diff options
Diffstat (limited to 'meta/recipes-core/initrdscripts/files/init-live.sh')
-rw-r--r-- | meta/recipes-core/initrdscripts/files/init-live.sh | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh new file mode 100644 index 0000000000..3f5fde83bf --- /dev/null +++ b/meta/recipes-core/initrdscripts/files/init-live.sh | |||
@@ -0,0 +1,218 @@ | |||
1 | #!/bin/sh | ||
2 | |||
3 | PATH=/sbin:/bin:/usr/sbin:/usr/bin | ||
4 | |||
5 | ROOT_MOUNT="/rootfs/" | ||
6 | ROOT_IMAGE="rootfs.img" | ||
7 | MOUNT="/bin/mount" | ||
8 | UMOUNT="/bin/umount" | ||
9 | ISOLINUX="" | ||
10 | |||
11 | # Copied from initramfs-framework. The core of this script probably should be | ||
12 | # turned into initramfs-framework modules to reduce duplication. | ||
13 | udev_daemon() { | ||
14 | OPTIONS="/sbin/udev/udevd /sbin/udevd /lib/udev/udevd /lib/systemd/systemd-udevd" | ||
15 | |||
16 | for o in $OPTIONS; do | ||
17 | if [ -x "$o" ]; then | ||
18 | echo $o | ||
19 | return 0 | ||
20 | fi | ||
21 | done | ||
22 | |||
23 | return 1 | ||
24 | } | ||
25 | |||
26 | _UDEV_DAEMON=`udev_daemon` | ||
27 | |||
28 | early_setup() { | ||
29 | mkdir -p /proc | ||
30 | mkdir -p /sys | ||
31 | mount -t proc proc /proc | ||
32 | mount -t sysfs sysfs /sys | ||
33 | mount -t devtmpfs none /dev | ||
34 | |||
35 | # support modular kernel | ||
36 | modprobe isofs 2> /dev/null | ||
37 | |||
38 | mkdir -p /run | ||
39 | mkdir -p /var/run | ||
40 | |||
41 | $_UDEV_DAEMON --daemon | ||
42 | udevadm trigger --action=add | ||
43 | } | ||
44 | |||
45 | read_args() { | ||
46 | [ -z "$CMDLINE" ] && CMDLINE=`cat /proc/cmdline` | ||
47 | for arg in $CMDLINE; do | ||
48 | optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'` | ||
49 | case $arg in | ||
50 | root=*) | ||
51 | ROOT_DEVICE=$optarg ;; | ||
52 | rootfstype=*) | ||
53 | modprobe $optarg 2> /dev/null ;; | ||
54 | LABEL=*) | ||
55 | label=$optarg ;; | ||
56 | video=*) | ||
57 | video_mode=$arg ;; | ||
58 | vga=*) | ||
59 | vga_mode=$arg ;; | ||
60 | console=*) | ||
61 | if [ -z "${console_params}" ]; then | ||
62 | console_params=$arg | ||
63 | else | ||
64 | console_params="$console_params $arg" | ||
65 | fi ;; | ||
66 | debugshell*) | ||
67 | if [ -z "$optarg" ]; then | ||
68 | shelltimeout=30 | ||
69 | else | ||
70 | shelltimeout=$optarg | ||
71 | fi | ||
72 | esac | ||
73 | done | ||
74 | } | ||
75 | |||
76 | boot_live_root() { | ||
77 | # Watches the udev event queue, and exits if all current events are handled | ||
78 | udevadm settle --timeout=3 --quiet | ||
79 | killall "${_UDEV_DAEMON##*/}" 2>/dev/null | ||
80 | |||
81 | # Move the mount points of some filesystems over to | ||
82 | # the corresponding directories under the real root filesystem. | ||
83 | for dir in `awk '/\/dev.* \/media/{print $2}' /proc/mounts`; do | ||
84 | mkdir -p ${ROOT_MOUNT}/$dir | ||
85 | mount -n --move $dir ${ROOT_MOUNT}/$dir | ||
86 | done | ||
87 | mount -n --move /proc ${ROOT_MOUNT}/proc | ||
88 | mount -n --move /sys ${ROOT_MOUNT}/sys | ||
89 | mount -n --move /dev ${ROOT_MOUNT}/dev | ||
90 | |||
91 | cd $ROOT_MOUNT | ||
92 | exec switch_root -c /dev/console $ROOT_MOUNT /sbin/init | ||
93 | } | ||
94 | |||
95 | fatal() { | ||
96 | echo $1 >$CONSOLE | ||
97 | echo >$CONSOLE | ||
98 | exec sh | ||
99 | } | ||
100 | |||
101 | early_setup | ||
102 | |||
103 | [ -z "$CONSOLE" ] && CONSOLE="/dev/console" | ||
104 | |||
105 | read_args | ||
106 | |||
107 | echo "Waiting for removable media..." | ||
108 | C=0 | ||
109 | while true | ||
110 | do | ||
111 | for i in `ls /media 2>/dev/null`; do | ||
112 | if [ -f /media/$i/$ROOT_IMAGE ] ; then | ||
113 | found="yes" | ||
114 | break | ||
115 | elif [ -f /media/$i/isolinux/$ROOT_IMAGE ]; then | ||
116 | found="yes" | ||
117 | ISOLINUX="isolinux" | ||
118 | break | ||
119 | fi | ||
120 | done | ||
121 | if [ "$found" = "yes" ]; then | ||
122 | break; | ||
123 | fi | ||
124 | # don't wait for more than $shelltimeout seconds, if it's set | ||
125 | if [ -n "$shelltimeout" ]; then | ||
126 | echo -n " " $(( $shelltimeout - $C )) | ||
127 | if [ $C -ge $shelltimeout ]; then | ||
128 | echo "..." | ||
129 | echo "Mounted filesystems" | ||
130 | mount | grep media | ||
131 | echo "Available block devices" | ||
132 | ls /dev/sd* | ||
133 | fatal "Cannot find rootfs.img file in /media/* , dropping to a shell " | ||
134 | fi | ||
135 | C=$(( C + 1 )) | ||
136 | fi | ||
137 | sleep 1 | ||
138 | done | ||
139 | |||
140 | # Try to mount the root image read-write and then boot it up. | ||
141 | # This function distinguishes between a read-only image and a read-write image. | ||
142 | # In the former case (typically an iso), it tries to make a union mount if possible. | ||
143 | # In the latter case, the root image could be mounted and then directly booted up. | ||
144 | mount_and_boot() { | ||
145 | mkdir $ROOT_MOUNT | ||
146 | mknod /dev/loop0 b 7 0 2>/dev/null | ||
147 | |||
148 | if ! mount -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then | ||
149 | fatal "Could not mount rootfs image" | ||
150 | fi | ||
151 | |||
152 | if touch $ROOT_MOUNT/bin 2>/dev/null; then | ||
153 | # The root image is read-write, directly boot it up. | ||
154 | boot_live_root | ||
155 | fi | ||
156 | |||
157 | # determine which unification filesystem to use | ||
158 | union_fs_type="" | ||
159 | if grep -q -w "overlayfs" /proc/filesystems; then | ||
160 | union_fs_type="overlayfs" | ||
161 | elif grep -q -w "aufs" /proc/filesystems; then | ||
162 | union_fs_type="aufs" | ||
163 | else | ||
164 | union_fs_type="" | ||
165 | fi | ||
166 | |||
167 | # make a union mount if possible | ||
168 | case $union_fs_type in | ||
169 | "overlayfs") | ||
170 | mkdir -p /rootfs.ro /rootfs.rw | ||
171 | if ! mount -n --move $ROOT_MOUNT /rootfs.ro; then | ||
172 | rm -rf /rootfs.ro /rootfs.rw | ||
173 | fatal "Could not move rootfs mount point" | ||
174 | else | ||
175 | mount -t tmpfs -o rw,noatime,mode=755 tmpfs /rootfs.rw | ||
176 | mount -t overlayfs -o "lowerdir=/rootfs.ro,upperdir=/rootfs.rw" overlayfs $ROOT_MOUNT | ||
177 | mkdir -p $ROOT_MOUNT/rootfs.ro $ROOT_MOUNT/rootfs.rw | ||
178 | mount --move /rootfs.ro $ROOT_MOUNT/rootfs.ro | ||
179 | mount --move /rootfs.rw $ROOT_MOUNT/rootfs.rw | ||
180 | fi | ||
181 | ;; | ||
182 | "aufs") | ||
183 | mkdir -p /rootfs.ro /rootfs.rw | ||
184 | if ! mount -n --move $ROOT_MOUNT /rootfs.ro; then | ||
185 | rm -rf /rootfs.ro /rootfs.rw | ||
186 | fatal "Could not move rootfs mount point" | ||
187 | else | ||
188 | mount -t tmpfs -o rw,noatime,mode=755 tmpfs /rootfs.rw | ||
189 | mount -t aufs -o "dirs=/rootfs.rw=rw:/rootfs.ro=ro" aufs $ROOT_MOUNT | ||
190 | mkdir -p $ROOT_MOUNT/rootfs.ro $ROOT_MOUNT/rootfs.rw | ||
191 | mount --move /rootfs.ro $ROOT_MOUNT/rootfs.ro | ||
192 | mount --move /rootfs.rw $ROOT_MOUNT/rootfs.rw | ||
193 | fi | ||
194 | ;; | ||
195 | "") | ||
196 | mount -t tmpfs -o rw,noatime,mode=755 tmpfs $ROOT_MOUNT/media | ||
197 | ;; | ||
198 | esac | ||
199 | |||
200 | # boot the image | ||
201 | boot_live_root | ||
202 | } | ||
203 | |||
204 | case $label in | ||
205 | boot) | ||
206 | mount_and_boot | ||
207 | ;; | ||
208 | install|install-efi) | ||
209 | if [ -f /media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then | ||
210 | ./$label.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode $console_params | ||
211 | else | ||
212 | fatal "Could not find $label script" | ||
213 | fi | ||
214 | |||
215 | # If we're getting here, we failed... | ||
216 | fatal "Installation image failed" | ||
217 | ;; | ||
218 | esac | ||