diff options
Diffstat (limited to 'meta/recipes-core/udev/eudev/init')
-rw-r--r-- | meta/recipes-core/udev/eudev/init | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/meta/recipes-core/udev/eudev/init b/meta/recipes-core/udev/eudev/init new file mode 100644 index 0000000000..0ab028b391 --- /dev/null +++ b/meta/recipes-core/udev/eudev/init | |||
@@ -0,0 +1,142 @@ | |||
1 | #!/bin/sh | ||
2 | |||
3 | ### BEGIN INIT INFO | ||
4 | # Provides: udev | ||
5 | # Required-Start: mountvirtfs | ||
6 | # Required-Stop: | ||
7 | # Default-Start: S | ||
8 | # Default-Stop: | ||
9 | # Short-Description: Start udevd, populate /dev and load drivers. | ||
10 | ### END INIT INFO | ||
11 | |||
12 | export TZ=/etc/localtime | ||
13 | |||
14 | [ -d /sys/class ] || exit 1 | ||
15 | [ -r /proc/mounts ] || exit 1 | ||
16 | [ -x @UDEVD@ ] || exit 1 | ||
17 | SYSCONF_CACHED="/etc/udev/cache.data" | ||
18 | SYSCONF_TMP="/dev/shm/udev.cache" | ||
19 | DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen | ||
20 | |||
21 | # A list of files which are used as a criteria to judge whether the udev cache could be reused. | ||
22 | CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices" | ||
23 | [ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags" | ||
24 | |||
25 | # List of files whose metadata (size/mtime/name) will be included in cached | ||
26 | # system state. | ||
27 | META_FILE_LIST="lib/udev/rules.d/* etc/udev/rules.d/*" | ||
28 | |||
29 | # Command to compute system configuration. | ||
30 | sysconf_cmd () { | ||
31 | cat -- $CMP_FILE_LIST | ||
32 | stat -c '%s %Y %n' -- $META_FILE_LIST | awk -F/ '{print $1 " " $NF;}' | ||
33 | } | ||
34 | |||
35 | [ -f /etc/default/udev-cache ] && . /etc/default/udev-cache | ||
36 | [ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf | ||
37 | [ -f /etc/default/rcS ] && . /etc/default/rcS | ||
38 | |||
39 | kill_udevd () { | ||
40 | pid=`pidof -x udevd` | ||
41 | [ -n "$pid" ] && kill $pid | ||
42 | } | ||
43 | |||
44 | case "$1" in | ||
45 | start) | ||
46 | export ACTION=add | ||
47 | # propagate /dev from /sys | ||
48 | echo "Starting udev" | ||
49 | |||
50 | # Check for requireed devtmpfs before trying to start udev and | ||
51 | # mount a no-existant fs. | ||
52 | if ! grep -q devtmpfs /proc/filesystems | ||
53 | then | ||
54 | echo "Missing devtmpfs, which is required for udev to run"; | ||
55 | echo "Halting..." | ||
56 | halt | ||
57 | fi | ||
58 | # mount the devtmpfs on /dev, if not already done | ||
59 | LANG=C awk '$2 == "/dev" && ($3 == "devtmpfs") { exit 1 }' /proc/mounts && { | ||
60 | mount -n -o mode=0755 -t devtmpfs none "/dev" | ||
61 | } | ||
62 | [ -e /dev/pts ] || mkdir -m 0755 /dev/pts | ||
63 | [ -e /dev/shm ] || mkdir -m 1777 /dev/shm | ||
64 | # the automount rule for udev needs /tmp directory available, as /tmp is a symlink | ||
65 | # to /var/tmp which in turn is a symlink to /var/volatile/tmp, we need to make sure | ||
66 | # /var/volatile/tmp directory to be available. | ||
67 | mkdir -m 1777 -p /var/volatile/tmp | ||
68 | |||
69 | # Cache handling. | ||
70 | if [ "$DEVCACHE" != "" ]; then | ||
71 | if [ -e $DEVCACHE ]; then | ||
72 | sysconf_cmd > "$SYSCONF_TMP" | ||
73 | if cmp $SYSCONF_CACHED $SYSCONF_TMP >/dev/null; then | ||
74 | tar xmf $DEVCACHE -C / -m | ||
75 | not_first_boot=1 | ||
76 | [ "$VERBOSE" != "no" ] && echo "udev: using cache file $DEVCACHE" | ||
77 | [ -e $SYSCONF_TMP ] && rm -f "$SYSCONF_TMP" | ||
78 | [ -e "$DEVCACHE_REGEN" ] && rm -f "$DEVCACHE_REGEN" | ||
79 | else | ||
80 | # Output detailed reason why the cached /dev is not used | ||
81 | cat <<EOF | ||
82 | udev: Not using udev cache because of changes detected in the following files: | ||
83 | udev: $CMP_FILE_LIST | ||
84 | udev: $META_FILE_LIST | ||
85 | udev: The udev cache will be regenerated. To identify the detected changes, | ||
86 | udev: compare the cached sysconf at $SYSCONF_CACHED | ||
87 | udev: against the current sysconf at $SYSCONF_TMP | ||
88 | EOF | ||
89 | touch "$DEVCACHE_REGEN" | ||
90 | fi | ||
91 | else | ||
92 | if [ "$ROOTFS_READ_ONLY" != "yes" ]; then | ||
93 | # If rootfs is not read-only, it's possible that a new udev cache would be generated; | ||
94 | # otherwise, we do not bother to read files. | ||
95 | touch "$DEVCACHE_REGEN" | ||
96 | fi | ||
97 | fi | ||
98 | fi | ||
99 | |||
100 | # make_extra_nodes | ||
101 | kill_udevd > "/dev/null" 2>&1 | ||
102 | |||
103 | # trigger the sorted events | ||
104 | [ -e /proc/sys/kernel/hotplug ] && echo -e '\000' >/proc/sys/kernel/hotplug | ||
105 | @UDEVD@ -d | ||
106 | |||
107 | udevadm control --env=STARTUP=1 | ||
108 | if [ "$not_first_boot" != "" ];then | ||
109 | if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then | ||
110 | PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform" | ||
111 | else | ||
112 | PLATFORM_BUS_NOMATCH="" | ||
113 | fi | ||
114 | udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux $PLATFORM_BUS_NOMATCH | ||
115 | (udevadm settle --timeout=3; udevadm control --env=STARTUP=)& | ||
116 | else | ||
117 | udevadm trigger --action=add | ||
118 | udevadm settle | ||
119 | fi | ||
120 | ;; | ||
121 | stop) | ||
122 | echo "Stopping udevd" | ||
123 | start-stop-daemon --stop --name udevd --quiet | ||
124 | ;; | ||
125 | restart) | ||
126 | $0 stop | ||
127 | sleep 1 | ||
128 | $0 start | ||
129 | ;; | ||
130 | status) | ||
131 | pid=`pidof -x udevd` | ||
132 | if [ -n "$pid" ]; then | ||
133 | echo "udevd (pid $pid) is running ..." | ||
134 | else | ||
135 | echo "udevd is stopped" | ||
136 | fi | ||
137 | ;; | ||
138 | *) | ||
139 | echo "Usage: $0 {start|stop|status|restart}" | ||
140 | exit 1 | ||
141 | esac | ||
142 | exit 0 | ||