hackacad/usr/local/share/bastille/rename.sh

#!/bin/sh
#
# Copyright (c) 2018-2020, Christer Edwards <christer.edwards@gmail.com>
# All rights reserved.
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# * Redistributions of source code must retain the above copyright notice, this
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. /usr/local/share/bastille/common.sh
. /usr/local/etc/bastille/bastille.conf

usage() {
    error_exit "Usage: bastille rename TARGET NEW_NAME"
}

validate_name() {
    local NAME_VERIFY=${NEWNAME}
    local NAME_SANITY=$(echo "${NAME_VERIFY}" | tr -c -d 'a-zA-Z0-9-_')
    if [ "${NAME_VERIFY}" != "${NAME_SANITY}" ]; then
        error_exit "Container names may not contain special characters!"
    fi
}

# Handle special-case commands first
case "$1" in
help|-h|--help)
    usage
    ;;
esac

if [ $# -ne 1 ]; then
    usage
fi

NEWNAME="${1}"

update_jailconf() {
    # Update jail.conf
    JAIL_CONFIG="${bastille_jailsdir}/${NEWNAME}/jail.conf"
    if [ -f "${JAIL_CONFIG}" ]; then
        if ! grep -qw "path = ${bastille_jailsdir}/${NEWNAME}/root;" "${JAIL_CONFIG}"; then
            sed -i '' "s|host.hostname.*=.*${TARGET};|host.hostname = ${NEWNAME};|" "${JAIL_CONFIG}"
            sed -i '' "s|exec.consolelog.*=.*;|exec.consolelog = ${bastille_logsdir}/${NEWNAME}_console.log;|" "${JAIL_CONFIG}"
            sed -i '' "s|path.*=.*;|path = ${bastille_jailsdir}/${NEWNAME}/root;|" "${JAIL_CONFIG}"
            sed -i '' "s|mount.fstab.*=.*;|mount.fstab = ${bastille_jailsdir}/${NEWNAME}/fstab;|" "${JAIL_CONFIG}"
            sed -i '' "s|${TARGET}.*{|${NEWNAME} {|" "${JAIL_CONFIG}"
        fi
    fi
}

update_fstab() {
    # Update fstab to use the new name
    FSTAB_CONFIG="${bastille_jailsdir}/${NEWNAME}/fstab"
    if [ -f "${FSTAB_CONFIG}" ]; then
        FSTAB_RELEASE=$(grep -owE '([1-9]{2,2})\.[0-9](-RELEASE|-RC[1-2])|([0-9]{1,2}-stable-build-[0-9]{1,3})|(current-build)-([0-9]{1,3})|(current-BUILD-LATEST)|([0-9]{1,2}-stable-BUILD-LATEST)|(current-BUILD-LATEST)' "${FSTAB_CONFIG}")
        FSTAB_CURRENT=$(grep -w ".*/releases/.*/jails/${TARGET}/root/.bastille" "${FSTAB_CONFIG}")
        FSTAB_NEWCONF="${bastille_releasesdir}/${FSTAB_RELEASE} ${bastille_jailsdir}/${NEWNAME}/root/.bastille nullfs ro 0 0"
        if [ -n "${FSTAB_CURRENT}" ] && [ -n "${FSTAB_NEWCONF}" ]; then
            # If both variables are set, update as needed
            if ! grep -qw "${bastille_releasesdir}/${FSTAB_RELEASE}.*${bastille_jailsdir}/${NEWNAME}/root/.bastille" "${FSTAB_CONFIG}"; then
                sed -i '' "s|${FSTAB_CURRENT}|${FSTAB_NEWCONF}|" "${FSTAB_CONFIG}"
            fi
        fi
    fi
}

change_name() {
    # Attempt container name change
    info "Attempting to rename '${TARGET}' to ${NEWNAME}..."
    if [ "${bastille_zfs_enable}" = "YES" ]; then
        if [ -n "${bastille_zfs_zpool}" ] && [ -n "${bastille_zfs_prefix}" ]; then
            # Check and rename container ZFS dataset accordingly
            # Perform additional checks in case of non-ZFS existing containers
            if zfs list | grep -qw "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${TARGET}"; then
                if ! zfs rename -f "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${TARGET}" "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${NEWNAME}"; then
                    error_exit "Can't rename '${TARGET}' dataset."
                fi
            else
                # Check and rename container directory instead
                if ! zfs list | grep -qw "jails/${TARGET}$"; then
                    mv "${bastille_jailsdir}/${TARGET}" "${bastille_jailsdir}/${NEWNAME}"
                fi
            fi
        fi
    else
        # Check if container is a zfs/dataset before rename attempt
        # Perform additional checks in case of bastille.conf miss-configuration
        if zfs list | grep -qw "jails/${TARGET}$"; then
            ZFS_DATASET_ORIGIN=$(zfs list | grep -w "jails/${TARGET}$" | awk '{print $1}')
            ZFS_DATASET_TARGET=$(echo "${ZFS_DATASET_ORIGIN}" | sed "s|\/${TARGET}||")
            if [ -n "${ZFS_DATASET_ORIGIN}" ] && [ -n "${ZFS_DATASET_TARGET}" ]; then
                if ! zfs rename -f "${ZFS_DATASET_ORIGIN}" "${ZFS_DATASET_TARGET}/${NEWNAME}"; then
                    error_exit "Can't rename '${TARGET}' dataset."
                fi
            else
                error_exit "Can't determine the ZFS origin path of '${TARGET}'."
            fi
        else
            # Just rename the jail directory
            mv "${bastille_jailsdir}/${TARGET}" "${bastille_jailsdir}/${NEWNAME}"
        fi
    fi

    # Update jail configuration files accordingly
    update_jailconf
    update_fstab

    # Check exit status and notify
    if [ "$?" -ne 0 ]; then
        error_exit "An error has occurred while attempting to rename '${TARGET}'."
    else
        info "Renamed '${TARGET}' to '${NEWNAME}' successfully."
    fi
}

## validate jail name
if [ -n "${NEWNAME}" ]; then
    validate_name
fi

## check if a jail already exists with the new name
if [ -d "${bastille_jailsdir}/${NEWNAME}" ]; then
    error_exit "Jail: ${NEWNAME} already exists."
fi

change_name