etc/dists/scripts/functions

#!/bin/bash
#  Copyright (C) 2000-2007 SWsoft. All rights reserved.
#
#  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.
#
#  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, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#

# Set the sane umask
umask 022
CP='/bin/cp -fp'
# overwrite copy arguments as a workaround for FC5 bug #190601 (ovz bug #297)
[ -f /etc/fedora-release ] && CP='/bin/cp -f --preserve=mode,ownership'

# Error codes
VZ_INVALID_PARAMETER_SYNTAX=20
VZ_FS_NO_DISK_SPACE=46
VZ_FS_BAD_TMPL=47
VZ_FS_NEW_VE_PRVT=48
VZ_CHANGEPASS=74
VZ_CANT_ADDIP=34
VZ_IP_INUSE=78

FAKEGATEWAY=192.0.2.1
FAKEGATEWAYNET=192.0.2.0

# Prints error message and exits
# Parameters:
#   $1 - error message
#   $2 - exit code
# Example of usage:
#   error "Fatal error" 1
function error()
{
        # print errors to stdout too
        ERR=$?
        echo "$SELFNAME ERROR: $1"
        exit $2
}

# Puts line
# NAME="value"
# to config file. If NAME is found, line gets replaced,
# otherwise it is added to the end of file.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function put_param()
{
	local file="$1"
	local name="$2"
	local value="$3"
	local path
	
	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -E "^$name=.*" $file>/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		/bin/sed -e "s|^$name=.*|$name=\"$value\"|" < ${file} > ${file}.$$
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		echo "$name=\"$value\"" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
	fi
}

# Adds value to variable NAME
# in config file. If NAME is found, value gets added,
# otherwise it is added to the end of file.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function add_param()
{
	local file=$1
	local name=$2
	local value=$3
	local path
	
	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -qe "^$name=" $file >/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || \
			error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		/bin/sed -e "s|^$name=\"\(.*\)\"|$name=\"\1 $value \"|" < ${file} > ${file}.$$
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		echo "$name=\"$value\"" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
	fi
}

function del_param()
{
	local file=$1
	local name=$2
	local value=$3
	local path
	
	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -qe "^$name=" $file >/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || \
			error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		if [ -z "${value}" ]; then
			/bin/sed -e "/^${name}=.*/d" < ${file} > ${file}.$$
		else
			sed -e "s|^${name}=\(.*\)${value}\(.*\)|${name}=\1\2|" <${file} > ${file}.$$
		fi
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	fi
}

# Puts line
# NAME value
# to config file. If NAME is found, line gets replaced,
# otherwise it is added to the end of file.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function put_param2()
{
	local file="$1"
	local name="$2"
	local value="$3"
	local path;

	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -E "^\<$name\>" $file>/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		/bin/sed -e "s|^\<$name\>.*|$name $value|" < ${file} > ${file}.$$
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		echo "$name $value" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
	fi
}

# Puts line
# NAME=( value )
# to config file. If NAME is found, line gets replaced,
# otherwise it is added to the end of file.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function put_param3() {
	local file=$1
	local name=$2
	local value=$3
	local path
	
	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -E "^$name=\(.*\)" $file>/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		if [ -z "${value}" ]; then
			/bin/sed -e "s|^$name=\(.*\)|$name=\( \)|" < ${file} > ${file}.$$
		else
			/bin/sed -e "s|^$name=\(.*\)|$name=\( \"$value\" \)|" < ${file} > ${file}.$$
		fi
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		if [ -z "${value}" ]; then
			echo "$name=( )" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		else
			echo "$name=( \"$value\" )" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
	fi
}

# Adds value to array NAME
# in config file. If NAME is found, value gets added,
# otherwise it is added to the end of file.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function add_param3() {
	local file=$1
	local name=$2
	local value=$3
	local path
	
	path=${file%/*}
	if [ ! -d "${path}" ]; then
		 mkdir -p ${path} || error "Unable to create dir ${path}" $VZ_FS_NO_DISK_SPACE
	fi
	if grep -E "^$name=\(.*\)" $file>/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		/bin/sed -r "s|^$name=\((.*)\)|$name=\( \1 \"$value\" \)|" < ${file} > ${file}.$$
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		echo "$name=( \"$value\" )" >> $file || error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
	fi
}

# Removes value from array NAME
# in config file. If NAME is found, value gets removed,
# otherwise this is a noop function.
# Parameters:
# $1 - config file
# $2 - NAME
# $3 - value
function del_param3() {
	local file=$1
	local name=$2
	local value=$3
	
	[ ! -f $file ] && return
	
	if grep -E "^$name=\(.*\)" $file>/dev/null 2>&1; then
		${CP} ${file} ${file}.$$ || error "Can't copy file $file" $VZ_FS_NO_DISK_SPACE
		/bin/sed -r "s|^($name=\( .*)\"$value\"(.* \))|\1\2|" < ${file} > ${file}.$$
		if [ $? -ne 0 ]; then
			rm -f ${file}.$$ 2>/dev/null 
			error "Can't change file $file" $VZ_FS_NO_DISK_SPACE
		fi
		mv -f ${file}.$$ ${file}
	else
		return
	fi
}

function remove_debian_interface()
{
	local dev="$1"
	local cfg="$2"
	
	${CP} ${cfg} ${cfg}.$$ || \
		error "Can't copy file ${cfg}" $VZ_FS_NO_DISK_SPACE

	awk '
		NF == 0 {next}
		$1 == "auto" && $2 ~/'${dev}'$/ {next}
		$1 == "iface" && $2 ~/'${dev}'$/ {skip = 1; next}
		/^\t/ && skip {next}
		{skip = 0; print}
	' < ${cfg} > ${cfg}.$$ && mv -f ${cfg}.$$ ${cfg}

	rm -f ${cfg}.$$ 2>/dev/null
}

function remove_fake_old_route()
{
	local file="$1"

	[ -f "${file}" ] || return 0
	if ! grep -qE '191.255.255.[0-1]' $file; then
		return 0
	fi
	sed '/191.255.255.[0-1]/d' < ${file} > ${file}.$$ && \
		mv -f ${file}.$$ ${file}
	rm -f ${file}.$$ 2>/dev/null
}