etc/init.d/udev.debian

   1 #! /bin/bash
   2 #
   3 # random        init script to setup /udev
   4 #
   5 # chkconfig: 2345 20 80
   6 # description: manage user-space device nodes in /udev
   7 #
   8 # 2003-12-23: - some tweaks to run silently on a debian system
   9 # 2003-12-30: - manage creation (and deletion) of /proc/self/fd->fd and
  10 #               fd/[0,1,2]->std[in,out,err] links
  11 #             - creation and deletion of /proc/kcore->core link
  12 #             - creation and deletion of /proc/asound/oss/sndstat->sndstat link
  13
  14
  15
  16 udev_dir=/udev
  17 sysfs_dir=/sys
  18 bin=/sbin/udev
  19
  20 action () {
  21         if test $2 ; then
  22                 echo $1
  23         else
  24                 echo "Assertion $2 failed"
  25                 echo "Aborting"
  26                 exit 1
  27         fi
  28 }
  29
  30 run_udev () {
  31         # handle block devices and their partitions
  32         for i in ${sysfs_dir}/block/*; do
  33                 # add each drive
  34                 export DEVPATH=${i#${sysfs_dir}}
  35                 $bin block &
  36
  37                 # add each partition, on each device
  38                 for j in $i/*; do
  39                         if [ -f $j/dev ]; then
  40                                 export DEVPATH=${j#${sysfs_dir}}
  41                                 $bin block &
  42                         fi
  43                 done
  44         done
  45         # all other device classes
  46         for i in ${sysfs_dir}/class/*; do
  47                 for j in $i/*; do
  48                         if [ -f $j/dev ]; then
  49                                 export DEVPATH=${j#${sysfs_dir}}
  50                                 CLASS=`echo ${i#${sysfs_dir}} | \
  51                                         cut --delimiter='/' --fields=3-`
  52                                 $bin $CLASS &
  53                         fi
  54                 done
  55         done
  56 }
  57
  58
  59 case "$1" in
  60   start)
  61         if [ ! -d $udev_dir ]; then
  62                 mkdir $udev_dir
  63         fi
  64         # don't use udev if sysfs is not mounted
  65         if [ ! -d $sysfs_dir/block ]; then
  66                 exit 1
  67         fi
  68         # propogate /udev from /sys - we only need this while we do not
  69         # have initramfs and an early user-space with which to do early
  70         # device bring up
  71         action "Creating initial udev device nodes: " /bin/true
  72         export ACTION=add
  73         run_udev
  74
  75         # hack to create stdin node
  76         cd $udev_dir && ln -s /proc/self/fd fd
  77         cd $udev_dir && ln -s fd/0 stdin
  78         cd $udev_dir && ln -s fd/1 stdout
  79         cd $udev_dir && ln -s fd/2 stderr
  80         cd $udev_dir && ln -s /proc/kcore core
  81         cd $udev_dir && ln -s /proc/asound/oss/sndstat sndstat
  82         ;;
  83   stop)
  84         # be careful
  85         action "Removing udev device nodes: " /bin/true
  86         export ACTION=remove
  87         run_udev
  88         rm -f $udev_dir/sndstat
  89         rm -f $udev_dir/core
  90         rm -f $udev_dir/stderr
  91         rm -f $udev_dir/stdout
  92         rm -f $udev_dir/stdin
  93         rm -f $udev_dir/fd
  94         ;;
  95   status)
  96         if [ -d $udev_dir ]; then
  97                 echo "the udev device node directory exists"
  98         else
  99                 echo "the udev device node directory does not exist"
 100         fi
 101         ;;
 102   restart)
 103         $0 stop
 104         $0 start
 105         ;;
 106   reload)
 107         # nothing to do here
 108         ;;
 109   *)
 110         echo "Usage: $0 {start|stop|status|restart}"
 111         exit 1
 112 esac
 113
 114 exit 0