xen/09_xen

   1 #! /bin/sh -e
   2
   3 if [ -f /usr/lib/grub/grub-mkconfig_lib ]; then
   4   . /usr/lib/grub/grub-mkconfig_lib
   5 else
   6   # no grub file, so we notify and exit gracefully
   7   echo "Cannot find grub config file, exiting." >&2
   8   exit 0
   9 fi
  10
  11 XEN_HYPERVISOR_CMDLINE=
  12 XEN_LINUX_CMDLINE="console=tty0"
  13 [ -r /etc/xen/grub.conf ] && . /etc/xen/grub.conf
  14
  15 CLASS="--class gnu-linux --class gnu --class os"
  16
  17 if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
  18   OS=GNU/Linux
  19 else
  20   OS="${GRUB_DISTRIBUTOR} GNU/Linux"
  21   CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr '[A-Z]' '[a-z]' | cut -d' ' -f1) ${CLASS}"
  22 fi
  23
  24 # loop-AES arranges things so that /dev/loop/X can be our root device, but
  25 # the initrds that Linux uses don't like that.
  26 case ${GRUB_DEVICE} in
  27   /dev/loop/*|/dev/loop[0-9])
  28     GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
  29   ;;
  30 esac
  31
  32 if [ "x${GRUB_DEVICE_UUID}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
  33     || ! test -e "/dev/disk/by-uuid/${GRUB_DEVICE_UUID}" \
  34     || [ "`grub-probe -t abstraction --device ${GRUB_DEVICE} | sed -e 's,.*\(lvm\).*,\1,'`" = "lvm"  ] ; then
  35   LINUX_ROOT_DEVICE=${GRUB_DEVICE}
  36 else
  37   LINUX_ROOT_DEVICE=UUID=${GRUB_DEVICE_UUID}
  38 fi
  39
  40 xen_entry ()
  41 {
  42   os="$1"
  43   xen_version="$2"
  44   version="$3"
  45   xen_args="$4"
  46   args="$5"
  47   printf "menuentry 'Xen %s / %s, with Linux %s' --class xen ${CLASS} {\n" "${xen_version}" "${os}" "${version}"
  48   save_default_entry | sed -e "s/^/\t/"
  49
  50   if [ -z "${prepare_boot_cache}" ]; then
  51     prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/\t/")"
  52   fi
  53   printf '%s\n' "${prepare_boot_cache}"
  54   cat << EOF
  55        echo    '$(printf "Loading Xen %s ..." ${xen_version})'
  56        multiboot       ${rel_dirname}/${xen_basename} ${rel_dirname}/${xen_basename} ${xen_args}
  57        echo    $(printf "$(gettext "Loading Linux %s ...")" ${version})
  58        module  ${rel_dirname}/${basename} ${rel_dirname}/${basename} root=${linux_root_device_thisversion} ro ${args}
  59 EOF
  60   if test -n "${initrd}" ; then
  61     cat << EOF
  62        echo    "Loading initial ramdisk ..."
  63        module  ${rel_dirname}/${initrd}
  64 EOF
  65   fi
  66   cat << EOF
  67 }
  68 EOF
  69 }
  70
  71 xen_list=`for i in /boot/xen-*.gz /xen-*.gz ; do
  72        if grub_file_is_not_garbage "$i" ; then echo -n "$i "; fi
  73 done`
  74 prepare_boot_cache=
  75
  76 while [ "x$xen_list" != "x" ] ; do
  77   xen=`version_find_latest $xen_list`
  78   echo "Found Xen hypervisor image: $xen" >&2
  79   xen_basename=`basename $xen`
  80   xen_dirname=`dirname $xen`
  81   rel_xen_dirname=`make_system_path_relative_to_its_root $xen_dirname`
  82   xen_version=`echo $xen_basename | sed -e "s,^[^0-9]*-,,g" | sed -e "s,.gz,,g"`
  83   alt_xen_version=`echo $xen_version | sed -e "s,\.old$,,g"`
  84
  85   xen_configfiles=`grep -l 'CONFIG_XEN_PRIVILEGED_GUEST=y' /boot/config-*`
  86
  87   list="/boot/vmlinuz-linux";
  88
  89   while [ "x$list" != "x" ] ; do
  90     linux=`version_find_latest $list`
  91     echo -e "\tFound linux image: $linux" >&2
  92     basename=`basename $linux`
  93     dirname=`dirname $linux`
  94     rel_dirname=`make_system_path_relative_to_its_root $dirname`
  95     version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`
  96     base_init=`echo $basename | sed -e "s,vmlinuz,initramfs,g"`
  97     alt_version="${base_init}-fallback"
  98     linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
  99     initrd=
 100
 101     for i in "${base_init}.img"; do
 102        if test -e "${dirname}/${i}" ; then
 103          initrd="$i"
 104          break
 105        fi
 106     done
 107     if test -n "${initrd}" ; then
 108       echo -e "\tFound initrd image: ${dirname}/${initrd}" >&2
 109     else
 110       # "UUID=" magic is parsed by initrds.  Since there's no initrd, it can't work here.
 111       linux_root_device_thisversion=${GRUB_DEVICE}
 112     fi
 113
 114     xen_entry "${OS}" "${xen_version}" "${version}" \
 115         "${XEN_HYPERVISOR_CMDLINE}" \
 116        "${XEN_LINUX_CMDLINE}"
 117
 118     list=`echo $list | tr ' ' '\n' | grep -vx $linux | tr '\n' ' '`
 119   done
 120
 121   xen_list=`echo $xen_list | tr ' ' '\n' | grep -vx $xen | tr '\n' ' '`
 122 done
 123