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

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    Revision 848 - (hide annotations) (download)
    Mon May 4 19:54:19 2009 UTC (15 years ago) by niro
    File size: 3979 byte(s) 
    start udevd via start-stop-daemon
    1 niro 782 #!/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 niro 847 /sbin/udevadm trigger
    37 niro 782 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 niro 847 /sbin/udevadm trigger --attr-match=dev
    43 niro 782
    44     # run persistent-net stuff
    45 niro 847 /sbin/udevadm trigger --subsystem-match=net
    46 niro 782 fi
    47     evaluate_retval
    48    
    49     # loop until everything is finished
    50     echo -e ${COLOREDSTAR}" Letting udev process events ..."
    51 niro 847 /sbin/udevadm settle --timeout=60
    52 niro 782 evaluate_retval
    53    
    54     # unset this variable
    55 niro 847 /sbin/udevadm control --env do_not_run_plug_service=
    56 niro 782
    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 niro 848 start-stop-daemon --start --exec /sbin/udevd -- --daemon </dev/console >/dev/console 2>/dev/console
    131 niro 782 else
    132 niro 848 start-stop-daemon --start --exec /sbin/udevd -- --daemon
    133 niro 782 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     }