src/mkinitramfs/mkinitramfs

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2008, 2009  Michael Tremer & Christian Schmidt                #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 . /usr/lib/mkinitramfs/functions
  23
  24 # Add usb support
  25 MODULES="$MODULES ehci-hcd ohci-hcd uhci-hcd"
  26
  27 # Get rootfs and options
  28 rootdev=$(awk '/^[ \t]*[^#]/ { if ($2 == "/") { print $1; }}' /etc/fstab)
  29 rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $3; }}' /etc/fstab)
  30 rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' /etc/fstab)
  31 [ -z "$rootopts" ] && rootopts="defaults"
  32
  33 installmodule --load $rootfs
  34
  35 if [[ "$rootdev" =~ "^(UUID=|LABEL=)" ]]; then
  36         rootdev=$(resolve_device_name "$rootdev")
  37 fi
  38
  39 rootopts=$(echo $rootopts | sed -e 's/^r[ow],//' -e 's/,_netdev//' \
  40         -e 's/_netdev//' -e 's/,r[ow],$//' -e 's/,r[ow],/,/' \
  41         -e 's/^r[ow]$/defaults/' -e 's/$/,ro/')
  42 physdev=$(findblockdevinsys "$rootdev")
  43 physdev=${physdev##*/dev/}
  44 if [ -n "$physdev" ]; then
  45         vecho "[INFO] Found root device $physdev for $rootdev"
  46 else
  47         physdev="$rootdev"
  48 fi
  49
  50 if [ -n "$physdev" -a "$physdev" != "$rootdev" ]; then
  51         findstoragedriver ${physdev##/dev/}
  52 fi
  53
  54 findstoragedriver ${rootdev##/dev/}
  55
  56 cat >> sbin/real-init <<EOF
  57
  58 #rootdev=$rootdev
  59 #rootfstype=$rootfs
  60 #rootopts=$rootopts
  61 EOF
  62
  63 cat >> sbin/real-init <<'EOF'
  64
  65 # Users can override rootfs target on the kernel commandline
  66 for o in $(cat /proc/cmdline); do
  67         case $o in
  68         root=*)
  69                 rootdev=${o#root=}
  70                 ;;
  71         rootflags=*)
  72                 rootflags=${o#rootflags=}
  73                 ;;
  74         rootfstype=*)
  75                 rootfstype=${o#rootfstype=}
  76                 ;;
  77         esac
  78 done
  79
  80 vecho "Starting udevd..."
  81 udevd --daemon
  82
  83 vecho "Creating devices..."
  84 udevadm trigger
  85
  86 vecho "Mounting root filesystem $rootdev..."
  87 [ -n "$rootopts"   ] && rootopts="-o $rootopts"
  88 [ -n "$rootfstype" ] && rootopts="-t $rootfstype $rootopts"
  89 mount $rootdev /sysroot $rootopts
  90
  91 kill $(pidof udevd)
  92
  93 vecho "Switching to new root and running init..."
  94 exec switchroot $(get_verbose) /sysroot
  95
  96 echo exec switchroot failed...
  97 bash
  98 EOF
  99
 100 finalize