config/binary_local-hooks/20-syslinux_detect_cpu

   1 #!/bin/bash
   2
   3 set -e
   4
   5 # Including common functions
   6 . "${LB_BASE:-/usr/share/live/build}"/scripts/build.sh
   7
   8 # Setting static variables
   9 DESCRIPTION="$(Echo 'adding CPU autodetection to the syslinux menu')"
  10 HELP=""
  11 USAGE="${PROGRAM}"
  12
  13 # Reading configuration files
  14 Read_conffiles config/all config/bootstrap config/common config/binary
  15 Set_defaults
  16
  17 # Safeguards
  18 if [ "${LB_BOOTLOADER}" != "syslinux" ]
  19 then
  20         exit 0
  21 fi
  22 if [ "${LB_ARCHITECTURE}" != "i386" ]
  23 then
  24         exit 0
  25 fi
  26
  27 # Seems like we'll have work to do
  28 Echo_message "adding CPU autodetection to the syslinux menu"
  29
  30 # Setting boot method specific variables
  31 case "${LB_BINARY_IMAGES}" in
  32         iso|iso-hybrid)
  33                 SYSLINUX_PATH="binary/isolinux"
  34                 SYSLINUX_CFG="${SYSLINUX_PATH}/isolinux.cfg"
  35                 ;;
  36         usb-hdd)
  37                 SYSLINUX_PATH="binary/syslinux"
  38                 SYSLINUX_CFG="${SYSLINUX_PATH}/syslinux.cfg"
  39                 ;;
  40 esac
  41
  42 # Setting variables
  43 SYSLINUX_LIVE_CFG="${SYSLINUX_PATH}/live.cfg"
  44 SYSLINUX_MENU_CFG="${SYSLINUX_PATH}/menu.cfg"
  45
  46 # Checking depends
  47 Check_package chroot/usr/bin/syslinux syslinux
  48
  49 # Restoring cache
  50 Restore_cache cache/packages_binary
  51
  52 # Installing depends
  53 Install_package
  54
  55 # Copy necessary syslinux modules
  56 for module in ifcpu64.c32
  57 do
  58         cp "chroot/usr/lib/syslinux/${module}" "${SYSLINUX_PATH}/"
  59 done
  60
  61 # Saving cache
  62 Save_cache cache/packages_binary
  63
  64 # Removing depends
  65 Remove_package
  66
  67 # Replace syslinux.cfg with autodetection "code"
  68 cat > "${SYSLINUX_CFG}" <<EOF
  69 label select_menu
  70        com32 ifcpu64.c32
  71        append menu_amd64 -- menu_486 -- menu_486
  72 label menu_amd64
  73        kernel vesamenu.c32
  74        append liveamd64.cfg
  75 label menu_486
  76        kernel vesamenu.c32
  77        append live486.cfg
  78 default select_menu
  79 prompt 0
  80 EOF
  81
  82 # Set a few variables in menu.cfg as loading vesamenu.c32 resets its
  83 # state to the defaults
  84 sed -i -e "1i prompt 0\ntimeout 40\n" "${SYSLINUX_MENU_CFG}"
  85
  86 # Copy and adapt live.cfg for each kernel
  87 for arch in 486 amd64
  88 do
  89         (
  90                 echo "include menu.cfg"
  91
  92                 if [ $arch = 486 ]; then
  93                    append=""
  94                 else
  95                    append=2
  96                 fi
  97                 sed -e "s,/vmlinuz$,/vmlinuz${append}, ; s,initrd\.img,initrd${append}.img," "${SYSLINUX_LIVE_CFG}"
  98         ) | sed -n -e '/^label live-amd64.*/ { q } ; p' \
  99           > "${SYSLINUX_PATH}/live${arch}.cfg"
 100 done
 101
 102 # Don't load live.cfg from menu.cfg:
 103 # syslinux_cfg automatically loads arch-specific menus
 104 sed -i -e '/^include live\.cfg/d' "${SYSLINUX_MENU_CFG}"