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05149ed5 AM |
1 | #!/bin/sh |
2 | # | |
3 | # start_udev | |
4 | # | |
5 | # script to initialize /dev by using udev. | |
6 | # | |
7 | # Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> | |
8 | # | |
9 | # Released under the GPL v2 only. | |
10 | # | |
7e0b6014 | 11 | # This needs to be run at the earliest possible point in the boot |
05149ed5 AM |
12 | # process. |
13 | # | |
14 | # Based on the udev init.d script | |
15 | # | |
7e0b6014 | 16 | # Thanks go out to the Gentoo developers for proving |
05149ed5 AM |
17 | # that this is possible to do. |
18 | # | |
19 | # Yes, it's very verbose, feel free to turn off all of the echo calls, | |
20 | # they were there to make me feel better that everything was working | |
21 | # properly during development... | |
940e3565 ER |
22 | |
23 | # default value, if no config present. | |
12bbae40 | 24 | udev_root="/dev" |
b44e0a3d | 25 | sysfs_dir="/sys" |
d35df3ca | 26 | udevd_timeout=8 |
940e3565 | 27 | |
05149ed5 | 28 | # don't use udev if sysfs is not mounted. |
dda87135 | 29 | [ -d $sysfs_dir/class ] || exit 1 |
05149ed5 | 30 | [ -r /proc/mounts ] || exit 1 |
05149ed5 AM |
31 | [ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf |
32 | ||
401263e1 | 33 | . /etc/rc.d/init.d/functions |
05149ed5 AM |
34 | |
35 | prog=udev | |
05149ed5 | 36 | bin=/sbin/udev |
ab4c8ae1 | 37 | udevd=/lib/udev/udevd |
0d3aa7d6 ER |
38 | # trim traling slash, code expects it not to be there |
39 | udev_root=${udev_root%/} | |
05149ed5 | 40 | |
8495ab1b JR |
41 | create_static_nodes() { |
42 | /sbin/kmod static-nodes --format=tmpfiles | \ | |
43 | while read type file mode uid gid age dev ; do | |
44 | case $type in | |
45 | d|D) | |
46 | mkdir -p --mode=$mode $file | |
47 | ;; | |
48 | *) | |
49 | oldIFS=$IFS | |
50 | IFS=":" | |
51 | set -- $dev | |
52 | maj=$1 | |
53 | min=$2 | |
54 | IFS=$oldIFS | |
55 | mknod --mode=$mode $file $type $maj $min | |
56 | ;; | |
57 | esac | |
58 | [ $uid = "-" ] || chown $uid $file | |
59 | [ $gid = "-" ] || chgrp $gid $file | |
60 | done | |
61 | } | |
62 | ||
63 | make_extra_nodes() { | |
ba060a4b | 64 | grep '^[^#]' /etc/udev/links.conf | \ |
65 | while read type name arg1; do | |
7e0b6014 ER |
66 | [ "$type" -a "$name" -a ! -e "$udev_root/$name" -a ! -L "/dev/$name" ] ||continue |
67 | case "$type" in | |
68 | L) ln -s $arg1 $udev_root/$name ;; | |
69 | D) mkdir -p $udev_root/$name ;; | |
70 | M) mknod -m 600 /dev/$name $arg1 ;; | |
71 | *) echo "links.conf: unparseable line ($type $name $arg1)" ;; | |
72 | esac | |
ba060a4b | 73 | done |
584c4247 AM |
74 | [ -d /lib/udev/devices ] && cp -a /lib/udev/devices/* /dev/ >/dev/null 2>&1 || : |
75 | [ -d /lib64/udev/devices ] && cp -a /lib64/udev/devices/* /dev/ >/dev/null 2>&1 || : | |
05149ed5 AM |
76 | } |
77 | ||
d8394a8d AM |
78 | kill_udevd() { |
79 | if [ -x /sbin/pidof ]; then | |
7e0b6014 | 80 | pid=$(/sbin/pidof -x udevd) |
d8394a8d AM |
81 | [ -n "$pid" ] && kill $pid |
82 | fi | |
83 | } | |
84 | ||
294ac9d6 | 85 | set_hotplug_handler() { |
7e0b6014 | 86 | echo "" > /proc/sys/kernel/hotplug |
294ac9d6 | 87 | } |
15874c6e | 88 | |
bdd7aa53 ER |
89 | # find subdirs mounted under $udev_root |
90 | get_dev_mounts() { | |
91 | awk -vudev_root="$udev_root/" ' | |
92 | BEGIN { | |
93 | len = length(udev_root); | |
94 | } | |
95 | ||
96 | substr($2, 1, len) == udev_root { | |
97 | print substr($2, len + 1) | |
98 | }' /proc/mounts | |
99 | } | |
100 | ||
f7cd1a07 ER |
101 | show "Starting udev"; busy |
102 | ||
05149ed5 | 103 | export ACTION=add |
6ba94d68 AM |
104 | prog=udev |
105 | ret=0 | |
294ac9d6 | 106 | |
12bbae40 ER |
107 | # mount the devtmpfs on $udev_root, if not already done |
108 | awk "\$2 == \"$udev_root\" && \$3 == \"devtmpfs\" { exit 1 }" /proc/mounts && { | |
3397b77e ER |
109 | submounts=$(get_dev_mounts) |
110 | ||
111 | if [ "$submounts" ]; then | |
112 | # mount to temporary location to be able to move submounts | |
113 | # this needs writable TMPDIR:-/tmp, so it won't work in early boot | |
114 | # but fix is simple: use initramfs instead of romfs | |
115 | devdir=$(mktemp -d ${TMPDIR:-/tmp}/tmpXXXXXX) | |
116 | else | |
117 | devdir=$udev_root | |
118 | fi | |
bdd7aa53 ER |
119 | mount -n -o mode=0755 -t devtmpfs devtmpfs "$devdir" |
120 | ret=$(( $ret + $? )) | |
7e0b6014 | 121 | |
bdd7aa53 | 122 | # relocate submounts |
3397b77e | 123 | for dir in $submounts; do |
bdd7aa53 ER |
124 | mount -n --move $udev_root/$dir $devdir/$dir |
125 | ret=$(( $ret + $? )) | |
126 | done | |
0d219f5b | 127 | |
3397b77e ER |
128 | if [ "$submounts" ]; then |
129 | mount -n --move $devdir $udev_root | |
130 | rmdir $devdir | |
131 | fi | |
6ba94d68 | 132 | } |
120a2def | 133 | |
120a2def | 134 | kill_udevd > "$udev_root/null" 2>&1 |
ec7c0939 | 135 | |
8495ab1b JR |
136 | # Create required static device nodes for the current kernel |
137 | create_static_nodes | |
138 | ||
7e0b6014 | 139 | # Start udevd daemon |
f7cd1a07 ER |
140 | $udevd --daemon; rc=$? |
141 | test $rc -eq 0 && ok || fail | |
142 | ret=$(( $ret + $rc )) | |
7e0b6014 ER |
143 | |
144 | # Making extra nodes | |
f7cd1a07 ER |
145 | show "Setup extra nodes"; busy |
146 | make_extra_nodes; rc=$? | |
147 | test $rc -eq 0 && ok || fail | |
148 | ret=$(( $ret + $rc )) | |
855c97b3 | 149 | |
8135e00e | 150 | if [ -f /sys/class/tty/console/uevent ]; then |
7e0b6014 | 151 | # Setting default hotplug handler |
855c97b3 | 152 | set_hotplug_handler |
153 | ret=$(( $ret + $? )) | |
154 | ||
d95b8af3 | 155 | # retrigger all events |
8135e00e | 156 | show "Retrigger subsystems events"; busy |
f7cd1a07 ER |
157 | /sbin/udevadm trigger --type=subsystems --action=add; rc=$? |
158 | test $rc -eq 0 && ok || fail | |
159 | ret=$(( $ret + $rc )) | |
160 | ||
8135e00e | 161 | show "Retrigger devices events"; busy |
f7cd1a07 ER |
162 | /sbin/udevadm trigger --type=devices --action=add; rc=$? |
163 | test $rc -eq 0 && ok || fail | |
164 | ret=$(( $ret + $rc )) | |
7e0b6014 | 165 | |
d95b8af3 | 166 | # wait for the events to finish |
f7cd1a07 ER |
167 | show "udevadm settle"; busy |
168 | /sbin/udevadm settle; rc=$? | |
169 | test $rc -eq 0 && ok || fail | |
170 | ret=$(( $ret + $rc )) | |
de6b464e | 171 | else |
855c97b3 | 172 | echo "Kernel too old for this udev version" |
de6b464e | 173 | fi |
d95b8af3 | 174 | |
f7cd1a07 | 175 | exit $ret |