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#!/bin/bash
# provides some general-purpose script functions
#
# Copyright (C) 2004 Eric Marchionni, Patrik Rayo
# Zuercher Hochschule Winterthur
#
# 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 2 of the License, or (at your
# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
#
# 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.
############################################
# print output in color
#
function cecho {
echo -e "\033[1;31m$1\033[0m"
}
function cgecho {
echo -e "\033[1;32m$1\033[0m"
}
function cecho-n {
echo -en "\033[1;31m$1\033[0m"
}
#############################################
# output all args to stderr and exit with
# return code 1
#
die() {
echo $* 1>&2
exit 1
}
#############################################
# search and replace strings throughout a
# whole directory
#
function searchandreplace {
SEARCHSTRING="$1"
REPLACESTRING="$2"
DESTDIR="$3"
[ -d "$DESTDIR" ] || die "$DESTDIR is not a directory!"
#########################
# create a temporary file
#
TMPFILE="/tmp/sr.$$"
###########################################
# search and replace in each found file the
# given string
#
for eachfoundfile in `find $DESTDIR -type f`
do
sed -e "s/$SEARCHSTRING/$REPLACESTRING/g" "$eachfoundfile" > "$TMPFILE"
cp -f "$TMPFILE" "$eachfoundfile"
done
###########################
# delete the temporary file
#
rm -f "$TMPFILE"
}
#############################################
# add a bridge
#
function umlbr_add {
brctl addbr "umlbr$1"
brctl setfd "umlbr$1" 0
brctl setageing "umlbr$1" 3600
brctl stp "umlbr$1" off
ifconfig "umlbr$1" "$2" netmask "$3" up
}
#############################################
# delete a bridge
#
function umlbr_del {
ifconfig "umlbr$1" down &> /dev/null 2>&1
brctl delbr "umlbr$1" &> /dev/null 2>&1
}
#############################################
# add a tap interface to a bridge
#
function umlbr_add_tap {
tunctl -t "tap$1_$2" &> /dev/null 2>&1
ifconfig "tap$1_$2" 0.0.0.0 promisc up &> /dev/null 2>&1
brctl addif "umlbr$1" "tap$1_$2" &> /dev/null 2>&1
cecho-n "$2.."
}
#############################################
# delete a tap interface from a bridge
#
function umlbr_del_tap {
ifconfig "umlbr$2" down &> /dev/null 2>&1
brctl delif "umlbr$1" "tap$1_$2" &> /dev/null 2>&1
tunctl -d "tap$1_$2" &> /dev/null 2>&1
cecho-n "$2.."
}
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