source: debian/postinst @ 534

#!/bin/sh

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
#
# quoting from the policy:
#     Any necessary prompting should almost always be confined to the
#     post-installation script, and should be protected with a conditional
#     so that unnecessary prompting doesn't happen if a package's
#     installation fails and the `postinst' is called with `abort-upgrade',
#     `abort-remove' or `abort-deconfigure'.

alternc_conf=/etc/alternc/alternc.conf

# helper to change variables in alternc.conf
change_var () {
    varname=$1; shift;
    value=$1; shift;

    echo "changing var $varname to $value"
    sed -e "s#^${varname}=.*\$#${varname}=${value}#" < $alternc_conf > $alternc_conf.$$ && \
        mv $alternc_conf.$$ $alternc_conf
}

case "$1" in
    configure)

    # Prepare the sasldb for postfix :
    touch /etc/sasldb
    chgrp 33 /etc/sasldb
    chmod g+w /etc/sasldb

    # Source debconf library.
    . /usr/share/debconf/confmodule

    # rebuild local.sh
    cat > /etc/alternc/local.sh <<EOF
#!/bin/sh
#
# AlternC - Web Hosting System
# Purpose of file: Contient les données communes
#                  utilisées par les scripts shell
# Content will be overwritten by postinst on upgrades. Make
# modifications through debconf (dpkg-reconfigure alternc)
EOF

    chown www-data /etc/alternc/local.sh

    for pair in \
    "alternc/desktopname FQDN" \
    "alternc/default_ip DEFAULT_IP" \
    "alternc/default_mx DEFAULT_MX" \
    "alternc/data_part DATA_PART" \
    "alternc/mysql/host MYSQL_HOST" \
    "alternc/mysql/db MYSQL_DATABASE" \
    "alternc/mysql/user MYSQL_USER" \
    "alternc/mysql/password MYSQL_PASS"
    do
      skip=0
      for single in $pair
      do
        if [ "$skip" = "0" ]; then
          db_get "$single" || true
          skip=1
        else
          echo "$single=$RET" >> /etc/alternc/local.sh
        fi
      done
    done

    # forget the password
    db_reset alternc/mysql/password || true
    db_fset alternc/mysql/password "seen" "false" || true

    if [ -e /etc/alternc/local.sh ]; then
      # source local.sh variables
      . /etc/alternc/local.sh
    fi

    #
    # rewriting alternc.conf
    #
    change_var "mx" "$DEFAULT_MX"
    change_var "DATA_PART" "$DATA_PART"
    change_var "dbhost" "$MYSQL_HOST"
    change_var "dbuser" "$MYSQL_USER"
    change_var "dbpwd" "$MYSQL_PASS"
    change_var "dbname" "$MYSQL_DATABASE"
    change_var "fqdn" "$FQDN"
    change_var "public_ip" "$DEFAULT_IP"

    for pair in \
    "alternc/internal_ip internal_ip" \
    "alternc/hostingname hosting" \
    "alternc/ns1 ns1" \
    "alternc/ns2 ns2"
    do
      skip=0
      for single in $pair
      do
        if [ "$skip" = "0" ]; then
          var="$single"
          skip=1
        else
          db_get "$var" || true
          change_var "$single" "$RET"
        fi
      done
    done

    # those variables could eventually be prompted for
    echo "The following variables have been left untouched in alternc.conf"
    echo "You will have to review those before manually launching alternc.install"

    cat <<EOF
monitor_ip
bind_internal
myrandom
mynetwork
EOF

    echo "checking for upgrades"
    /usr/share/alternc/install/upgrade_check.sh $2

    ;;

    abort-upgrade|abort-remove|abort-deconfigure)

    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;

esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0