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    Contents of /tags/udev-081-r4/config-udev-081-r4/udev.rc

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    Revision 1211 - (show annotations) (download)
    Thu Dec 2 13:03:42 2010 UTC (13 years, 5 months ago) by niro
    File size: 4114 byte(s) 
    tagged udev-081-r4
    1 # starts udev
    2 # $Header$
    3
    4 seed_dev()
    5 {
    6 echo -e ${COLOREDSTAR}" Seeding /dev with needed nodes ..."
    7
    8 # not provided by sysfs but needed
    9 ln -snf /proc/self/fd /dev/fd
    10 ln -snf fd/0 /dev/stdin
    11 ln -snf fd/1 /dev/stdout
    12 ln -snf fd/2 /dev/stderr
    13 ln -snf /proc/kcore /dev/core
    14 ln -snf /proc/asound/oss/sndstat /dev/sndstat
    15
    16 # create problematic directories
    17 mkdir -p /dev/{pts,shm}
    18
    19 return 0
    20 }
    21
    22 # some needed functions functions
    23 populate_udev()
    24 {
    25 # trigger via uevents on newer kernels (>= 2.6.15)
    26 if [ "$(kernel_version | sed 's:\.::g')" -gt "2614" ]
    27 then
    28 echo -e ${COLOREDSTAR}" Populating /dev with existing devices through uevents ..."
    29 trigger_uevents
    30 evaluate_retval
    31 else
    32 echo -e ${COLOREDSTAR}" Populating /dev with existing devices via udevstart ..."
    33 /sbin/udevstart
    34 evaluate_retval
    35 fi
    36
    37 # loop until everything is finished
    38 # there's gotta be a better way...
    39 echo -e ${COLOREDSTAR}" Letting udev process events ..."
    40 local loop=0
    41 while test -d /dev/.udev/queue
    42 do
    43 sleep 0.1;
    44 test "${loop}" -gt 300 && break
    45 loop=$((${loop} + 1))
    46 done
    47 evaluate_retval
    48
    49 return 0
    50 }
    51
    52 # This works for 2.6.15 kernels or greater
    53 trigger_uevents()
    54 {
    55 local list=""
    56 local i
    57 local first
    58 local last
    59 local default
    60
    61 # if you want real coldplug (with all modules being loaded for all
    62 # devices in the system), uncomment out the next line.
    63 #list="${lis}t $(echo /sys/bus/*/devices/*/uevent)"
    64 list="${list} $(echo /sys/class/*/*/uevent)"
    65 list="${list} $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
    66 for i in ${list}
    67 do
    68 case "${i}" in
    69 */device/uevent)
    70 # skip followed device symlinks
    71 continue
    72 ;;
    73 */class/mem/*|*/class/tty/*)
    74 first="${first} ${i}"
    75 ;;
    76 */block/md*)
    77 last="${last} ${i}"
    78 ;;
    79 */*)
    80 default="${default} ${i}"
    81 ;;
    82 esac
    83 done
    84
    85 # trigger the sorted events
    86 for i in ${first} ${default} ${last}
    87 do
    88 echo "add" > "${i}"
    89 done
    90 }
    91
    92 start_udev()
    93 {
    94
    95 # create a ramdisk for populating udev
    96 echo -e ${COLOREDSTAR}"Mounting udev at /dev ..."
    97 # many video drivers needed exec access
    98 fstype=ramfs
    99 # tmpfs was suggested by Greg Kroah-Hartman
    100 kernel_supports_fs tmpfs && fstype=tmpfs
    101 # mount devtmpfs if supported
    102 kernel_supports_fs devtmpfs && fstype=devtmpfs
    103 mount -n -t ${fstype} udev /dev -o exec,nosuid,mode=0755,size=10M
    104 evaluate_retval
    105
    106 # if a device tarball exists load it and if it is activated
    107 echo -e ${COLOREDSTAR}"Configurating system to use udev ..."
    108 if [[ ${RC_DEVICE_TARBALL} = yes ]]
    109 then
    110 echo -e ${COLOREDSTAR}" Populating /dev with with device nodes ..."
    111 tar -jxpf /lib/udev-state/devices.tar.bz2 -C /dev
    112 evaluate_retval
    113 fi
    114
    115 seed_dev
    116
    117 # use netlink to manage udev with newer kernels
    118 if [ "$(kernel_version | sed 's:\.::g')" -gt "2614" ]
    119 then
    120 echo -e ${COLOREDSTAR}" Using netlink for hotplug events ..."
    121 echo "" > /proc/sys/kernel/hotplug
    122
    123 elif [ -e /proc/sys/kernel/hotplug ]
    124 then
    125 echo -e ${COLOREDSTAR}" Setting /sbin/udev as hotplug agent ..."
    126 echo "/sbin/udev" > /proc/sys/kernel/hotplug
    127 else
    128 echo -e ${COLOREDSTAR}${COLYELLOW}" Kernel was not compiled with hotplug support !"
    129 fi
    130 evaluate_retval
    131
    132 # start udev daemon
    133 echo -e ${COLOREDSTAR}" Starting udevd daemon ..."
    134 start-stop-daemon --start --exec /sbin/udevd -- --daemon
    135 evaluate_retval
    136
    137 # now load udev
    138 populate_udev
    139 }
    140
    141 stop_udev()
    142 {
    143 echo -e ${COLOREDSTAR}" Stopping udevd daemon ..."
    144 start-stop-daemon --stop --exec /sbin/udevd
    145 evaluate_retval
    146
    147 # if requested save devices to a device tarball before halt
    148 # only for kernels >=2.6 *and* udev
    149 # make sure that udev is mounted but *not* devfs --> /dev/.devfsd
    150 if [[ ${RC_DEVICE_TARBALL} = yes ]] && \
    151 [ -e /dev/.udev -a ! -e /dev/.devfsd -a ! -e /.bootdev ]
    152 then
    153 echo -e ${COLOREDSTAR}"Saving /dev device nodes ..."
    154 ( cd /dev; tar -jclpf "/tmp/devices-$$.tar.bz2" * &> /dev/null )
    155 mv -f "/tmp/devices-$$.tar.bz2" /lib/udev-state/devices.tar.bz2
    156 evaluate_retval
    157 fi
    158 }
    159
    160 start_devicemanager()
    161 {
    162 start_udev
    163 }
    164
    165 stop_devicemanager()
    166 {
    167 stop_udev
    168 }

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