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 $i/*; do
  32                         # cruel hack to not del /dev/null
  33                         if [ "$j" != "${sysfs_dir}/class/mem/null" -o \
  34                                         "$ACTION" != "remove" ] ; then
  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                         fi
  42                 done
  43         done
  44         return 0
  45                 }
  46
  47 add_nodes()     {
  48         ln -snf /proc/self/fd $udev_root/fd
  49         ln -snf /proc/self/fd/0 $udev_root/stdin
  50         ln -snf /proc/self/fd/1 $udev_root/stdout
  51         ln -snf /proc/self/fd/2 $udev_root/stderr
  52         ln -snf /proc/kcore $udev_root/core
  53 }
  54
  55 # delete them when shutting down (not used right now)
  56 del_nodes()     {
  57         rm -rf $udev_root/{fd,stdin,stdout,stderr,core}
  58 }
  59
  60 # main procedures
  61
  62 case "$1"
  63 in
  64         start)
  65                 echo -n "starting udev ..."
  66                 echo "/sbin/udev" > /proc/sys/kernel/hotplug
  67                 if [ ! -d $sysfs_dir/block ] ; then
  68                         echo "fatal: sysfs not mounted"
  69                         exit 1
  70                 fi
  71                 rm -f $udev_root/.udev.tdb
  72                 [ ! -c ${udev_root}/null ] && \
  73                         mknod -m 0660 ${udev_root}/null c 1 3
  74                 export ACTION=add
  75                 export UDEV_NO_SLEEP=1
  76                 run_udev
  77                 add_nodes
  78                 $udevd &
  79                 echo " done"
  80                 ;;
  81         stop)
  82                 echo -n "stopping udev ..."
  83                 export ACTION=remove
  84                 run_udev
  85                 del_nodes
  86                 echo " done"
  87                 ;;
  88         restart)
  89                 /etc/init.d/udev stop
  90                 /etc/init.d/udev start
  91                 ;;
  92         status)
  93                 if [ -f /var/lock/subsys/udev ]; then
  94                         echo "udev running ..."
  95                 else
  96                         echo "udev not running ..."
  97                 fi
  98                 ;;
  99         *)
 100                 echo "usage: $0 { start | stop | restart }"
 101                 exit 1
 102                 ;;
 103 esac
 104
 105 exit 0