#!/usr/bin/sh
# Copyright (C) 2019 Checkmk GmbH - License: GNU General Public License v2
# This file is part of Checkmk (https://checkmk.com). It is subject to the terms and
# conditions defined in the file COPYING, which is part of this source code package.

export PATH="$PATH":/usr/sbin:/usr/bin:/usr/contrib/bin

export MK_LIBDIR="/usr/lib/check_mk_agent"
export MK_CONFDIR="/etc/check_mk"

# Optionally set a tempdir for all subsequent calls
#export TMPDIR=

# All executables in PLUGINSDIR will simply be executed and their
# ouput appended to the output of the agent. Plugins define their own
# sections and must output headers with '<<<' and '>>>'
PLUGINSDIR=$MK_LIBDIR/plugins

# All executables in LOCALDIR will by executabled and their
# output inserted into the section <<<local>>>. Please
# refer to online documentation for details about local checks.
LOCALDIR=$MK_LIBDIR/local

# close standard input (for security reasons) and stderr
if [ "$1" = -d ]; then
    set -xv
else
    exec </dev/null 2>/dev/null
fi

section_checkmk() {

    echo "<<<check_mk>>>"
    echo "Version: 2.4.0p13"
    echo "AgentOS: hpux"
    echo "Hostname: $(hostname)"
    echo "AgentDirectory: $MK_CONFDIR"
    echo "DataDirectory: $MK_VARDIR"
    echo "SpoolDirectory: $SPOOLDIR"
    echo "PluginsDirectory: $PLUGINSDIR"
    echo "LocalDirectory: $LOCALDIR"
    echo "OSType: unix"
    echo "OSName: HP-UX"
    echo "OSVersion: $(uname -r | cut -d' ' -f1)"
}

run_purely_synchronous_sections() {

    section_checkmk

    # Filesystems. HP-UX does not provide a filesystem type. We assume
    # modern systems with vxfs only here. The filesystem type is currently
    # not used by the check anyway.
    echo '<<<df>>>'
    df -kP | sed 's/ / - /' | awk '/^(.*-.*)$/ { print $0 } /^([^-]+)$/ { printf $0 }' | grep -Ev "^/proc|^Filesystem|^/aha|:"

    # Process table: HP-UX does not provide a resident size of processes.
    # We send a 0 here for RSZ.
    echo '<<<ps>>>'
    UNIX95=yes ps -ef -o user,vsz,pcpu,args | sed -e 1d -e 's/ *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) */(\1,\2,0,\3) /'

    echo '<<<hpux_cpu>>>'
    uptime
    # machinfo is unsupported addon thus not in $PATH
    /usr/contrib/bin/machinfo | grep -E 'logical proc|core' | tail -1

    # Several machine performance counters
    echo '<<<hpux_vmstat>>>'
    vmstat -s

    # Memory information
    echo '<<<hpux_mem>>>'
    machinfo | grep ^Memory
    vmstat | sed -n 3p

    # TCP connection states
    echo '<<<tcp_conn_stats>>>'
    netstat -f inet -n | awk ' /^tcp/ { c[$6]++; } END { for (x in c) { print x, c[x]; } }'

    # Network interfaces
    echo '<<<hpux_if>>>'
    for nic in $(nwmgr -g | sed -n '/^lan/s/\(^[^ ]* \).*/\1/p'); do
        nwmgr -g --st mib -c "$nic"
    done

    # Logical Volume Manager
    echo '<<<hpux_lvm:sep(58)>>>'
    /sbin/vgdisplay -v -F

    # Multipathing
    echo '<<<hpux_multipath>>>'
    scsimgr lun_map | grep -E '^[[:space:]]*(LUN PATH|State|World Wide Identifier)'

    echo '<<<hpux_serviceguard:sep(124)>>>'
    if type cmviewcl >/dev/null 2>&1; then
        cmviewcl -v -f line | grep summary
    fi

    echo '<<<ntp>>>'
    # remove heading, make first column space separated
    ntpq -np | sed -e 1,2d -e 's/^\(.\)/\1 /' -e 's/^ /%/'

    # Kernel tunnables
    if type kcusage >/dev/null 2>&1; then
        echo '<<<hpux_tunables>>>'
        kcusage -l
    fi

    # State of FC HBAs
    fcms_util=/opt/fcms/bin/fcdutil
    echo '<<<hpux_hbahealth:sep(61)>>>'
    for hba in /dev/fcd*; do
        echo "$hba"
        "${fcms_util}" "${hba}" | grep -e "Driver state" -e "Topology" -e "Dump Available" \
            -e "Code version" -e "Hardware Path" -e "Port World"
    done

    # Libelle Business Shadow
    if type trd >/dev/null 2>&1; then
        echo '<<<libelle_business_shadow:sep(58)>>>'
        trd -s
    fi
}

run_plugins() {
    (
        cd "${PLUGINSDIR}" || return
        for script in "./"*; do
            [ -x "${script}" ] && "${script}"
        done
    )
}

run_local_checks() {
    (
        cd "${LOCALDIR}" || return
        echo '<<<local:sep(0)>>>'
        for script in "./"*; do
            [ -x "${script}" ] && "${script}"
        done
    )
}

run_mrpe_plugins() {
    if [ -f "$MK_CONFDIR/mrpe.cfg" ]; then
        echo '<<<mrpe>>>'
        # SC2162: read without -r will mangle backslashes.
        # The following suppression was added when we enabled the corresponding shellcheck.
        # It may well be that "read -r" would be more appropriate.
        # shellcheck disable=SC2162
        grep -Ev '^[[:space:]]*($|#)' "$MK_CONFDIR/mrpe.cfg" |
            while read descr cmdline; do
                PLUGIN=${cmdline%% *}
                OUTPUT=$(eval "$cmdline")
                echo "(${PLUGIN##*/}) $descr $? $OUTPUT" | tr \\n \\1
                echo
            done
    fi
}

main() {

    run_purely_synchronous_sections

    run_plugins

    run_local_checks

    run_mrpe_plugins

    return 0

}

main