start_udev

   1 #!/bin/sh
   2 #
   3 # start_udev
   4 #
   5 # script to initialize /dev by using udev.
   6 #
   7 # Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
   8 #
   9 # Released under the GPL v2 only.
  10 #
  11 # This needs to be run at the earliest possible point in the boot
  12 # process.
  13 #
  14 # Based on the udev init.d script
  15 #
  16 # Thanks go out to the Gentoo developers for proving
  17 # that this is possible to do.
  18 #
  19 # Yes, it's very verbose, feel free to turn off all of the echo calls,
  20 # they were there to make me feel better that everything was working
  21 # properly during development...
  22 #
  23 # don't use udev if sysfs is not mounted.
  24 [ ! -d $sysfs_dir/class ] || exit 1
  25 [ -r /proc/mounts ] || exit 1
  26 [ -x /sbin/udev ] || exit 1
  27 [ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
  28
  29
  30 . /etc/rc.d/init.d/functions
  31
  32 prog=udev
  33 bin=/sbin/udev
  34 udevd=/sbin/udevd
  35 MAKEDEV="/sbin/MAKEDEV"
  36
  37 make_extra_nodes () {
  38         ln -snf /proc/self/fd $udev_root/fd
  39         ln -snf /proc/self/fd/0 $udev_root/stdin
  40         ln -snf /proc/self/fd/1 $udev_root/stdout
  41         ln -snf /proc/self/fd/2 $udev_root/stderr
  42         ln -snf /proc/kcore $udev_root/core
  43
  44         [ -d $udev_root/pts ] || (mkdir $udev_root/pts;chmod 0755 $udev_root/pts)
  45         [ -d $udev_root/shm ] || (mkdir $udev_root/shm;chmod 0755 $udev_root/shm)
  46
  47         if [ -x $MAKEDEV ]; then
  48                 $MAKEDEV -x $(
  49                         for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
  50                             echo cpu/$i/microcode;
  51                         done;
  52                         for i in 1 2 3 4 5 6; do echo tty$i;done;
  53                         for i in 0 1 2 3 4 5 6 7; do echo loop$i; done;
  54                         for i in 0 1 2 3; do echo lp$i; echo parport$i;done;
  55                         echo net/tun ppp console null zero;
  56                 );
  57                 [ -a /dev/MAKEDEV ] || ln -s $MAKEDEV /dev/MAKEDEV;
  58                 cp -a /etc/udev/devices/* /dev/ >/dev/null 2>&1 || :
  59         fi
  60 }
  61
  62 kill_udevd() {
  63         if [ -x /sbin/pidof ]; then
  64                 pid=`/sbin/pidof -x udevd`
  65                 [ -n "$pid" ] && kill $pid
  66         fi
  67 }
  68
  69 # we cannot use /usr/bin/find here
  70 find_d () {
  71         where=$1
  72         what=$2
  73         found=""
  74         for f in $where/*; do
  75                 if [ -d "$f" -a ! -L "$f" ]; then
  76                         if [ "$f" != "${f%%$what}" ];then
  77                                 # make sure we are at the path end
  78                                 # we have no dirname and basename
  79                                 rest="${f#*$what}"
  80                                 [ "${rest##*/}" = "$rest" ] && found="$found $f"
  81                         fi
  82                         found="$found $(find_d $f $what)"
  83                 fi
  84         done
  85         echo "$found"
  86 }
  87
  88 # we cannot use /usr/bin/find here
  89 find_f () {
  90         where=$1
  91         what=$2
  92         found=""
  93         for f in $where/*; do
  94                 if [ -d "$f" -a ! -L "$f" ]; then
  95                         found="$found $(find_f $f $what)"
  96                 elif [ -e "$f" ]; then
  97                         [ "$f" != "${f%$what}" ] && found="$found $f"
  98                 fi
  99         done
 100         echo "$found"
 101 }
 102
 103 # call hotplug with the scsi devices
 104 scsi_replay () {
 105         HOTPLUG=$(cat /proc/sys/kernel/hotplug)
 106         [ -z "$HOTPLUG" ] && return 1
 107
 108         scsi_hosts=$(find_d /sys/devices host\*)
 109         SEQNUM=1
 110
 111         for host in $scsi_hosts; do
 112                 [ -d $host ] || continue
 113                 devs=$(find_f $host type)
 114                 for dev in $devs;do
 115                         [ -f $dev ] || continue
 116                         export SEQNUM
 117                         DEVPATH=${dev%/type}
 118                         DEVPATH=${DEVPATH#/sys}
 119                         export DEVPATH
 120                         export ACTION=add
 121                         $HOTPLUG scsi_device
 122                         SEQNUM=$(($SEQNUM + 1))
 123                         $HOTPLUG scsi
 124                         SEQNUM=$(($SEQNUM + 1))
 125                 done
 126         done
 127         return 0
 128 }
 129
 130 ide_scan() {
 131         if [ ! -d /proc/ide ]; then
 132                 return 1
 133         fi
 134         for i in /proc/ide/*/media; do
 135                 read media < "$i"
 136                 case "$media" in
 137                         disk)
 138                                 module=ide-disk
 139                         ;;
 140                         cdrom)
 141                                 module=ide-cd
 142                         ;;
 143                         tape)
 144                                 module=ide-tape
 145                         ;;
 146                         floppy)
 147                                 module=ide-floppy
 148                         ;;
 149                         *)
 150                                 module=ide-generic
 151                         ;;
 152                 esac
 153                 /sbin/modprobe $module
 154         done
 155         return 0
 156 }
 157
 158 export ACTION=add
 159 export UDEV_NO_SLEEP=1
 160 prog=udev
 161 ret=0
 162 nls "Starting udev"
 163 # propagate $udev_root from /sys
 164 grep -q "none ${udev_root%/} " /proc/mounts || {
 165         mount -n -o mode=0755 -t tmpfs none "$udev_root"
 166         ret=$(($ret + $?))
 167 }
 168 rm -f $udev_root/.udev.tdb
 169 make_extra_nodes
 170 kill_udevd >/dev/null 2>&1
 171 scsi_replay >/dev/null 2>&1
 172 ret=$(($ret + $?))
 173 kill_udevd >/dev/null 2>&1
 174 ide_scan >/dev/null 2>&1
 175 /sbin/udevstart
 176 ret=$(($ret + $?))
 177 [ $ret -eq 0 ] && ok || fail
 178 exit 0