blob: 58b84b5c46f4ab9e6390d29d3b0f55c7537effb3 (
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
|
# This file contains common functions used in init and in hooks
msg () {
[ "${quiet}" != "y" ] && echo $@
}
err () {
echo "ERROR: $@"
}
poll_device() {
device="$1"
if [ "$2" -ge 0 ]; then
seconds="$2"
else
seconds=5
fi
if [ "${udevd_running}" -eq 1 ]; then
echo "Waiting ${seconds} seconds for device ${device} ..."
while [ ! -b "${device}" -a ${seconds} -gt 0 ]; do
sleep 1
seconds=$((${seconds}-1))
done
fi
[ -b "${device}" ]
}
launch_interactive_shell() {
export PS1='[ramfs \W]\$ '
[ "$1" = "--exec" ] && exec /bin/sh -i
/bin/sh -i
}
default_mount_handler() {
if [ ${root:0:5} != "/dev/" ] || ! poll_device "${root}" ${rootdelay}; then
msg "Root device '${root}' doesn't exist. Attempting to create it."
major=""
minor=""
if [ ${root:0:5} = "/dev/" ]; then
# It might be a block device (/dev/sda) -> /sys/block/sda/dev
# or a partition (/dev/sda1) -> /sys/block/sda/sda1/dev
for dir in /sys/block /sys/block/*; do
if [ -f ${dir}/${root:5}/dev ]; then
major="$(cat ${dir}/${root:5}/dev | cut -d: -f1)"
minor="$(cat ${dir}/${root:5}/dev | cut -d: -f2)"
break
fi
done
# It might be a major/minor pair (8:1)
elif echo ${root} | grep -q :; then
major="$(echo ${root} | cut -d: -f1)"
minor="$(echo ${root} | cut -d: -f2)"
root="/dev/root"
# It might be major/minor encoded as a single hex-number (lilo-style) (801)
elif [ ${#root} -le 4 -a ${#root} -gt 2 ] && echo "${root}" | grep -qe '^[A-Fa-f0-9]*$'; then
str_offset=$((${#root}-2))
major=$((0x${root:0:${str_offset}}))
minor=$((0x${root:${str_offset}}))
root="/dev/root"
fi
if [ -n "${major}" -a -n "${minor}" ]; then
msg "Creating root device ${root} with major ${major} and minor ${minor}."
mknod ${root} b ${major} ${minor}
else
err "Unable to determine major/minor number of root device '${root}'."
echo "You are being dropped to a recovery shell"
echo " Type 'exit' to try and continue booting"
launch_interactive_shell
msg "Trying to continue (this will most likely fail) ..."
fi
fi
# We didn't build filesystem support into busybox,
# instead we use util-linux-ng's blkid for best compatibility
if [ -n "${rootfstype}" ]; then
fstype="${rootfstype}"
else
fstype=$(sbin/blkid -u filesystem -o value -s TYPE -p "${root}")
if [ -z "${fstype}" ]; then
err "Unable to determine the file system type of ${root}:"
echo "Either it contains no filesystem, an unknown filesystem,"
echo "or more than one valid file system signature was found."
echo
echo "Try adding"
echo " rootfstype=your_filesystem_type"
echo "to the kernel command line."
echo
echo "You are now being dropped into an emergency shell."
launch_interactive_shell
msg "Trying to continue (this will most likely fail) ..."
fi
fi
if [ "${readwrite}" = "yes" ]; then
rwopt="rw"
else
rwopt="ro"
fi
if [ -L "${root}" ]; then
root=$(readlink -f "${root}")
fi
mount ${fstype:+-t ${fstype}} -o ${rwopt}${rootflags:+,${rootflags}} "${root}" "$1"
}
|
