+# try to check if we are using the latest version of carnet-upgrade script
+check_my_version () {
+ local packages latest_version
+
+ packages=$(mktemp /var/lib/carnet-upgrade/Packages.XXXXXX)
+ if wget -q -O$packages $packages_uri; then
+ latest_version=$(sed -ne \
+ '/Package: carnet-upgrade/,/Description:/{ /Version: /s///p }' \
+ $packages)
+ rm -f $packages
+
+ if [ "$latest_version" ]; then
+ log "Running carnet-upgrade version is $version"
+ log "Latest carnet-upgrade version is $latest_version"
+ if dpkg --compare-versions "$version" lt "$latest_version"; then
+ check_upgrade " carnet-upgrade"
+ else log "Already using the latest carnet-upgrade version."; fi
+ else log "Failed to get latest version, skipping check."; fi
+ else log "Failed to download Packages file, skipping check."; fi
+
+ rm -f $packages
+}
+
+check_reboot () {
+ reboot_required || return 0
+
+ LC_MESSAGES=hr_HR dialog --backtitle "$title" --yesno "$reboot_warning" 18 +75
+ if [ $? -eq 0 ]; then
+ log "Reboot before continuing."
+ exit 0
+ else
+ log "Proceed without reboot."
+ fi
+}
+
+# check if the latest kernel is booted
+reboot_required () {
+ local default_kernel kernel_package running_release running_version
+
+ # try to get default kernel from grub2
+ if [ -z "$default_kernel" -a -r "/boot/grub/grub.cfg" ]; then
+ default_kernel=$( awk '
+ $0 ~ /^set default=".*"/ {
+ def = gensub(/default="(.*)"/, "\\1", "1", $2);
+ if (def !~ /^[0-9]+$/) { exit }
+ }
+ $1 == "menuentry" { menuentry+=1 }
+ $1 == "linux" && menuentry==def+1 { print $2; exit }' \
+ /boot/grub/grub.cfg 2>/dev/null )
+ fi
+
+ # try to get default kernel from grub-legacy
+ if [ -z "$default_kernel" -a -r "/boot/grub/menu.lst" ]; then
+ default_kernel=$( awk '
+ $1 == "default" { def = $2;
+ if (def !~ /^[0-9]+$/) { exit } }
+ $1 == "title" { title+=1 }
+ $1 == "kernel" && title==def+1 { print $2; exit }' \
+ /boot/grub/menu.lst 2>/dev/null )
+ fi
+
+ # try to get default kernel from lilo
+ if [ -z "$default_kernel" ] && type lilo >/dev/null 2>&1; then
+ default_kernel=$( lilo -t -v 2>/dev/null \
+ | grep -B3 '[*]$' \
+ | sed -n -e '/^Boot image: / { s///p; q; }' )
+ fi
+
+ if [ -z "$default_kernel" ]; then
+ log "Could not find default kernel"
+ return 1
+ fi
+
+ log "Default kernel image: $default_kernel"
+
+ if [ ! -e "$default_kernel" ]; then
+ # /boot prefix might be missing
+ default_kernel="/boot/${default_kernel#/}"
+ if [ ! -e "$default_kernel" ]; then
+ log "Default kernel image doesn't exist!?"
+ return 1
+ fi
+ fi
+
+ kernel_package=$( dpkg -S $default_kernel | cut -d: -f 1 )
+
+ if [ -z "$kernel_package" ]; then
+ log "Default kernel not installed from a package"
+ return 1
+ fi
+
+ log "Default kernel package: $kernel_package"
+
+ running_release=$( uname -r )
+ running_version=$( uname -v )
+ log "Running kernel: $running_release $running_version"
+
+ if [ "$kernel_package" != "${kernel_package#linux-image-3.2.0-}" ] ||
+ grep -q "$running_release .* $running_version" $default_kernel
+ then
+ log "Latest kernel version is running."
+ return 1
+ else
+ log "Reboot to latest version required."
+ return 0
+ fi
+}
+