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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#!/bin/sh -e
UDEVSTART=/sbin/udevstart
# defaults
tmpfs_size="10M"
udev_root="/dev"
[ -x $UDEVSTART ] || exit 0
. /etc/udev/udev.conf
##############################################################################
# we need to unmount /dev/pts/ and remount it later over the tmpfs
unmount_devpts() {
if mountpoint -q /dev/pts/; then
umount -l /dev/pts/
fi
if mountpoint -q /dev/shm/; then
umount -l /dev/shm/
fi
}
# mount a tmpfs over /dev, if somebody did not already do it
mount_tmpfs() {
if grep -E -q "^[^[:space:]]+ /dev tmpfs" /proc/mounts; then
return 0
fi
# /dev/.static/dev/ is used by MAKEDEV to access the real /dev/ directory.
# /etc/udev/ is recycled as a temporary mount point because it's the only
# directory which is guaranteed to be available.
mount -n -o bind /dev /etc/udev
if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs /dev; then
umount /etc/udev
echo "udev requires tmpfs support, not started."
exit 1
fi
# using ln to test if /dev works, because touch is in /usr/bin/
if ln -s test /dev/test-file; then
rm /dev/test-file
else
echo "udev requires tmpfs support, not started."
umount /etc/udev
umount /dev
exit 1
fi
mkdir -p /dev/.static/dev
chmod 700 /dev/.static/
mount -n -o move /etc/udev /dev/.static/dev
}
# I hate this hack. -- Md
make_extra_nodes() {
[ -e /etc/udev/links.conf ] || return 0
grep '^[^#]' /etc/udev/links.conf | \
while read type name arg1; do
[ "$type" -a "$name" -a ! -e "/dev/$name" -a ! -L "/dev/$name" ] ||continue
case "$type" in
L) ln -s $arg1 /dev/$name ;;
D) mkdir -p /dev/$name ;;
M) mknod -m 600 /dev/$name $arg1 ;;
*) echo "links.conf: unparseable line ($type $name $arg1)" ;;
esac
done
}
# this function is duplicated in preinst, postinst and d-i
supported_kernel() {
case "$(uname -r)" in
2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
2.6.1[01]|2.6.1[01][!0-9]*) return 1 ;;
esac
return 0
}
# shell version of /usr/bin/tty
my_tty() {
[ -x /bin/readlink ] || return 0
[ -e /proc/self/fd/0 ] || return 0
readlink --silent /proc/self/fd/0 || true
}
warn_if_interactive() {
if [ "$RUNLEVEL" = "S" -a "$PREVLEVEL" = "N" ]; then
return 0
fi
TTY=$(my_tty)
if [ -z "$TTY" -o "$TTY" = "/dev/console" ]; then
return 0
fi
printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n"
printf "has been run from an interactive shell.\n"
printf "It will probably not do what you expect, so this script will wait\n"
printf "60 seconds before continuing. Press ^C to stop it.\n"
printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
sleep 60
}
##############################################################################
if ! supported_kernel; then
echo "udev requires a kernel >= 2.6.12, not started."
exit 1
fi
if [ ! -e /proc/filesystems ]; then
echo "udev requires a mounted procfs, not started."
exit 1
fi
if ! grep -q '[[:space:]]tmpfs$' /proc/filesystems; then
echo "udev requires tmpfs support, not started."
exit 1
fi
if [ ! -d /sys/class/ ]; then
echo "udev requires a mounted sysfs, not started."
exit 1
fi
if [ ! -e /proc/sys/kernel/hotplug ]; then
echo "udev requires hotplug support, not started."
exit 1
fi
##############################################################################
# When modifying this script, do not forget that between the time that
# the new /dev has been mounted and udevstart has been run there will be
# no /dev/null. This also means that you cannot use the "&" shell command.
case "$1" in
start)
if [ -e "$udev_root/.udevdb" ]; then
if mountpoint -q /dev/; then
TMPFS_MOUNTED=1
else
echo ".udevdb already exists on the old $udev_root!"
fi
fi
warn_if_interactive
#echo /sbin/udevsend > /proc/sys/kernel/hotplug
echo "" > /proc/sys/kernel/hotplug
udevsend
if [ "$UDEV_DISABLED" = "yes" ]; then
echo "udev disabled on the kernel command line, not started."
exit 0
fi
if [ ! "$TMPFS_MOUNTED" ]; then
unmount_devpts
mount_tmpfs
[ -d /proc/1 ] || mount -n /proc
# if this directory is not present /dev will not be updated by udev
mkdir /dev/.udevdb/
echo "Creating initial device nodes..."
udevstart
fi
make_extra_nodes
;;
stop)
warn_if_interactive
start-stop-daemon --stop --exec /sbin/udevd --quiet
unmount_devpts
if [ -d /dev/.static/dev/ ]; then
umount -l /dev/.static/dev/ || true
fi
echo "Unmounting /dev..."
# unmounting with -l should never fail
if ! umount -l /dev; then
exit 1
fi
;;
restart|force-reload)
start-stop-daemon --stop --exec /sbin/udevd --quiet
log_begin_msg "Recreating device nodes..."
udevstart
make_extra_nodes
log_end_msg 0
;;
*)
echo "Usage: /etc/init.d/udev {start|stop|restart|force-reload}"
exit 1
;;
esac
exit 0
|
