#!/bin/bash
# postinst script for nbd-client
#
# see: dh_installdeb(1)

set -e

. /usr/share/debconf/confmodule

# 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 /usr/share/doc/packaging-manual/
#
# 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'.

translate_extra() {
        sep="\t"
        while [ ! -z "$1" ]
        do
                case "$1" in
                        -b*)
                                opt=$2
                                NBD_OPT="${NBD_OPT}${sep}bs=${opt}"
                                shift
                        ;;
                        -t*)
                                opt=$2
                                NBD_OPT="${NBD_OPT}${sep}timeout=${opt}"
                                shift
                        ;;
                        -sdp|-S)
                                NBD_OPT="${NBD_OPT}${sep}sdp"
                        ;;
                        -p*)
                                NBD_OPT="${NBD_OPT}${sep}persist"
                        ;;
                        -unix|-u)
                                NBD_OPT="${NBD_OPT}${sep}unix"
                        ;;
                        -swap|-s)
                                NBD_OPT="${NBD_OPT}${sep}swap"
                        ;;
                esac
                shift
                sep=","
        done
}

convert_from_sh() {
        if [ ! -e /etc/nbd-client ]
        then
                # nothing to convert from
                return
        fi
        local old_md5sum=$(dpkg-query -W -f='${Conffiles}' nbd-client | awk '/nbdtab/{print $2}')
        local new_md5sum=$(md5sum /etc/nbdtab)
        if [ "$old_md5sum" != "$new_md5sum" ]
        then
                # nbdtab locally modified
                return
        fi
        TMPFILE=$(mktemp /tmp/nbd-client.XXXXXX)
        . /etc/nbd-client
        # check if we may auto-generate
        if [ "$AUTO_GEN" == "n" ]
        then
                db_get nbd-client/no-auto-config
                db_go
                db_stop
                return
        fi
        # check for KILLALL, which isn't supported anymore
        if [ "$KILLALL" != "false" ]
        then
                db_get nbd-client/killal_set
                db_go
                db_stop
                return
        fi
        i=0
        while [ ! -z "${NBD_TYPE[$i]}" ]
        do
                NBD_DEVICE[$i]=${NBD_DEVICE[$i]#/dev/}
                NBD_OPT=""
                translate_extra ${NBD_EXTRA[$i]}
                echo -e "${NBD_DEVICE[$i]}\t${NBD_HOST[$i]}\t${NBD_NAME[$i]}${NBD_OPT}" >> $TMPFILE
                i=$(( $i + 1 ))
        done
        mv $TMPFILE /etc/nbdtab
        chmod 644 /etc/nbdtab
        mv /etc/nbd-client /etc/nbd-client.old
}

case "$1" in
        configure)
                convert_from_sh
                # Invoke initramfs trigger
                if [ -f /$(which update-initramfs) ]
                then
                        update-initramfs -u
                fi
                # Migrate sendsigs.omit.d file
                if [ -f /lib/init/rw/sendsigs.omit.d/nbd-client ]
                then
                        mv /lib/init/rw/sendsigs.omit.d/nbd-client /run/sendsigs.omit.d
                fi
        ;;

        abort-upgrade|abort-remove|abort-deconfigure)
                # We need not do anything.
        ;;

        *)
                echo "postinst called with unknown argument \`$1'" >&2
                exit 0
        ;;
esac

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

# Automatically added by dh_installinit/12.1.1
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/nbd-client" ]; then
		update-rc.d nbd-client start 41 S . stop 34 0 6 . >/dev/null || exit 1
	fi
fi
# End automatically added section


exit 0