#!/usr/bin/env ksh
#******************************************************************************
# @(#) check_aix_subsystems.sh
#******************************************************************************
# @(#) Copyright (C) 2014 by KUDOS BVBA (info@kudos.be).  All rights reserved.
#
# This program is a free software; you can redistribute it and/or modify
# it under the same 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
#******************************************************************************
#
# DOCUMENTATION (MAIN)
# -----------------------------------------------------------------------------
# @(#) MAIN: check_aix_subsystems
# DOES: see _show_usage()
# EXPECTS: see _show_usage()
# REQUIRES: data_comma2space(), init_hc(), log_hc()
#
# @(#) HISTORY:
# @(#) 2013-05-07: initial version [Patrick Van der Veken]
# @(#) 2019-01-24: arguments fix [Patrick Van der Veken]
# @(#) 2019-03-09: changed format of stanzas in configuration file &
# @(#)             added support for --log-healthy [Patrick Van der Veken]
# -----------------------------------------------------------------------------
# DO NOT CHANGE THIS FILE UNLESS YOU KNOW WHAT YOU ARE DOING!
#******************************************************************************

# -----------------------------------------------------------------------------
function check_aix_subsystems
{
# ------------------------- CONFIGURATION starts here -------------------------
typeset _CONFIG_FILE="${CONFIG_DIR}/$0.conf"
typeset _VERSION="2019-03-09"                           # YYYY-MM-DD
typeset _SUPPORTED_PLATFORMS="AIX"                      # uname -s match
# ------------------------- CONFIGURATION ends here ---------------------------

# set defaults
(( ARG_DEBUG > 0 && ARG_DEBUG_LEVEL > 0 )) && set ${DEBUG_OPTS}
init_hc "$0" "${_SUPPORTED_PLATFORMS}" "${_VERSION}"
typeset _ARGS=$(data_comma2space "$*")
typeset _ARG=""
typeset _MSG=""
typeset _STC=0
typeset _CFG_HEALTHY=""
typeset _LOG_HEALTHY=0
typeset _STATUS=""
typeset _IS_OLD_STYLE=0

# handle arguments (originally comma-separated)
for _ARG in ${_ARGS}
do
    case "${_ARG}" in
        help)
            _show_usage $0 ${_VERSION} ${_CONFIG_FILE} && return 0
            ;;
    esac
done


# handle configuration file
[[ -n "${ARG_CONFIG_FILE}" ]] && _CONFIG_FILE="${ARG_CONFIG_FILE}"
if [[ ! -r ${_CONFIG_FILE} ]]
then
    warn "unable to read configuration file at ${_CONFIG_FILE}"
    return 1
fi
_CFG_HEALTHY=$(_CONFIG_FILE="${_CONFIG_FILE}" data_get_lvalue_from_config 'log_healthy')
case "${_CFG_HEALTHY}" in
    yes|YES|Yes)
        _LOG_HEALTHY=1
        ;;
    *)
        # do not override hc_arg
        (( _LOG_HEALTHY > 0 )) || _LOG_HEALTHY=0
        ;;
esac

# check for old-style configuration file (non-prefixed stanzas)
_IS_OLD_STYLE=$(grep -c -E -e "^subsys:" ${_CONFIG_FILE} 2>/dev/null)
if (( _IS_OLD_STYLE == 0 ))
then
    warn "no 'subsys:' stanza(s) found in ${_CONFIG_FILE}; possibly an old-style configuration?"
    return 1
fi

# collect data
lssrc -a >>${HC_STDOUT_LOG} 2>>${HC_STDERR_LOG}
(( $? == 0)) || return $?

# perform check
grep -E -e "^subsys:" ${_CONFIG_FILE} 2>/dev/null  | while IFS=":" read -r _ _SUBSYS
do
    _STATUS="$(grep -E -e ${_SUBSYS} ${HC_STDOUT_LOG} 2>/dev/null)"
    case "${_STATUS}" in
        *active*)
            _MSG="${_SUBSYS} is running"
            ;;
        *inoperative*)
            _MSG="${_SUBSYS} is not running"
            _STC=1
            ;;
        *)
            _MSG="${_SUBSYS} is not on file"
            ;;
    esac

    # report result
    if (( _LOG_HEALTHY > 0 || _STC > 0 ))
    then
        log_hc "$0" ${_STC} "${_MSG}"
    fi
    _STC=0
done

return 0
}

# -----------------------------------------------------------------------------
function _show_usage
{
cat <<- EOT
NAME        : $1
VERSION     : $2
CONFIG      : $3 with parameters:
                log_healthy=<yes|no>
              and  formatted stanzas:
               subsys:<subsystem_name>
PURPOSE     : Checks whether subsystem(s) are active/operative {lssrc}
LOG HEALTHY : Supported

EOT

return 0
}

#******************************************************************************
# END of script
#******************************************************************************