packages/base/udev/init_udev.sh

   1 #!/bin/sh
   2 #
   3 # hdw - linux /etc/init.d/udev
   4 #
   5 # populate /dev directory with device nodes
   6 #
   7
   8 # read udev config
   9 . /etc/udev/udev.conf
  10
  11 prog=udev
  12 sysfs_dir=/sys
  13 bin=/sbin/udev
  14 udevd=/sbin/udevd
  15
  16 # add some nodes not exported by sysfs
  17 run_udev()      {
  18         # block devices & partitions
  19         for i in ${sysfs_dir}/block/*; do
  20                 export DEVPATH=${i#${sysfs_dir}}
  21                 $bin block &
  22                 for j in $i/*; do
  23                         if [ -f $j/dev ]; then
  24                                 export DEVPATH=${j#${sysfs_dir}}
  25                                 $bin block &
  26                         fi
  27                 done
  28         done
  29         # all other devices
  30         for i in ${sysfs_dir}/class/*; do
  31                 for j in $i/*; do
  32                         # cruel hack, to not add/del /dev/null
  33                         if [ "$j" != "${sysfs_dir}/class/mem/null" ] ; then
  34                         if [ -f $j/dev ]; then
  35                                 export DEVPATH=${j#${sysfs_dir}}
  36                                 CLASS=`echo ${i#${sysfs_dir}} | \
  37                                         cut --delimiter='/' --fields=3-`
  38                                 $bin $CLASS &
  39                         fi
  40                         fi
  41                 done
  42         done
  43         return 0
  44                 }
  45
  46 add_nodes()     {
  47         ln -snf /proc/self/fd $udev_root/fd
  48         ln -snf /proc/self/fd/0 $udev_root/stdin
  49         ln -snf /proc/self/fd/1 $udev_root/stdout
  50         ln -snf /proc/self/fd/2 $udev_root/stderr
  51         ln -snf /proc/kcore $udev_root/core
  52 }
  53
  54 # delete them when shutting down (not used right now)
  55 del_nodes()     {
  56         rm -rf $udev_root/{fd,stdin,stdout,stderr,core}
  57 }
  58
  59 # main procedures
  60
  61 case "$1"
  62 in
  63         start)
  64                 echo -n "starting udev ..."
  65                 echo "/sbin/udev" > /proc/sys/kernel/hotplug
  66                 if [ ! -d $sysfs_dir/block ] ; then
  67                         echo "fatal: sysfs not mounted"
  68                         exit 1
  69                 fi
  70                 rm -f $udev_root/.udev.tdb
  71                 mknod -m 0666 ${udev_root}/null c 1 3
  72                 export ACTION=add
  73                 export UDEV_NO_SLEEP=1
  74                 run_udev
  75                 add_nodes
  76                 $udevd &
  77                 echo " done"
  78                 ;;
  79         stop)
  80                 echo -n "stopping udev ..."
  81                 export ACTION=remove
  82                 run_udev
  83                 del_nodes
  84                 rm ${udev_root}/null
  85                 echo " done"
  86                 ;;
  87         restart)
  88                 /etc/init.d/udev stop
  89                 /etc/init.d/udev start
  90                 ;;
  91         status)
  92                 if [ -f /var/lock/subsys/udev ]; then
  93                         echo "udev running ..."
  94                 else
  95                         echo "udev not running ..."
  96                 fi
  97                 ;;
  98         *)
  99                 echo "usage: $0 { start | stop | restart }"
 100                 exit 1
 101                 ;;
 102 esac
 103
 104 exit 0