Bug#471323: support powers of 1024 when parsing user input (kiB, MiB, ...)

[Robert Millan]

Package: partman-base
Severity: wishlist
Tags: patch

This patch allows partman to accept kiB / MiB / etc suffixes that represent
powers of 1024.

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.18-6-amd64 (SMP w/2 CPU cores)
Locale: LANG=ca_AD.UTF-8, LC_CTYPE=ca_AD.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Index: partman-base/lib/base.sh
===================================================================
--- partman-base/lib/base.sh    (revision 51657)
+++ partman-base/lib/base.sh    (working copy)
@@ -218,10 +218,11 @@
 }
 
 human2longint () {
-       local human suffix int frac longint
+       local human suffix int frac longint i_modifier
        set -- $*; human="$1$2$3$4$5" # without the spaces
        human=${human%b} #remove last b
        human=${human%B} #remove last B
+       i_modifier=${human#${human%i}} ; human=${human%i} # 'i' modifier (if 
present)
        suffix=${human#${human%?}} # the last symbol of $human
        case $suffix in
        k|K|m|M|g|G|t|T)
@@ -233,6 +234,23 @@
        esac
        int="${human%[.,]*}"
        [ "$int" ] || int=0
+
+       if [ "$i_modifier" = "i" ] ; then
+               local k=1024
+               longint=$(expr "$int" \* $k)
+               case $suffix in
+               m|M|"")
+                       longint=$(expr "$longint" \* $k)
+                       ;;
+               g|G)
+                       longint=$(expr "$longint" \* $k \* $k)
+                       ;;
+               t|T)
+                       longint=$(expr "$longint" \* $k \* $k \* $k)
+                       ;;
+               esac
+       else
+# FIXME!! indentation intentionally omitted to simplify the patch
        frac=${human#$int}
        frac="${frac#[.,]}0000" # to be sure there are at least 4 digits
        frac=${frac%${frac#????}} # only the first 4 digits of $frac
@@ -258,6 +276,7 @@
                longint=${longint}00
                ;;
        esac
+       fi
        echo $longint
 }