etc/init.d/udev

   1 #! /bin/sh
   2 #
   3 # udev  init script to setup /udev
   4 #
   5 # chkconfig: 2345 20 80
   6 # description: manage user-space device nodes in /udev
   7
   8 . /etc/rc.d/init.d/functions
   9
  10 . /etc/udev/udev.conf
  11
  12 prog=udev
  13 sysfs_dir=/sys
  14 bin=/sbin/udev
  15 udevd=/sbin/udevd
  16 udev_root=/udev
  17
  18 run_udev () {
  19         # handle block devices and their partitions
  20         for i in ${sysfs_dir}/block/*; do
  21                 # add each drive
  22                 export DEVPATH=${i#${sysfs_dir}}
  23                 $bin block &
  24
  25                 # add each partition, on each device
  26                 for j in $i/*; do
  27                         if [ -f $j/dev ]; then
  28                                 export DEVPATH=${j#${sysfs_dir}}
  29                                 $bin block &
  30                         fi
  31                 done
  32         done
  33         # all other device classes
  34         for i in ${sysfs_dir}/class/*; do
  35                 for j in $i/*; do
  36                         if [ -f $j/dev ]; then
  37                                 export DEVPATH=${j#${sysfs_dir}}
  38                                 CLASS=`echo ${i#${sysfs_dir}} | \
  39                                         cut --delimiter='/' --fields=3-`
  40                                 $bin $CLASS &
  41                         fi
  42                 done
  43         done
  44         return 0
  45 }
  46
  47 make_extra_nodes () {
  48         # there are a few things that sysfs does not export for us.
  49         # these things go here (and remember to remove them in
  50         # remove_extra_nodes()
  51         #
  52         # Thanks to Gentoo for the initial list of these.
  53         ln -snf /proc/self/fd $udev_root/fd
  54         ln -snf /proc/self/fd/0 $udev_root/stdin
  55         ln -snf /proc/self/fd/1 $udev_root/stdout
  56         ln -snf /proc/self/fd/2 $udev_root/stderr
  57         ln -snf /proc/kcore $udev_root/core
  58         #ln -snf /proc/asound/oss/sndstat $udev_root/sndstat
  59 }
  60
  61 remove_extra_nodes () {
  62         # get rid of the extra nodes created in make_extra_nodes()
  63         rm $udev_root/fd
  64         rm $udev_root/stdin
  65         rm $udev_root/stdout
  66         rm $udev_root/stderr
  67         rm $udev_root/core
  68         #rm $udev_root/sndstat
  69 }
  70
  71 case "$1" in
  72   start)
  73         # don't use udev if sysfs is not mounted.
  74         if [ ! -d $sysfs_dir/block ]; then
  75                 exit 1
  76         fi
  77         if [ ! -d $udev_root ]; then
  78                 mkdir $udev_root
  79         fi
  80
  81         # remove the database if it is there as we always want to start fresh
  82         if [ -f $udev_root/.udevdb ]; then
  83                 rm -rf $udev_root/.udevdb
  84         fi
  85
  86         # propogate /udev from /sys - we only need this while we do not
  87         # have initramfs and an early user-space with which to do early
  88         # device bring up
  89         export ACTION=add
  90         echo -n $"Creating initial udev device nodes:"
  91         run_udev
  92         make_extra_nodes
  93
  94         # We want to start udevd ourselves if it isn't already running.  This
  95         # lets udevd run at a sane nice level...
  96         $udevd &
  97
  98         success /bin/true
  99         echo
 100         touch /var/lock/subsys/udev
 101         ;;
 102   stop)
 103         # be careful
 104         echo -n $"Removing udev device nodes: "
 105         export ACTION=remove
 106         run_udev
 107         remove_extra_nodes
 108         success /bin/true
 109         echo
 110         rm -f /var/lock/subsys/udev
 111         ;;
 112   status)
 113         if [ -f /var/lock/subsys/udev ]; then
 114                 echo $"$prog has run"
 115                 exit 0
 116         fi
 117         echo $"$prog is stopped"
 118         exit 3
 119         ;;
 120   restart)
 121         $0 stop
 122         $0 start
 123         ;;
 124   reload)
 125         # nothing to do here
 126         ;;
 127   *)
 128         echo "Usage: $0 {start|stop|status|restart}"
 129         exit 1
 130 esac
 131
 132 exit 0