Software center in 12.10, can't continue install step, once refuse the license terms

[lionjohn]

I want to create a debian .deb package and add a license terms process interface with user during installation of package

So I added a shell script process in preinst file to the license tems.

But once I refused the license, Software-center dumped to the refuse step each time, the install process can't be continue anyway.

But my install process and .deb package work very well with another command: "gedebi", "dpkg -i", and I never had a problem

 in another version of Ubuntu .

script code like:

---------debian preinst file code--------------------
. /usr/share/debconf/confmodule
db_version 2.0
db_capb backup

#Intel property licence
license=LICENSE_NAME

errmsg()
{
    echo >&2 ''
    echo >&2 "$@"
    echo >&2 "try 'dpkg-reconfigure debconf' to select a frontend other than noninteractive"
    echo >&2 ''
}

# facilitate backup capability per debconf-devel(7)
STATE=1
while true; do
    case "$STATE" in
    0) # ensure going back from license presentment is harmless
        STATE=1
        continue
        ;;
    1) # present license
        db_fset shared/present-$license seen false
        if ! db_input critical shared/present-$license ; then
            errmsg "$license license could not be presented"
     exit 2
        fi
        db_fset shared/accepted-$license seen false
        if ! db_input critical shared/accepted-$license ; then
            errmsg "$license agree question could not be asked"
     exit 2
        fi
        ;;
    2) # determine users' choice
        db_get shared/accepted-$license
        if [ "$RET" = "true" ]; then
     # license accepted
            exit 0
        fi
        # error on decline license (give user chance to back up)
        db_input critical shared/error-$license
        ;;
    3) # user has confirmed declining license
        echo "user did not accept the $license license" >&2
        exit 1
        ;;
    *) # unknown state
        echo "$license license state unknown: $STATE" >&2
        exit 2
        ;;
    esac
    if db_go; then
        STATE=$(($STATE + 1))
    else
        STATE=$(($STATE - 1))
    fi
done

# proper exit (0 or 1) above
errmsg "$license license could not be presented / was not accepted"
exit 2

----------end of code--------------------