#!/bin/bash

######################################################################

#

#   tcar_getConfigSectionNames.sh -- This function standardizes the way

#   section names are retrieved from configuration files. Once section

#   names are retrieved they are printed to standard output for

#   further processing.

#

#   Written by: 

#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013

#

# Copyright (C) 2009-2013 The CentOS Project

#

# 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., 675 Mass Ave, Cambridge, MA 02139, USA.

#

######################################################################

function tcar_getConfigSectionNames {

    # Define absolute path to configuration file we want to retrieve

    # section names from. 

    local CONFIGURATION_FILE=${1}

    # Verify existence of configuration file.

    tcar_checkFiles -ef ${CONFIGURATION_FILE}

    # Define regular expression pattern used to retrieve section names

    # from configuration files. Don't permit any regular expression

    # meta-character either.

    local CONFIGURATION_SECTION_REGEX='^\[[[:alnum:]_.-]+\][[:space:]]*$'

    # Output all section names without brackets, one per line. Don't

    # permit any kind of expansion here. Section names are used as

    # reference to retrieve information from configuration file,

    # expanding them would create different points of verifications.

    egrep ${CONFIGURATION_SECTION_REGEX} ${CONFIGURATION_FILE} \

        | sed -r 's,\[(.+)\],\1,'

}