#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2013-2016, CISOfy
#
# Website  : https://cisofy.com
# Blog     : http://linux-audit.com
# GitHub   : https://github.com/CISOfy/lynis
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Memory and processes
#
#################################################################################
#
    InsertSection "${SECTION_MEMORY_AND_PROCESSES}"
#
#################################################################################
#
    # Test        : PROC-3602
    # Description : Query /proc/meminfo
    Register --test-no PROC-3602 --os Linux --weight L --network NO --category security --description "Checking /proc/meminfo for memory details"
    if [ ${SKIPTEST} -eq 0 ]; then
        if [ -f /proc/meminfo ]; then
            LogText "Result: found /proc/meminfo"
            Display --indent 2 --text "- Checking /proc/meminfo" --result "${STATUS_FOUND}" --color GREEN
            FIND=`${AWKBINARY} '/^MemTotal/ { print $2, $3 }' /proc/meminfo`
            MEMORY_SIZE=`echo ${FIND} | ${AWKBINARY} '{ print $1 }'`
            MEMORY_UNITS=`echo ${FIND} | ${AWKBINARY} '{ print $2 }'`
            LogText "Result: Found ${MEMORY_SIZE} ${MEMORY_UNITS} memory"
            Report "memory_size=${MEMORY_SIZE}"
            Report "memory_units=${MEMORY_UNITS}"
          else
            LogText "Result: /proc/meminfo file not found on this system"
        fi
    fi
#
#################################################################################
#
    # Test        : PROC-3604
    # Description : Query /proc/meminfo
    Register --test-no PROC-3604 --os Solaris --weight L --network NO --category security --description "Query prtconf for memory details"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Searching /usr/sbin/prtconf"
        if [ -x /usr/sbin/prtconf ]; then
            Display --indent 2 --text "- Querying prtconf for installed memory" --result "${STATUS_DONE}" --color GREEN
            MEMORY_SIZE=`/usr/sbin/prtconf | ${GREPBINARY} "^Memory size:" | cut -d ' ' -f3`
            MEMORY_UNITS=`/usr/sbin/prtconf | ${GREPBINARY} "^Memory size:" | cut -d ' ' -f4`
            LogText "Result: Found ${MEMORY_SIZE} ${MEMORY_UNITS} memory"
            Report "memory_size=${MEMORY_SIZE}"
            Report "memory_units=${MEMORY_UNITS}"
          else
            Display --indent 2 --text "- Querying prtconf for installed memory" --result "${STATUS_SKIPPED}" --color WHITE
            LogText "Result: /usr/sbin/prtconf not found"
        fi
    fi
#
#################################################################################
#
    # Test        : PROC-3612
    # Description : Searching for dead and zombie processes
    # Notes       : Don't perform test on Solaris
    if [ ! "${OS}" = "Solaris" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no PROC-3612 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check dead or zombie processes"
    if [ ${SKIPTEST} -eq 0 ]; then
        if [ "${OS}" = "AIX" ]; then
            FIND=`${PSBINARY} -Ae -o pid,stat,comm | ${AWKBINARY} '{ if ($2 ~ /Z|X/) print $1 }' | xargs`
          else
            FIND=`${PSBINARY} x -o pid,stat,comm | ${AWKBINARY} '{ if ($2 ~ /Z|X/) print $1 }' | xargs`
        fi
        if [ "${FIND}" = "" ]; then
            LogText "Result: no zombie processes found"
            Display --indent 2 --text "- Searching for dead/zombie processes" --result "${STATUS_OK}" --color GREEN
          else
            LogText "Result: found one or more dead or zombie processes"
            LogText "Output: PIDs ${FIND}"
            Display --indent 2 --text "- Searching for dead/zombie processes" --result "${STATUS_WARNING}" --color RED
            ReportSuggestion ${TEST_NO} "Check the output of ps for dead or zombie processes"
        fi
    fi
#
#################################################################################
#
    # Test        : PROC-3614
    # Description : Searching for heavy IO based waiting processes
    # Notes       : Don't perform test on Solaris
    if [ ! "${OS}" = "Solaris" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no PROC-3614 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check heavy IO waiting based processes"
    if [ ${SKIPTEST} -eq 0 ]; then
        if [ "${OS}" = "AIX" ]; then
            FIND=`${PSBINARY} -Ae -o pid,stat,comm | ${AWKBINARY} '{ if ($2=="D") print $1 }' | xargs`
          else
            FIND=`${PSBINARY} x -o pid,stat,comm | ${AWKBINARY} '{ if ($2=="D") print $1 }' | xargs`
        fi
        if [ "${FIND}" = "" ]; then
            LogText "Result: No processes were waiting for IO requests to be handled first"
            Display --indent 2 --text "- Searching for IO waiting processes" --result "${STATUS_OK}" --color GREEN
          else
            LogText "Result: found one or more processes which were waiting to get IO requests handled first"
            LogText "More info: processes which show up with the status flag 'D' are often stuck, until a disk IO event finished. This can happen for example with network storage, where the connection or protocol settings are not logtext well configured."
            LogText "Output: PIDs ${FIND}"
            Display --indent 2 --text "- Searching for IO waiting processes" --result "${STATUS_WARNING}" --color RED
            ReportSuggestion ${TEST_NO} "Check process listing for processes waiting for IO requests"
        fi
    fi
#
#################################################################################
#

WaitForKeyPress

#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com