#!/bin/sh
#
# Copyright (c) 2018-2024, Christer Edwards <christer.edwards@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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. /usr/local/share/bastille/common.sh
. /usr/local/etc/bastille/bastille.conf

usage() {
    error_notify "Usage: bastille console [option(s)] TARGET [user]"
    cat << EOF
    Options:

    -a | --auto           Auto mode. Start/stop jail(s) if required.
    -x | --debug          Enable debug mode.

EOF
    exit 1
}

# Handle options.
AUTO=0
while [ "$#" -gt 0 ]; do
    case "${1}" in
        -h|--help|help)
            usage
            ;;
        -a|--auto)
            AUTO=1
            shift
            ;;
        -x|--debug)
            enable_debug
            shift
            ;;
        -*)
            for _opt in $(echo ${1} | sed 's/-//g' | fold -w1); do
                case ${_opt} in
                    x) enable_debug ;;
                    a) AUTO=1 ;;
                    *) error_exit "Unknown Option: \"${1}\"" ;; 
                esac
            done
            shift
            ;;
        *)
            break
            ;;
    esac
done

if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
    usage
fi

TARGET="${1}"
USER="${2}"

bastille_root_check
set_target_single "${TARGET}"
check_target_is_running "${TARGET}" || if [ "${AUTO}" -eq 1 ]; then
    bastille start "${TARGET}"
else
    error_notify "Jail is not running."
    error_exit "Use [-a|--auto] to auto-start the jail."
fi

validate_user() {
    if jexec -l "${TARGET}" id "${USER}" >/dev/null 2>&1; then
        USER_SHELL="$(jexec -l "${_jail}" getent passwd "${USER}" | cut -d: -f7)"
        if [ -n "${USER_SHELL}" ]; then
            if jexec -l "${_jail}" grep -qwF "${USER_SHELL}" /etc/shells; then
                jexec -l "${_jail}" $LOGIN -f "${USER}"
            else
                echo "Invalid shell for user ${USER}"
            fi
        else
            echo "User ${USER} has no shell"
        fi
    else
        echo "Unknown user ${USER}"
    fi
}

check_fib() {
    fib=$(grep 'exec.fib' "${bastille_jailsdir}/${_jail}/jail.conf" | awk '{print $3}' | sed 's/\;//g')
        if [ -n "${fib}" ]; then
            _setfib="setfib -F ${fib}"
        else
            _setfib=""
        fi
}

info "[${TARGET}]:"
LOGIN="$(jexec -l "${TARGET}" which login)"
if [ -n "${USER}" ]; then
    validate_user
else
    check_fib
    LOGIN="$(jexec -l "${TARGET}" which login)"
    ${_setfib} jexec -l "${TARGET}" $LOGIN -f root
fi