCMD`	102	`$DEBUGCMD`
101		103
102	`# try to find livecd data directory. If not found, try modprobing`	104	`# try to find livecd data directory. If not found, try modprobing`
103	`# USB and SATA kernel modules and repeat the find procedure again`	105	`# USB and SATA kernel modules and repeat the find procedure again`
104	`echolog "looking for data modules"`	106	`echolog "looking for data modules"`
105	DATA="`find_live_data_dir $MOUNTDIR`";	107	DATA="`find_live_data_dir $MOUNTDIR`";
106	# if [ "$DATA" = "" ]; then modprobe_usb_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi	-
107	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi	108	if [ "$DATA" = "" ]; then modprobe_usb_sata_modules; DATA="`find_live_data_dir $MOUNTDIR`"; fi
108	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found. Are you using SCSI?"; fi`	109	`if [ "$DATA" = "" ]; then fatal "Data for LiveCD not found. Are you using SCSI?"; fi`
109	`echolog "LiveCD found in: $DATA"`	110	`echolog "LiveCD found in: $DATA"`
110		111
111	`$DEBUGCMD`	112	`$DEBUGCMD`
112		113
113	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`	114	`# If toram or copy2ram boot parameter is present, copy all .mo modules to RAM.`
114	`# (skip modules from /optional/ which are not listed in load= boot option)`	115	`# (skip modules from /optional/ which are not listed in load= boot option)`
115	`# Finaly modify DATA variable so it will point to correct directory`	116	`# Finaly modify DATA variable so it will point to correct directory`
116	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then	117	if [ "`cmdline_parameter toram`" != "" -o "`cmdline_parameter copy2ram`" != "" ]; then
117	`echolog "copying modules to RAM, this may take some time"`	118	`echolog "copying modules to RAM, this may take some time"`
118	`copy_to_ram $DATA $COPY2RAM`	119	`copy_to_ram $DATA $COPY2RAM`
119	`cd_autoeject 1`	120	`cd_autoeject 1`
120	`umount $DATA 2>/dev/null`	121	`umount $DATA 2>/dev/null`
121	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi	122	if [ $? -ne 0 ]; then umount `dirname $DATA` 2>/dev/null; fi
122	`DATA=$COPY2RAM`	123	`DATA=$COPY2RAM`
123	`cd_autoeject 0`	124	`cd_autoeject 0`
124	`fi`	125	`fi`
125		126
126	`mkdir -p $UNION/boot`	127	`mkdir -p $UNION/boot`
127	`mount -o bind $DATA $UNION/boot`	128	`mount -o bind $DATA $UNION/boot`
128		129
129	`$DEBUGCMD`	130	`$DEBUGCMD`
130		131
131	`# DATA contains path to the base directory of all .mo images which need`	132	`# DATA contains path to the base directory of all .mo images which need`
132	`# to be mounted and inserted into live filesystem. Do it now.`	133	`# to be mounted and inserted into live filesystem. Do it now.`
133	`echolog "inserting all modules and creating live filesystem"`	134	`echolog "inserting all modules and creating live filesystem"`
134	`union_insert_modules $UNION $DATA $IMAGES`	135	`union_insert_modules $UNION $DATA $IMAGES`
135		136
136	`$DEBUGCMD`	137	`$DEBUGCMD`
137		138
138	`echo "copying rootchanges"`	139	`echo "copying rootchanges"`
139	`copy_rootchanges $DATA $UNION`	140	`copy_rootchanges $DATA $UNION`
140		141
141	`$DEBUGCMD`	142	`$DEBUGCMD`
142		143
143	`echo "creating /etc/fstab"`	144	`echo "creating /etc/fstab"`
144	`activate_fstab $UNION`	145	`activate_fstab $UNION`
145		146
146	`# More likely these directories aren't there.`	147	`# More likely these directories aren't there.`
147	`# Even if they are, this won't hurt.`	148	`# Even if they are, this won't hurt.`
148	`mkdir -p $UNION/proc`	149	`mkdir -p $UNION/proc`
149	`mkdir -p $UNION/sys`	150	`mkdir -p $UNION/sys`
150	`mkdir -p $UNION/tmp`	151	`mkdir -p $UNION/tmp`
151	`chmod 1777 $UNION/tmp`	152	`chmod 1777 $UNION/tmp`
152	`mkdir -p $UNION/dev`	153	`mkdir -p $UNION/dev`
153	`mkdir -p $UNION/initrd`	154	`mkdir -p $UNION/initrd`
154		155
155	`$DEBUGCMD`	156	`$DEBUGCMD`
156		157
157	`# no X? (set runlevel to 3)`	158	`# no X? (set runlevel to 3)`
158	if [ "`cmdline_parameter nox`" ]; then	159	if [ "`cmdline_parameter nox`" ]; then
159	`echo "set runlevel to 3"`	160	`echo "set runlevel to 3"`
160	`sed -i "s/id:.:initdefault:/id:3:initdefault:/" $UNION/etc/inittab`	161	`sed -i "s/id:.:initdefault:/id:3:initdefault:/" $UNION/etc/inittab`
161	`fi`	162	`fi`
162		163
163	`$DEBUGCMD`	164	`$DEBUGCMD`
164		165
165	`# Union contains all the files and directories unioned from all modules.`	166	`# Union contains all the files and directories unioned from all modules.`
166	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`	167	`# Change root directory to it, and move initrd's root to /livecd/live/initramdisk`
167	`# Finaly execute /sbin/init to start the distribution.`	168	`# Finaly execute /sbin/init to start the distribution.`
168	`echolog "changing root directory..."`	169	`echolog "changing root directory..."`
169	`cd $UNION`	170	`cd $UNION`
170	`mkdir -p $INITRAMDISK`	171	`mkdir -p $INITRAMDISK`
171		172
172	`umount /sys # we won't need it anymore`	173	`umount /sys # we won't need it anymore`
173	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`	174	`if [ ! -e $UNION/dev/console ]; then mknod $UNION/dev/console c 5 1; fi`
174		175
175	`if [ -x $UNION/usr/sbin/chroot ];`	176	`if [ -x $UNION/usr/sbin/chroot ];`
176	`then CHROOT=/usr/sbin/chroot`	177	`then CHROOT=/usr/sbin/chroot`
177	`else CHROOT=/usr/bin/chroot`	178	`else CHROOT=/usr/bin/chroot`
178	`fi`	179	`fi`
179		180
180	`echolog "End of linux live scripts"`	181	`echolog "End of linux live scripts"`
181		182
182	`# pure magic ;-)`	183	`# pure magic ;-)`
183	`cat $UNION/bin/true >/dev/null`	184	`cat $UNION/bin/true >/dev/null`
184		185
185	`$DEBUGCMD`	186	`$DEBUGCMD`
186		187
187	`pivot_root . $INITRAMDISK`	188	`pivot_root . $INITRAMDISK`
188	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`	189	`exec $CHROOT . sbin/init <dev/console >dev/console 2>&1`
189		190
190	`header "ERROR!"`	191	`header "ERROR!"`
191	`echolog "You are not supposed to be here, something went wrong!"`	192	`echolog "You are not supposed to be here, something went wrong!"`
192	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`	193	`echolog "Even Ctrl+Alt+Del won't help you in kernel panic."`
193		194

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