recipes/udev/udev-154/init

   1 #!/bin/sh -e
   2
   3 ### BEGIN INIT INFO
   4 # Provides:          udev
   5 # Required-Start:    mountvirtfs
   6 # Required-Stop:
   7 # Default-Start:     S
   8 # Default-Stop:
   9 # Short-Description: Start udevd, populate /dev and load drivers.
  10 ### END INIT INFO
  11
  12 export TZ=/etc/localtime
  13
  14 [ -d /sys/class ] || exit 1
  15 [ -r /proc/mounts ] || exit 1
  16 [ -x /sbin/udevd ] || exit 1
  17 [ -f /etc/default/udev ] && . /etc/default/udev
  18 [ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
  19
  20 kill_udevd() {
  21         if [ -x /sbin/pidof ]; then
  22                 pid=`/sbin/pidof -x udevd`
  23                 [ -n "$pid" ] && kill $pid
  24         fi
  25 }
  26
  27 export ACTION=add
  28 # propagate /dev from /sys
  29 echo "Starting udev"
  30
  31 # mount the tmpfs on /dev, if not already done
  32 LANG=C awk "\$2 == \"/dev\" && \$4 == \"tmpfs\" { exit 1 }" /proc/mounts && {
  33         mount -n -o mode=0755 -t tmpfs none "/dev"
  34         mkdir -m 0755 /dev/pts
  35         mkdir -m 1777 /dev/shm
  36 }
  37
  38 if [ "$DEVCACHE" != "" ]; then
  39         # Invalidate udev cache if the kernel or its bootargs/cmdline have changed
  40         [ -x /bin/uname ] && /bin/uname -mrspv > /tmp/uname || touch /tmp/uname
  41         [ -r /proc/cmdline ] && cat /proc/cmdline > /tmp/cmdline || touch /tmp/cmdline
  42         [ -r /proc/atags ] && cat /proc/atags > /tmp/atags || touch /tmp/atags
  43         if [ -e $DEVCACHE ] && \
  44            cmp -s /tmp/uname /etc/udev/saved.uname && \
  45            cmp -s /tmp/cmdline /etc/udev/saved.cmdline && \
  46            cmp -s /tmp/atags /etc/udev/saved.atags; then
  47                 (cd /; tar xf $DEVCACHE > /dev/null 2>&1)
  48                 not_first_boot=1
  49         fi
  50 fi
  51
  52 if [ ! -e "/lib/modules/$(uname -r)"/modules.dep ] ; then
  53         mkdir -p /lib/modules/$(uname -r)
  54         depmod -ae
  55 fi
  56
  57 # make_extra_nodes
  58 kill_udevd > "/dev/null" 2>&1
  59
  60         # trigger the sorted events
  61         echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
  62         /sbin/udevd -d
  63
  64         /sbin/udevadm control --env STARTUP=1
  65                 if [ "$not_first_boot" != "" ];then
  66                         /sbin/udevadm trigger --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus  --subsystem-nomatch=graphics  --subsystem-nomatch=backlight --subsystem-nomatch=video4linux  --subsystem-nomatch=platform
  67                         (/sbin/udevadm settle --timeout=3; /sbin/udevadm control --env STARTUP=)&
  68                         if [ "$DEVCACHE" != "" ]; then
  69                                 rm -f /tmp/uname
  70                                 rm -f /tmp/cmdline
  71                                 rm -f /tmp/atags
  72                         fi
  73                 else
  74                         /sbin/udevadm trigger
  75                         /sbin/udevadm settle
  76                 fi
  77
  78 exit 0