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#!/bin/sh
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. /lib/partman/definitions.sh
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# If you are curious why partman-auto is so slow, it is because
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# update-all is slow
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update_all () {
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local dev num id size type fs path name partitions
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for dev in $DEVICES/*; do
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[ -d "$dev" ] || continue
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cd $dev
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partitions=''
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open_dialog PARTITIONS
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while { read_line num id size type fs path name; [ "$id" ]; }; do
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partitions="$partitions $id"
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done
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close_dialog
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for id in $partitions; do
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update_partition $dev $id
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done
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done
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}
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autopartitioning_failed () {
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db_fset partman-auto/autopartitioning_failed seen false
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db_input critical partman-auto/autopartitioning_failed || true
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db_go || true
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update_all
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exit 1
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}
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unnamed=0
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decode_recipe () {
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local ram line word min factor max fs -
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unnamed=$(($unnamed + 1))
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ram=$(cat /proc/meminfo | grep ^Mem: | { read x y z; echo $y; }) # in bytes
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ram=$(expr 000000"$ram" : '0*\(.*\)......$') # convert to megabytes
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name="Unnamed.${unnamed}"
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scheme=''
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line=''
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for word in $(cat $1); do
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case $word in
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:)
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name=$line
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line=''
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;;
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::)
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db_metaget $line description
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if [ "$RET" ]; then
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name=$RET
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else
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name="Unnamed.${unnamed}"
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fi
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line=''
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;;
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.)
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# correct errors in order not to crash parted_server
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set -- $line
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if expr "$1" : '[0-9][0-9]*$' >/dev/null; then
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min=$1
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elif expr "$1" : '[0-9][0-9]*%$' >/dev/null; then
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min=$(($ram * ${1%?} / 100))
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else
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min=2200000000
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fi
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if expr "$2" : '[0-9][0-9]*%$' >/dev/null; then
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factor=$(($ram * ${2%?} / 100))
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elif expr "$2" : '[0-9][0-9]*$' >/dev/null; then
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factor=$2
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else
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factor=$min
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fi
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if [ "$factor" -lt "$min" ]; then
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factor="$min"
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fi
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if expr "$3" : '[0-9][0-9]*$' >/dev/null; then
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max=$3
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elif expr "$3" : '[0-9][0-9]*%$' >/dev/null; then
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max=$(($ram * ${3%?} / 100))
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else
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max=$min
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fi
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if [ "$max" -lt "$min" ]; then
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max="$min"
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fi
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case "$4" in
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ext2|ext3|linux-swap|fat16|fat32)
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fs="$4"
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;;
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*)
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fs=ext2
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;;
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esac
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shift; shift; shift; shift
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line="$min $factor $max $fs $*"
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if [ "$scheme" ]; then
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scheme="${scheme}${NL}${line}"
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else
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scheme="$line"
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fi
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line=''
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;;
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*)
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if [ "$line" ]; then
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line="$line $word"
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else
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line="$word"
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fi
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esac
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done
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}
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foreach_partition () {
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local - doing IFS partition former last
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doing=$1
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IFS="$NL"
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former=''
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for partition in $scheme; do
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restore_ifs
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if [ "$former" ]; then
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set -- $former
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last=no
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eval "$doing"
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fi
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former="$partition"
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done
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if [ "$former" ]; then
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set -- $former
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last=yes
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eval "$doing"
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fi
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}
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min_size () {
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local size
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size=0
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foreach_partition '
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size=$(($size + $1))'
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echo $size
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}
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factor_sum () {
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local factor
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factor=0
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foreach_partition '
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factor=$(($factor + $2))'
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echo $factor
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}
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partition_before () {
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local num id size type fs path name result found
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result=''
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found=no
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open_dialog PARTITIONS
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while { read_line num id size type fs path name; [ "$id" ]; }; do
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if [ "$id" = "$1" ]; then
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found=yes
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fi
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if [ $found = no ]; then
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result=$id
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fi
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done
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close_dialog
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echo $result
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}
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partition_after () {
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local num id size type fs path name result found
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result=''
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found=no
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open_dialog PARTITIONS
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while { read_line num id size type fs path name; [ "$id" ]; }; do
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if [ $found = yes -a -z "$result" ]; then
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result=$id
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fi
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if [ "$id" = "$1" ]; then
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found=yes
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fi
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done
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close_dialog
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echo $result
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}
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pull_primary () {
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primary=''
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secondary=''
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foreach_partition '
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if
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[ -z "$primary" ] \
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&& echo $* | grep '\''\$primary{'\'' >/dev/null
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then
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primary="$*"
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else
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if [ -z "$secondary" ]; then
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secondary="$*"
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else
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secondary="${secondary}${NL}$*"
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fi
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fi'
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}
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setup_partition () {
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local id flags file line
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id=$1; shift
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while [ "$1" ]; do
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case "$1" in
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\$bootable{)
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while [ "$1" != '}' -a "$1" ]; do
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shift
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done
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open_dialog GET_FLAGS $id
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flags=$(read_paragraph)
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close_dialog
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open_dialog SET_FLAGS $id
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write_line "$flags"
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write_line boot
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write_line NO_MORE
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close_dialog
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;;
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\$*{)
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while [ "$1" != '}' -a "$1" ]; do
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shift
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done
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;;
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*{)
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file=${1%?}
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[ -d $id ] || mkdir $id
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>$id/$file
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shift
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line=''
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while [ "$1" != '}' -a "$1" ]; do
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if [ "$1" = ';' ]; then
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echo "$line" >>$id/$file
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else
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if [ "$line" ]; then
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line="$line $1"
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else
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line="$1"
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fi
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fi
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shift
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done
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echo "$line" >>$id/$file
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esac
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shift
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done
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return 0
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}
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# Let us be safe and update the directories
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update_all
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dev=$1
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free_space=$2
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cd $dev
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open_dialog PARTITION_INFO $free_space
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read_line x1 x2 free_size free_type x3 x4 x5
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close_dialog
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if [ "$free_type" = unusable ]; then
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db_fset partman-auto/unusable_space seen false
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db_input critical partman-auto/unusable_space || true
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db_go || true
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exit 1
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fi
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free_size=$(expr 000000"$free_size" : '0*\(.*\)......$') # convert to megabytes
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choices=''
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for recipe in /lib/partman/recipes/*; do
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[ -f "$recipe" ] || continue
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decode_recipe $recipe
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if [ $(min_size) -le $free_size ]; then
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choices="${choices}${recipe}${TAB}${name}${NL}"
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fi
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done
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db_metaget partman-auto/text/expert_recipe description
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choices="${choices}expert${TAB}${RET}"
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db_fset partman-auto/choose_recipe seen false
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debconf_select high partman-auto/choose_recipe "$choices" no_default
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if [ "$?" = 255 ]; then
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exit 0
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fi
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case $RET in
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expert)
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db_fset partman-auto/expert_recipe seen false
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db_input critical partman-auto/expert_recipe || true
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if ! db_go; then
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exit 1
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fi
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decode_recipe $RET
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;;
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*)
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decode_recipe $RET
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;;
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esac
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# Make factors small numbers so we can multiply on them.
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# Also ensure that fact, max and fs are valid
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# (Ofcourse in valid recipes they must be valid.)
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factsum=$(($(factor_sum) - $(min_size)))
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scheme=$(
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foreach_partition '
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local min fact max fs
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min=$1
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fact=$((($2 - $min) * 100 / $factsum))
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max=$3
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fs=$4
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case "$fs" in
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ext2|ext3|linux-swap|fat16|fat32)
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true
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;;
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*)
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fs=ext2
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;;
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esac
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shift; shift; shift; shift
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echo $min $fact $max $fs $*'
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)
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oldscheme=''
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while [ "$scheme" != "$oldscheme" ]; do
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oldscheme="$scheme"
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factsum=$(factor_sum)
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unallocated=$(($free_size - $(min_size)))
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if [ $unallocated -lt 0 ]; then
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unallocated=0
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fi
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scheme=$(
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foreach_partition '
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local min fact max newmin
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min=$1
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fact=$2
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max=$3
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shift; shift; shift
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newmin=$(($min + $unallocated * $fact / $factsum))
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if [ $newmin -le $max ]; then
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echo $newmin $fact $max $*
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else
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echo $max 0 $max $*
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fi'
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)
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done
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while
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[ "$free_type" = pri/log ] \
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&& echo $scheme | grep '\$primary{' >/dev/null
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do
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pull_primary
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set -- $primary
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open_dialog NEW_PARTITION primary $4 $free_space beginning ${1}000001
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read_line num id size type fs path name
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close_dialog
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if [ -z "$id" ]; then
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autopartitioning_failed
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fi
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neighbour=$(partition_after $id)
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if [ "$neighbour" ]; then
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open_dialog PARTITION_INFO $neighbour
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read_line x1 new_free_space x2 new_free_type fs x3 x4
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close_dialog
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fi
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if
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[ -z "$neighbour" -o "$fs" != free -o "$new_free_type" = unusable ]
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then
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open_dialog DELETE_PARTITION $id
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close_dialog
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open_dialog NEW_PARTITION primary $4 $free_space end ${1}000001
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read_line num id size type fs path name
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close_dialog
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if [ -z "$id" ]; then
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autopartitioning_failed
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fi
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neighbour=$(partition_before $id)
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if [ "$neighbour" ]; then
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open_dialog PARTITION_INFO $neighbour
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read_line x1 new_free_space x2 new_free_type fs x3 x4
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close_dialog
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fi
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if
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[ -z "$neighbour" -o "$fs" != free -o "$new_free_type" = unusable ]
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then
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open_dialog DELETE_PARTITION $id
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close_dialog
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autopartitioning_failed
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fi
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fi
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shift; shift; shift; shift
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setup_partition $id $*
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primary=''
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scheme="$secondary"
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free_space=$new_free_space
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free_type="$new_free_type"
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done
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foreach_partition '
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if [ -z "$free_space" ]; then
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autopartitioning_failed
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fi
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open_dialog PARTITION_INFO $free_space
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read_line x1 free_space x2 free_type fs x3 x4
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close_dialog
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if [ "$fs" != free ]; then
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free_type=unusable
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fi
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case "$free_type" in
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primary|logical)
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type="$free_type"
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;;
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pri/log)
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type=logical
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;;
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unusable)
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autopartitioning_failed
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;;
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esac
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if [ "$last" = yes ]; then
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open_dialog NEW_PARTITION $type $4 $free_space full ${1}000001
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else
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open_dialog NEW_PARTITION $type $4 $free_space beginning ${1}000001
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fi
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read_line num id size type fs path name
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close_dialog
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if [ -z "$id" ]; then
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autopartitioning_failed
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fi
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shift; shift; shift; shift
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setup_partition $id $*
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434 |
free_space=$(partition_after $id)'
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436 |
update_all
|