+
+check_kernel_space() {
+ local available_disk_space kernel_size
+ available_disk_space=$(free_space /)
+ kernel_size=$(installed_size kernel-2.6-cn)
+
+ if [ $? -ne 0 ]; then
+ log "Failed to get installed size, skipping check."
+ return 0
+ fi
+
+ log "Free space in /: ${available_disk_space}MB"
+ log "Kernel size: ${kernel_size}MB"
+
+ if LC_ALL=C apt-get --yes --print-uris install kernel-2.6-cn \
+ | grep -q '^kernel-2.6-cn is already the newest version.$'
+ then
+ log "Not checking free space in /: kernel-2.6-cn already installed"
+ return
+ fi
+
+ if [ $available_disk_space -lt $kernel_size ]; then
+ log "carnet-upgrade aborted: not enough space in / (have ${available_disk_space}MB, need ${kernel_size}MB)"
+ notice "Premalo mjesta u / za instalaciju kernela (potrebno je barem ${kernel_size}MB). Procitajte poglavlje 'Izvanredne situacije' u dokumentaciji."
+ exit 1
+ fi
+}
+
+free_space() {
+ df --portability --block-size=1M "$1" | tail -1 | awk '{print $4}'
+}
+
+download_size() {
+ local size
+ size=$(LC_ALL=C apt-get --yes --print-uris "$@" | grep '^Need to get ')
+
+ if [ $? -ne 0 ]; then
+ log "Failed to get download size for 'apt-get $@'."
+ return 1
+ fi
+
+ size=${size#Need to get }
+ size=${size%%B*}
+
+ size_to_mb "${size}B"
+}
+
+installed_size() {
+ local package size
+ package=$1
+ size=$(apt-cache show $package | grep '^Installed-Size:')
+
+ if [ $? -ne 0 ]; then
+ log "Failed to get installed size for '$package'."
+ return 1
+ fi
+
+ size=${size#*: }
+
+ size_to_mb "${size}kB"
+}
+
+size_to_mb() {
+ local size
+ size=$1
+ if [ -z "$size" ]; then
+ size=0;
+ fi
+
+ if [ "${size%kB}" != "$size" ]; then
+ size=$(round ${size%kB})
+ size=$(($size/1024+1))
+ elif [ "${size%MB}" != "$size" ]; then
+ size=$(round ${size%MB})
+ elif [ "${size%GB}" != "$size" ]; then
+ size=$(round ${size%GB})
+ size=$(($size*1024))
+ elif [ "${size%[0-9]B}" != "$size" ]; then
+ size=$(round ${size%B})
+ size=$(($size/1024/1024+1))
+ else
+ log "unrecognized size unit: $size"
+ return 1
+ fi
+
+ echo $size
+}
+
+round() {
+ local num
+ num=$1
+
+ if [ "${num%.*}" != "$num" ]; then
+ num=${num%.*}
+ num=$(($num+1))
+ fi
+
+ echo $num
+}