Blame Automation/Scripts/tcar_getConfigValue.sh

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#!/bin/bash
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######################################################################
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#
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#   tcar_getConfigValue.sh -- This function standardizes the way
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#   configuration values are retrieved from configuration files. As
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#   arguments, the configuration file absolute path, the configuration
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#   section name, and the configuration option name must be provided.
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#
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#   Written by: 
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#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013
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#     Key fingerprint = D67D 0F82 4CBD 90BC 6421  DF28 7CCE 757C 17CA 3951
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#
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# Copyright (C) 2009-2013 The CentOS Project
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at
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# your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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######################################################################
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function tcar_getConfigValue {
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    # Initialize absolute path to configuration file.
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    local CONFIGURATION_FILE="${1}"
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    # Initialize configuration section name where the variable value
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    # we want to to retrieve is set in.
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    local CONFIGURATION_SECTION="${2}"
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    # Initialize variable name we want to retrieve value from.
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    local CONFIGURATION_OPTION="${3}"
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    # Retrieve configuration lines from configuration file.
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    local CONFIGURATION_LINES=$(tcar_getConfigLines \
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        "${CONFIGURATION_FILE}" "${CONFIGURATION_SECTION}" "${CONFIGURATION_OPTION}")
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    # Parse configuration lines to retrieve the values of variable
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    # names.
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    local CONFIGURATION_VALUE=$(echo ${CONFIGURATION_LINES} \
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        | cut -d= -f2- \
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        | sed -r -e 's/"//g' -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' )
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    # Output values related to variable name.
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    echo "${CONFIGURATION_VALUE}"
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}