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 sysfs_dir=/sys
  34 bin=/sbin/udev
  35 udevd=/sbin/udevd
  36 MAKEDEV="/sbin/MAKEDEV"
  37
  38 make_extra_nodes () {
  39         ln -snf /proc/self/fd $udev_root/fd
  40         ln -snf /proc/self/fd/0 $udev_root/stdin
  41         ln -snf /proc/self/fd/1 $udev_root/stdout
  42         ln -snf /proc/self/fd/2 $udev_root/stderr
  43         ln -snf /proc/kcore $udev_root/core
  44
  45         [ -d $udev_root/pts ] || (mkdir $udev_root/pts;chmod 0755 $udev_root/pts)
  46         [ -d $udev_root/shm ] || (mkdir $udev_root/shm;chmod 0755 $udev_root/shm)
  47
  48         if [ -x $MAKEDEV ]; then
  49                 $MAKEDEV -x $(
  50                         for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
  51                             echo cpu/$i/microcode;
  52                         done;
  53                         for i in 1 2 3 4 5 6; do echo tty$i;done;
  54                         for i in 0 1 2 3 4 5 6 7; do echo loop$i; done;
  55                         for i in 0 1 2 3; do echo lp$i; echo par$i;done;
  56                         echo net/tun ppp console null zero;
  57                 );
  58                 [ -a /dev/MAKEDEV ] || ln -s $MAKEDEV /dev/MAKEDEV;
  59                 cp -a /etc/udev/devices/* /dev/ >/dev/null 2>&1 || :
  60         fi
  61 }
  62
  63 # we cannot use /usr/bin/find here
  64 find_d () {
  65         where=$1
  66         what=$2
  67         found=""
  68         for f in $where/*; do
  69                 if [ -d "$f" -a ! -L "$f" ]; then
  70                         if [ "$f" != "${f%%$what}" ];then
  71                                 # make sure we are at the path end
  72                                 # we have no dirname and basename
  73                                 rest="${f#*$what}"
  74                                 [ "${rest##*/}" = "$rest" ] && found="$found $f"
  75                         fi
  76                         found="$found $(find_d $f $what)"
  77                 fi
  78         done
  79         echo "$found"
  80 }
  81
  82 # we cannot use /usr/bin/find here
  83 find_f () {
  84         where=$1
  85         what=$2
  86         found=""
  87         for f in $where/*; do
  88                 if [ -d "$f" -a ! -L "$f" ]; then
  89                         found="$found $(find_f $f $what)"
  90                 elif [ -e "$f" ]; then
  91                         [ "$f" != "${f%$what}" ] && found="$found $f"
  92                 fi
  93         done
  94         echo "$found"
  95 }
  96
  97 # call hotplug with the scsi devices
  98 scsi_replay () {
  99         HOTPLUG=$(cat /proc/sys/kernel/hotplug)
 100         [ -z "$HOTPLUG" ] && return 1
 101
 102         scsi_hosts=$(find_d /sys/devices host\*)
 103         SEQNUM=1
 104
 105         for host in $scsi_hosts; do
 106                 [ -d $host ] || continue
 107                 devs=$(find_f $host type)
 108                 for dev in $devs;do
 109                         [ -f $dev ] || continue
 110                         export SEQNUM
 111                         DEVPATH=${dev%/type}
 112                         DEVPATH=${DEVPATH#/sys}
 113                         export DEVPATH
 114                         export ACTION=add
 115                         $HOTPLUG scsi_device
 116                         SEQNUM=$(($SEQNUM + 1))
 117                         $HOTPLUG scsi
 118                         SEQNUM=$(($SEQNUM + 1))
 119                 done
 120         done
 121         return 0
 122 }
 123
 124 export ACTION=add
 125 export UDEV_NO_SLEEP=1
 126 prog=udev
 127 ret=0
 128 nls "Starting udev"
 129 # propagate $udev_root from /sys
 130 grep -q "none ${udev_root%/} " /proc/mounts || {
 131         mount -n -o mode=0755 -t tmpfs none "$udev_root"
 132         ret=$(($ret + $?))
 133 }
 134 make_extra_nodes
 135 scsi_replay >/dev/null 2>&1
 136 ret=$(($ret + $?))
 137 rm -f $udev_root/.udev.tdb
 138 /sbin/udevstart
 139 ret=$(($ret + $?))
 140 [ $ret -eq 0 ] && ok || fail
 141 exit 0