#!/bin/bash

BINDIR=/opt/omi/bin
SCRIPTDIR=${BINDIR}/support
OMISERVER=${BINDIR}/omiserver
GDB=gdb
GDB_SCRIPT="$SCRIPTDIR/gdb_allocdump"
MINIMUM_VERSION="100401000"   # version 1.4.1-0
CONFIGEDITOR=${BINDIR}/omiconfigeditor
CONF_FILE=/etc/opt/omi/conf/omiserver.conf

# Verify that the GDB script file exists
if [ ! -f ${GDB_SCRIPT} ]; then
    echo "Gdb script file ${GDB_SCRIPT} does not exist"
    exit 1
fi

# Verify that gdb exists
if [ ! -x "$(command -v ${GDB})" ]; then 
    echo "${GDB} not found in your PATH"
    exit 1
fi

# Verify sudo
EFFECTIVE_ID="$(id -u)"
SUDO=
if [ ${EFFECTIVE_ID} -ne 0 ]; then
    SUDO=sudo
    if [ ! -x "$(command -v ${SUDO})" ]; then 
        echo "${SUDO} not found in your PATH"
        exit 1
    fi
    ${SUDO} -v >&1 >/dev/null 
    if [ $? -ne 0 ]; then
        echo "You do not have access to run ${SUDO}"
        exit 1
    fi
fi

# Verify that omiserver process is running
ps -ef | fgrep ${OMISERVER} | fgrep -v fgrep 2>&1 >/dev/null
if [ $? -ne 0 ]; then
    echo "Omiserver is not running"
    exit 1
fi

# Verify that omiserver.conf is set up properly
if [ ! -f ${CONF_FILE} ]; then 
    echo "${CONF_FILE} does not exist"
    exit 1
fi
if [ ! -x ${CONFIGEDITOR} ]; then 
    echo "${CONFIGEDITOR} does not exist"
    exit 1
fi
for i in INFO DEBUG VERBOSE; do 
    ${CONFIGEDITOR} loglevel -q $i < ${CONF_FILE} 2>&1 >/dev/null; 
    [ $? -eq 0 ] && loglevel_okay=1 && break; 
done
if [ "$loglevel_okay" != "1" ]; then
    echo "Please set loglevel to INFO or higher in ${CONF_FILE}"
    exit 1
fi

# Verify that omiserver meets minimum version requirement
VERSION_LINE="$(${OMISERVER} -v)"
PRODUCT="$(echo $VERSION_LINE | awk -F" |-" '{print $2}')"
if [ ${PRODUCT} != "OMI" ]; then
    echo "Incorrect version information in omiserver -v"
    exit 1
fi
VERSION_TEMP="$(echo $VERSION_LINE | awk -F" |-" '{print $3}')"
VERSION_BUILD="$(echo $VERSION_LINE | awk -F" |-" '{print $4}')"
VERSION_MAJOR="$(echo $VERSION_TEMP | awk -F. '{print $1}')"
VERSION_MINOR="$(echo $VERSION_TEMP | awk -F. '{print $2}')"
VERSION_PATCH="$(echo $VERSION_TEMP | awk -F. '{print $3}')"
if [ ${#VERSION_MAJOR} -gt 3 \
     -o ${#VERSION_MINOR} -gt 3 \
     -o ${#VERSION_PATCH} -gt 2 \
     -o ${#VERSION_BUILD} -gt 3 ]; then
    echo "Version number exceeds maximum allowed: ${VERSION_MAJOR}:${VERSION_MINOR}:${VERSION_PATCH}:${VERSION_BUILD}"
    exit 1
fi
VERSION=$((${VERSION_MAJOR} * 100000000 + ${VERSION_MINOR} * 100000 + ${VERSION_PATCH} * 1000 + ${VERSION_BUILD}))
if [ ${VERSION} -lt ${MINIMUM_VERSION} ]; then
    echo "Minimum OMI version requirement not met:  ${VERSION_MAJOR}:${VERSION_MINOR}:${VERSION_PATCH}:${VERSION_BUILD}"
    exit 1
fi

# Verify that omiserver was built with DEBUG
echo $VERSION_LINE | fgrep DEBUG 2>&1 >/dev/null
if [ $? -ne 0 ]; then
    echo "Not running a DEBUG version of OMI"
    exit 1
fi

# Verify that omiserver has symbols
file ${OMISERVER} | fgrep "not stripped" 2>&1 >/dev/null
if [ $? -ne 0 ]; then
    echo "${OMISERVER} does not have symbols"
    exit 1
fi

# Verify that we're running on Linux
if [ "$(uname -s)" != "Linux" ]; then
    echo "Only Linux platforms records memory allocations"
    exit 1
fi

# Invoke gdb script for omiserver and omiengine
for i in omiserver omiengine
    do PROCESSID="$(ps -ef | fgrep ${BINDIR}/$i | fgrep -v fgrep | awk '{print $2}')";
    if [ ! -z "${PROCESSID}" ]; then
       echo Process id of $i is: ${PROCESSID}
       $SUDO $GDB -pid ${PROCESSID} -x ${GDB_SCRIPT} >/dev/null 2>&1
    fi;
done

exit 0