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    Contents of /trunk/magellan-initscripts/etc/rc.d/init.d/udev

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    Revision 848 - (show annotations) (download)
    Mon May 4 19:54:19 2009 UTC (14 years, 11 months ago) by niro
    File size: 3979 byte(s) 
    start udevd via start-stop-daemon
    1 #!/bin/bash
    2 # $Header: /home/cvsd/magellan-cvs/magellan-src/magellan-initscripts/etc/rc.d/init.d/udev,v 1.1 2008-12-22 22:08:32 niro Exp $
    3
    4 udev_version()
    5 {
    6 local version=0
    7
    8 if [[ -x /sbin/udev ]]
    9 then
    10 version=$(/sbin/udev -V)
    11 # We need it without a leading '0', else bash do the wrong thing
    12 version=${version##0}
    13 # Older udev's will print nothing
    14 [[ -z ${version} ]] && version=0
    15 elif [[ -x /sbin/udevd ]]
    16 then
    17 version=$(/sbin/udevd --version)
    18 version=${version##0}
    19 [[ -z ${version} ]] && version=0
    20 fi
    21
    22 echo "${version}"
    23 }
    24
    25 populate_udev()
    26 {
    27 local opts
    28
    29 # tell modprobe.sh to be verbose to $CONSOLE
    30 echo CONSOLE=${CONSOLE} > /dev/.udev_populate
    31
    32 # populate /dev with devices already found by the kernel
    33 echo -e ${COLOREDSTAR}" Populating /dev with existing devices through uevents ..."
    34 if [[ ${RC_COLDPLUG} = yes ]]
    35 then
    36 /sbin/udevadm trigger
    37 else
    38 # do not run any init-scripts
    39 /sbin/udevadm control --env do_not_run_plug_service=1
    40
    41 # only create device nodes
    42 /sbin/udevadm trigger --attr-match=dev
    43
    44 # run persistent-net stuff
    45 /sbin/udevadm trigger --subsystem-match=net
    46 fi
    47 evaluate_retval
    48
    49 # loop until everything is finished
    50 echo -e ${COLOREDSTAR}" Letting udev process events ..."
    51 /sbin/udevadm settle --timeout=60
    52 evaluate_retval
    53
    54 # unset this variable
    55 /sbin/udevadm control --env do_not_run_plug_service=
    56
    57 rm -f /dev/.udev_populate
    58 return 0
    59 }
    60
    61 seed_dev()
    62 {
    63 # seed /dev with some things that we know we need
    64 echo -e ${COLOREDSTAR}" Seeding /dev with needed nodes ..."
    65 (
    66 [ ! -c /dev/console ] && mknod /dev/console c 5 1
    67 [ ! -c /dev/tty1 ] && mknod /dev/tty1 c 4 1
    68 [ ! -c /dev/null ] && mknod /dev/null c 1 3
    69
    70 # copy over any persistant things
    71 if [[ -d /lib/udev/devices ]]
    72 then
    73 cp -RPp /lib/udev/devices/* /dev 2>/dev/null
    74 fi
    75
    76 # not provided by sysfs but needed
    77 ln -snf /proc/self/fd /dev/fd
    78 ln -snf fd/0 /dev/stdin
    79 ln -snf fd/1 /dev/stdout
    80 ln -snf fd/2 /dev/stderr
    81 [[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core
    82
    83 # create problematic directories
    84 mkdir -p /dev/pts /dev/shm
    85 )
    86 evaluate_retval
    87 }
    88
    89 # main function
    90 start_udev()
    91 {
    92 # check if /dev/console exists outside tmpfs
    93 [ -c /dev/console ] ; need_redirect=$?
    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 -n -t ${fstype} udev /dev -o exec,nosuid,mode=0755,size=10M
    102 evaluate_retval
    103
    104 # if a device tarball exists load it and if it is activated
    105 echo -e ${COLOREDSTAR}"Configurating system to use udev ..."
    106 if [[ ${RC_DEVICE_TARBALL} = yes ]]
    107 then
    108 echo -e ${COLOREDSTAR}" Populating /dev with saved device nodes ..."
    109 tar -jxpf /lib/udev/state/devices.tar.bz2 -C /dev
    110 evaluate_retval
    111 fi
    112
    113 # other eeded device nodes with udev
    114 seed_dev
    115
    116 if [ -e /proc/sys/kernel/hotplug ]
    117 then
    118 echo -e ${COLOREDSTAR}" Using netlink for hotplug events ..."
    119 echo "" > /proc/sys/kernel/hotplug
    120 evaluate_retval
    121 else
    122 echo -e ${COLOREDSTAR}${COLYELLOW}" Kernel was not compiled with hotplug support !"
    123 print_status failure
    124 fi
    125
    126 echo -e ${COLOREDSTAR}" Starting udevd daemon ..."
    127 if [ ${need_redirect} -eq 1 ]
    128 then
    129 # we need to open fds 0 1 2
    130 start-stop-daemon --start --exec /sbin/udevd -- --daemon </dev/console >/dev/console 2>/dev/console
    131 else
    132 start-stop-daemon --start --exec /sbin/udevd -- --daemon
    133 fi
    134 evaluate_retval
    135
    136 # write root_link rule
    137 /lib/udev/write_root_link_rule
    138 # populate udev device nodes
    139 populate_udev
    140
    141 # create nodes that udev can't
    142 echo -e ${COLOREDSTAR}" Finializing udev configuration ..."
    143 [[ -x /sbin/dmsetup ]] && /sbin/dmsetup mknodes &>/dev/null
    144 [[ -x /sbin/lvm ]] && /sbin/lvm vgscan -P --mknodes --ignorelockingfailure &>/dev/null
    145 [[ -x /sbin/evms_activate ]] && /sbin/evms_activate -q &>/dev/null
    146 print_status success
    147
    148 # same thing as /dev/.devfsd
    149 touch /dev/.udev
    150 }