etc/init.d/udev

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