target/early/initramfs/init.sh

   1 #!/bin/sh
   2 # --- SDE-COPYRIGHT-NOTE-BEGIN ---
   3 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   4 #
   5 # Filename: target/early/initramfs/init.sh
   6 # Copyright (C) 2007 - 2008 The OpenSDE Project
   7 #
   8 # More information can be found in the files COPYING and README.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; version 2 of the License. A copy of the
  13 # GNU General Public License can be found in the file COPYING.
  14 # --- SDE-COPYRIGHT-NOTE-END ---
  15
  16 export PATH=/usr/bin:/usr/sbin:/bin:/sbin
  17
  18 modules=
  19 root=
  20 mode=
  21 init=/sbin/init
  22
  23 NOCOLOR=
  24 initargs="$*"
  25
  26 want_mdadm=
  27 want_lvm=
  28 want_shell=
  29
  30 # read kernel arguments
  31 [ -e /proc/cmdline ] || mount -n -t proc  none /proc
  32 set -- $( cat /proc/cmdline )
  33 for x; do
  34         v="${x#*=}"
  35         case "$x" in
  36                 root=*)         root="$v"       ;;
  37                 init=*)         init="$v"       ;;
  38                 rw|ro)          mode="$x"       ;;
  39                 modules=*)      modules=$( echo "$v" | tr ',' ' ' )     ;;
  40                 nocolor)        export NOCOLOR=yes      ;;
  41                 initrdopt=*)    for y in $( echo "$v" | tr ',' ' ' ); do
  42                                 case "$y" in
  43                                         mdadm)          want_mdadm=yes ;;
  44                                         mdadm=*)        want_mdadm="${y#mdadm=}" ;;
  45                                         lvm)            want_lvm=yes ;;
  46                                         lvm=*)          want_lvm="${y#lvm=}" ;;
  47                                         shell)          want_shell=yes ;;
  48                                         shell=*)        want_shell="${y#shell=}" ;;
  49                                 esac
  50                                 done
  51                                 ;;
  52         esac
  53 done
  54
  55 . /etc/rc.d/functions.in
  56
  57 banner "Starting Early User Space environment"
  58
  59 title "Mounting /proc and /sys"
  60 check mount -n -t usbfs none /proc/bus/usb
  61 check mount -n -t sysfs none /sys
  62 status
  63
  64 [ -x /bin/dmesg ] && /bin/dmesg -n 3
  65
  66 title "Preparing /dev"
  67 check mount -n -t tmpfs none /dev
  68 check cp -a /lib/udev/devices/* /dev
  69 status
  70
  71 title "Starting udev daemon"
  72 echo "" > /sys/kernel/uevent_helper
  73 check udevd --daemon
  74 status
  75
  76 if [ -x /sbin/modprobe -a -n "$modules" ]; then
  77         title "Preloading requested kernel modules"
  78         for x in $modules; do
  79                 echo -n " $x"
  80                 check modprobe -q $x
  81         done
  82         status
  83 fi
  84
  85 title "Triggering coldplug"
  86 check udevtrigger
  87 check udevsettle
  88 status
  89
  90 sleep 2
  91
  92 [ -n "$root" ] || echo "No root device defined."
  93
  94 if [ ! -e "$root" ]; then
  95         if [ "$want_mdadm" = yes ]; then
  96                 title "Detecting possible RAID devices"
  97                 check mdadm -E --scan > /etc/mdadm.conf
  98                 status
  99         fi
 100
 101         if [ "$want_mdadm" != no -a -s /etc/mdadm.conf ]; then
 102                 # try activating software raids
 103                 title "Activating RAID devices"
 104                 modprobe -q md-mod
 105                 udevsettle
 106                 check mdadm -As --auto=yes
 107                 status
 108         fi
 109 fi
 110
 111 if [ ! -e "$root" ]; then
 112         if [ "$want_lvm" = yes ]; then
 113                 title "Detecting possible LVM devices"
 114                 check lvm vgscan
 115                 status
 116         fi
 117
 118         if [ "$want_lvm" != no -a -d /etc/lvm/archive ]; then
 119                 title "Activating LVM devices"
 120                 modprobe -q dm_mod
 121                 udevsettle
 122                 check lvm vgchange -ay
 123                 status
 124         fi
 125 fi
 126
 127 if [ -n "$root" ]; then
 128         udevsettle
 129
 130         # give it a second chance to appear (delay 2s)
 131         [ -e "$root" ] || sleep 2;
 132
 133         if [ -e "$root" ]; then
 134                 /lib/udev/vol_id "$root" > /tmp/$$.vol_id
 135                 . /tmp/$$.vol_id
 136                 rm /tmp/$$.vol_id
 137
 138                 title "Mounting $root (${ID_FS_TYPE:-unknown}) "
 139                 check mount ${ID_FS_TYPE:+-t $ID_FS_TYPE} ${mode:+-o $mode} "$root" /rootfs
 140                 status
 141         else
 142                 echo "root device ($root) not found on time."
 143         fi
 144 fi
 145
 146 # wait for /sbin/init
 147 while [ ! -x "/rootfs$init" ]; do
 148         # one shell is enough
 149         want_shell=no
 150         echo -e "\nPlease mount root device on /rootfs and exit to continue."
 151         /sbin/getsh
 152 done
 153
 154 if [ "$want_shell" = yes ]; then
 155         echo -e "\nA last-minute shell was requested, please exit to continue."
 156         /sbin/getsh
 157 fi
 158
 159 title "Cleaning up"
 160 check killall udevd
 161 check mount -t none -o move /dev /rootfs/dev
 162 check mount -t none -o move /sys /rootfs/sys
 163 check mount -t none -o move /proc /rootfs/proc
 164 status
 165
 166 exec switch_root /rootfs "$init" $initargs
 167 #FIXME: what if it fails?