# # While installing a rpm to update kernel on a deployed target, it will update # the boot area and the boot menu with the kernel as the priority but allow # you to fall back to the original kernel as well. # # - In kernel-image's preinstall scriptlet, it backs up original kernel to avoid # probable confliction with the new one. # # - In kernel-image's postinstall scriptlet, it modifies grub's config file to # updates the new kernel as the boot priority. # python __anonymous () { import re preinst = ''' # Parsing confliction [ -f "$D/boot/grub/menu.list" ] && grubcfg="$D/boot/grub/menu.list" [ -f "$D/boot/grub/grub.cfg" ] && grubcfg="$D/boot/grub/grub.cfg" if [ -n "$grubcfg" ]; then # Dereference symlink to avoid confliction with new kernel name. if grep -q "/KERNEL_IMAGETYPE \+root=" $grubcfg; then if [ -L "$D/boot/KERNEL_IMAGETYPE" ]; then kimage=`realpath $D/boot/KERNEL_IMAGETYPE 2>/dev/null` if [ -f "$D$kimage" ]; then sed -i "s:KERNEL_IMAGETYPE \+root=:${kimage##*/} root=:" $grubcfg fi fi fi # Rename old kernel if it conflicts with new kernel name. if grep -q "/KERNEL_IMAGETYPE-${KERNEL_VERSION} \+root=" $grubcfg; then if [ -f "$D/boot/KERNEL_IMAGETYPE-${KERNEL_VERSION}" ]; then timestamp=`date +%s` kimage="$D/boot/KERNEL_IMAGETYPE-${KERNEL_VERSION}-$timestamp-back" sed -i "s:KERNEL_IMAGETYPE-${KERNEL_VERSION} \+root=:${kimage##*/} root=:" $grubcfg mv "$D/boot/KERNEL_IMAGETYPE-${KERNEL_VERSION}" "$kimage" fi fi fi ''' postinst = ''' get_new_grub_cfg() { grubcfg="$1" old_image="$2" title="Update KERNEL_IMAGETYPE-${KERNEL_VERSION}-${PV}" if [ "${grubcfg##*/}" = "grub.cfg" ]; then rootfs=`grep " *linux \+[^ ]\+ \+root=" $grubcfg -m 1 | \ sed "s#${old_image}#${old_image%/*}/KERNEL_IMAGETYPE-${KERNEL_VERSION}#"` echo "menuentry \"$title\" {" echo " set root=(hd0,1)" echo "$rootfs" echo "}" elif [ "${grubcfg##*/}" = "menu.list" ]; then rootfs=`grep "kernel \+[^ ]\+ \+root=" $grubcfg -m 1 | \ sed "s#${old_image}#${old_image%/*}/KERNEL_IMAGETYPE-${KERNEL_VERSION}#"` echo "default 0" echo "timeout 30" echo "title $title" echo "root (hd0,0)" echo "$rootfs" fi } get_old_grub_cfg() { grubcfg="$1" if [ "${grubcfg##*/}" = "grub.cfg" ]; then cat "$grubcfg" elif [ "${grubcfg##*/}" = "menu.list" ]; then sed -e '/^default/d' -e '/^timeout/d' "$grubcfg" fi } if [ -f "$D/boot/grub/grub.cfg" ]; then grubcfg="$D/boot/grub/grub.cfg" old_image=`grep ' *linux \+[^ ]\+ \+root=' -m 1 "$grubcfg" | awk '{print $2}'` elif [ -f "$D/boot/grub/menu.list" ]; then grubcfg="$D/boot/grub/menu.list" old_image=`grep '^kernel \+[^ ]\+ \+root=' -m 1 "$grubcfg" | awk '{print $2}'` fi # Don't update grubcfg at first install while old bzImage doesn't exist. if [ -f "$D/boot/${old_image##*/}" ]; then grubcfgtmp="$grubcfg.tmp" get_new_grub_cfg "$grubcfg" "$old_image" > $grubcfgtmp get_old_grub_cfg "$grubcfg" >> $grubcfgtmp mv $grubcfgtmp $grubcfg echo "Caution! Update kernel may affect kernel-module!" fi ''' imagetypes = d.getVar('KERNEL_IMAGETYPES') imagetypes = re.sub(r'\.gz$', '', imagetypes) for type in imagetypes.split(): typelower = type.lower() preinst_append = preinst.replace('KERNEL_IMAGETYPE', type) postinst_prepend = postinst.replace('KERNEL_IMAGETYPE', type) d.setVar('pkg_preinst_kernel-image-' + typelower + '_append', preinst_append) d.setVar('pkg_postinst_kernel-image-' + typelower + '_prepend', postinst_prepend) }