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
12export TZ=/etc/localtime
13
14[ -d /sys/class ] || exit 1
15[ -r /proc/mounts ] || exit 1
16[ -x @UDEVD@ ] || exit 1
17
18[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
19[ -f /etc/default/rcS ] && . /etc/default/rcS
20
21kill_udevd () {
22    pid=`pidof -x udevd`
23    [ -n "$pid" ] && kill $pid
24}
25
26make_static_nodes () {
27    [ -e /lib/modules/$(uname -r)/modules.devname ] || return 0
28    [ -x @KMOD@ ] || return 0
29
30    #output to /proc/self/fd/1 since /dev/stdout not created by udevd yet
31    @KMOD@ static-nodes --format=tmpfiles --output=/proc/self/fd/1 |
32    while read TTYPE TPATH TMODE TUSER TGROUP TAGE TARG; do
33    case "${TTYPE}" in
34    'd')
35            test -d "${TPATH}" || mkdir -p -m "${TMODE}" "${TPATH}"
36            ;;
37
38    'c!')
39            if [ ! -c "${TPATH}" ]; then
40                    old_ifs="${IFS}"
41                    IFS=:
42                    set -- ${TARG}
43                    IFS="${old_ifs}"
44                    mknod -m "${TMODE}" "${TPATH}" c "$@"
45            fi
46            ;;
47
48    *)
49            echo "Unparseable line (${TTYPE} ${TPATH} ${TMODE} ${TUSER} ${TGROUP} ${TAGE} ${TARG})"
50            return 1
51            ;;
52    esac
53    if [ "${TUSER}" != "-" ]; then
54            chown "${TUSER}" "${TPATH}"
55    fi
56    if [ "${TGROUP}" != "-" ]; then
57            chgrp "${TGROUP}" "${TPATH}"
58    fi
59    done
60}
61
62case "$1" in
63  start)
64    export ACTION=add
65    # propagate /dev from /sys
66    echo "Starting udev"
67
68    # Check for requireed devtmpfs before trying to start udev and
69    # mount a no-existant fs.
70    if ! grep -q devtmpfs /proc/filesystems
71    then
72        echo "Missing devtmpfs, which is required for udev to run";
73        echo "Halting..."
74        halt
75    fi
76    # mount the devtmpfs on /dev, if not already done
77    LANG=C awk '$2 == "/dev" && ($3 == "devtmpfs") { exit 1 }' /proc/mounts && {
78            mount -n -o mode=0755 -t devtmpfs none "/dev"
79    }
80    [ -e /dev/pts ] || mkdir -m 0755 /dev/pts
81    [ -e /dev/shm ] || mkdir -m 1777 /dev/shm
82    # the automount rule for udev needs /tmp directory available, as /tmp is a symlink
83    # to /var/tmp which in turn is a symlink to /var/volatile/tmp, we need to make sure
84    # /var/volatile/tmp directory to be available.
85    mkdir -m 1777 -p /var/volatile/tmp
86
87    # make_extra_nodes
88    kill_udevd > "/dev/null" 2>&1
89
90    make_static_nodes
91    # trigger the sorted events
92    [ -e /proc/sys/kernel/hotplug ] && printf '\0\n' >/proc/sys/kernel/hotplug
93    @UDEVD@ -d
94
95    udevadm control --env=STARTUP=1
96    if [ "$not_first_boot" != "" ];then
97            if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then
98                PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform"
99            else
100                PLATFORM_BUS_NOMATCH=""
101            fi
102            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
103            (udevadm settle --timeout=3; udevadm control --env=STARTUP=)&
104    else
105            udevadm trigger --action=add
106            udevadm settle
107    fi
108    ;;
109  stop)
110    echo "Stopping udevd"
111    start-stop-daemon --stop --name udevd --quiet
112    ;;
113  restart)
114    $0 stop
115    sleep 1
116    $0 start
117    ;;
118  status)
119    pid=`pidof -x udevd`
120    if [ -n "$pid" ]; then
121	echo "udevd (pid $pid) is running ..."
122    else
123	echo "udevd is stopped"
124    fi
125    ;;
126  *)
127    echo "Usage: $0 {start|stop|status|restart}"
128    exit 1
129esac
130exit 0
131