blob: bed8f7a6f7b8b03400484407aa1fe176894f262e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
# args: source, mountpoint
_mnt_bind()
{
msg "::: Binding ${1} to ${2}"
mkdir -p /real_root${2}
/bin/mount -o bind ${1} /real_root${2}
}
# args: /path/to/image_file
_mnt_squashfs()
{
/bin/modprobe -q loop >/dev/null 2>&1
img="${1}"
base_img="${img##*/}";
mnt="${2}"
if [ "${copytoram}" = "y" ]; then
msg ":: Copying squashfs image to RAM"
/bin/cat ${img} > "/tmpfs/${base_img}"
img="/tmpfs/${base_img}"
fi
msg "::: Adding new aufs branch: ${base_img%.*}"
mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
# sometimes it takes udev a while to create device nodes
while [ ! -e "/dev/loop${LOOP_NUM}" ]; do
sleep 1
done
if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${img}; then
echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
break
fi
/bin/mount -r -t squashfs "/dev/loop${LOOP_NUM}" "/tmpfs/mnt/loop${LOOP_NUM}"
if [ "${mnt}" = "/" ]; then
/bin/mount -t aufs -o remount,append:/tmpfs/mnt/loop${LOOP_NUM}=ro none "/real_root"
else
_mnt_bind "/tmpfs/mnt/loop${LOOP_NUM}" "${mnt}"
fi
export LOOP_NUM=$(( $LOOP_NUM + 1 ))
}
run_hook ()
{
if [ "x${arch}" = "x" ]; then
arch="$(uname -m)"
fi
if [ "x${tmpfs_size}" = "x" ]; then
tmpfs_size="75%"
fi
if [ "x${isomounts}" != "x" ]; then
isomounts="/bootmnt/${isomounts}"
else
isomounts="/bootmnt/isomounts"
fi
msg -n ":: Mounting tmpfs, size=${tmpfs_size}..."
mount -t tmpfs -o "size=${tmpfs_size}" tmpfs /tmpfs
msg "done."
msg ":: Waiting for boot device..."
/bin/mkdir -p /bootmnt
while ! poll_device /dev/archiso 30; do
echo "ERROR: boot device didn't show up after 30 seconds..."
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
PS1="ramfs$ " /bin/sh -i
done
eval $(fstype < /dev/archiso 2>/dev/null)
if [ -n "${FSTYPE}" ]; then
if [ "${FSTYPE}" = "unknown" ]; then
# First try mounting then with vfat, maybe someone put the image on
# USB stick with unetbootin or similar. vfat is not detected by fstype.
_FSTYPE="vfat"
else
_FSTYPE=$FSTYPE
fi
if mount -r -t "${_FSTYPE}" /dev/archiso /bootmnt >/dev/null 2>&1; then
if [ -e "${isomounts}" ]; then
echo "SUCCESS: Mounted archiso volume successfully."
else
echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist."
exit 1
fi
else
if [ "${FSTYPE}" = "unknown" ]; then
echo "ERROR: Failed to mount /dev/archiso (FS is unknown and not vfat)."
else
echo "ERROR; Failed to mount /dev/archiso (FS is ${FSTYPE}."
fi
exit 1
fi
else
echo "ERROR: /dev/archiso found, but the filesystem type is unknown."
fi
/bin/modprobe -q squashfs >/dev/null 2>&1
/bin/modprobe -q aufs >/dev/null 2>&1
msg ":: Mounting root (aufs) filesystem"
/bin/mount -t aufs -o dirs=/tmpfs=rw none /real_root
if [ $? -ne 0 ]; then
echo "ERROR: while mounting root (aufs) filesystem."
exit 1
fi
export LOOP_NUM="0"
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
[ "${img#"#"}" != "${img}" ] && continue
[ "$imgarch" != "$arch" ] && continue
[ ! -r "/bootmnt/${img}" ] && continue
if [ "${type}" = "bind" ]; then
_mnt_bind "/bootmnt/${img}" ${mountpoint}
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "/bootmnt/${img}" "${mountpoint}"
fi
done < "${isomounts}"
# Bind our bootmnt dir into the live system
_mnt_bind /bootmnt /bootmnt
if [ "${FSTYPE}" = "iso9660" -o "${FSTYPE}" = "udf" ]; then
if [ -d /proc/sys/dev/cdrom ]; then
echo 0 > /proc/sys/dev/cdrom/lock
echo 0 > /proc/sys/dev/cdrom/autoeject
fi
fi
if [ "${break}" = "y" ]; then
echo ":: Break requested, type 'exit' to resume operation"
echo " NOTE: klibc contains no 'ls' binary, use 'echo *' instead"
PS1="ramfs$ " /bin/sh -i
fi
udevpid=$(/bin/minips -C udevd -o pid=)
[ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid 2>&1 >/dev/null
#Yep, we're bailing out here. We don't need kinit.
msg ":: Passing control to Arch Linux Initscripts...Please Wait"
/bin/umount /sys
/bin/umount /proc
exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
}
# vim:ft=sh:ts=4:sw=4:et:
|