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Diffstat (limited to 'contrib/modules/m_calc.sh')
| -rw-r--r-- | contrib/modules/m_calc.sh | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/contrib/modules/m_calc.sh b/contrib/modules/m_calc.sh new file mode 100644 index 0000000..fa1d98d --- /dev/null +++ b/contrib/modules/m_calc.sh @@ -0,0 +1,74 @@ +#!/bin/bash +# -*- coding: utf-8 -*- +########################################################################### +# # +# envbot - an IRC bot in bash # +# Copyright (C) 2007-2008 EmErgE <halt.system@gmail.com> # +# Copyright (C) 2007-2008 Arvid Norlander # +# # +# This program is free software: you can redistribute it and/or modify # +# it under the terms of the GNU General Public License as published by # +# the Free Software Foundation, either version 3 of the License, or # +# (at your option) any later version. # +# # +# This program is distributed in the hope that it will be useful, # +# but WITHOUT ANY WARRANTY; without even the implied warranty of # +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # +# GNU General Public License for more details. # +# # +# You should have received a copy of the GNU General Public License # +# along with this program. If not, see <http://www.gnu.org/licenses/>. # +# # +########################################################################### +#--------------------------------------------------------------------- +## Calculate with bc +## @Dependencies This module depends on bc +## @Dependencies (http://www.gnu.org/software/bc/bc.html) +#--------------------------------------------------------------------- + +module_calc_INIT() { + modinit_API='2' + modinit_HOOKS='' + if ! hash bc > /dev/null 2>&1; then + log_error "Couldn't find \"bc\" command line tool. The calc module depend on that tool." + return 1 + fi + commands_register "$1" 'calc' || return 1 + helpentry_module_calc_description="Simple calculator module." + helpentry_calc_calc_syntax='<expression>' + helpentry_calc_calc_description='Try to calculate <expression> using bc.' +} + +module_calc_UNLOAD() { + return 0 +} + +module_calc_REHASH() { + return 0 +} + +module_calc_handler_calc() { + local sender="$1" + local channel="$2" + local sendernick= + parse_hostmask_nick "$sender" 'sendernick' + # If it isn't in a channel send message back to person who send it, + # otherwise send in channel + if ! [[ $2 =~ ^# ]]; then + channel="$sendernick" + fi + local parameters="$3" + + # Sanity check on parameters + parameters="$(tr -d '\n\r\t' <<< "$parameters")" + if grep -Eq "scale=|read|while|if|for|break|continue|print|return|define|[e|j] *\(" <<< "$parameters"; then + send_msg "$channel" "${sendernick}: Can't calculate that, it contains a potential unsafe/very slow function." + elif [[ $parameters =~ \^[0-9]{4,} ]]; then + send_msg "$channel" "${sendernick}: Some too large numbers." + else + # Force some security guards + local myresult="$(ulimit -t 4; echo "$parameters" | bc -l 2>&1 | head -n 1)" + send_msg "$channel" "${sendernick}: $myresult" + fi + +} |