#!/bin/sh
#
# latigid010@yahoo.com
# 01/06/2000
#
#  This Nagios plugin was created to check Oracle status
#

PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"
export PATH
PROGNAME=$(basename "$0")
PROGPATH=$(echo "$0" | sed -e 's,[\\/][^\\/][^\\/]*$,,')
REVISION="2.3.3"
PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"

. "$PROGPATH"/utils.sh


print_usage() {
  echo "Usage:"
  echo "  $PROGNAME --tns <Oracle Sid or Hostname/IP address>"
  echo "  $PROGNAME --db <ORACLE_SID>"
  echo "  $PROGNAME --login <ORACLE_SID>"
  echo "  $PROGNAME --connect <ORACLE_SID>"
  echo "  $PROGNAME --cache <ORACLE_SID> <USER> <PASS> <CRITICAL> <WARNING>"
  echo "  $PROGNAME --tablespace <ORACLE_SID> <USER> <PASS> <TABLESPACE> <CRITICAL> <WARNING>"
  echo "  $PROGNAME --oranames <Hostname>"
  echo "  $PROGNAME --help"
  echo "  $PROGNAME --version"
}

print_help() {
  print_revision "$PROGNAME" $REVISION
  echo ""
  print_usage
  echo ""
  echo "Check Oracle status"
  echo ""
  echo "--tns SID/IP Address"
  echo "   Check remote TNS server"
  echo "--db SID"
  echo "   Check local database (search /bin/ps for PMON process) and check"
  echo "   filesystem for sgadefORACLE_SID.dbf"
  echo "--login SID"
  echo "   Attempt a dummy login and alert if not ORA-01017: invalid username/password"
  echo "--connect SID"
  echo "   Attempt a login and alert if an ORA- error is returned"
  echo "--cache"
  echo "   Check local database for library and buffer cache hit ratios"
  echo "       --->  Requires Oracle user/password and SID specified."
  echo "       		--->  Requires select on v_$sysstat and v_$librarycache"
  echo "--tablespace"
  echo "   Check local database for tablespace capacity in ORACLE_SID"
  echo "       --->  Requires Oracle user/password specified."
  echo "       		--->  Requires select on dba_data_files and dba_free_space"
  echo "--oranames Hostname"
  echo "   Check remote Oracle Names server"
  echo "--help"
  echo "   Print this help screen"
  echo "--version"
  echo "   Print version and license information"
  echo ""
  echo "If the plugin doesn't work, check that the ORACLE_HOME environment"
  echo "variable is set, that ORACLE_HOME/bin is in your PATH, and the"
  echo "tnsnames.ora file is locatable and is properly configured."
  echo ""
  echo "When checking local database status your ORACLE_SID is case sensitive."
  echo ""
  echo "If you want to use a default Oracle home, add in your oratab file:"
  echo "*:/opt/app/oracle/product/7.3.4:N"
  echo ""
  support
}

case "$1" in
1)
    cmd='--tns'
    ;;
2)
    cmd='--db'
    ;;
*)
    cmd="$1"
    ;;
esac

# Information options
case "$cmd" in
--help)
    print_help
    exit "$STATE_OK"
    ;;
-h)
    print_help
    exit "$STATE_OK"
    ;;
--version)
    print_revision "$PROGNAME" $REVISION
    exit "$STATE_OK"
    ;;
-V)
    print_revision "$PROGNAME" $REVISION
    exit "$STATE_OK"
    ;;
esac

# Hunt down a reasonable ORACLE_HOME
if [ -z "$ORACLE_HOME" ] ; then
    # Adjust to taste
    for oratab in /var/opt/oracle/oratab /etc/oratab
    do
    [ ! -f $oratab ] && continue
    ORACLE_HOME=`IFS=:
        while read SID ORACLE_HOME junk;
        do
            if [ "$SID" = "$2" -o "$SID" = "*" ] ; then
                echo "$ORACLE_HOME";
                exit;
            fi;
        done < $oratab`
    [ -n "$ORACLE_HOME" ] && break
    done
fi
# Last resort
[ -z "$ORACLE_HOME" -a -d "$PROGPATH"/oracle ] && ORACLE_HOME=$PROGPATH/oracle

if [ "$cmd" != "--db" ]; then
    if [ -z "$ORACLE_HOME" -o ! -d "$ORACLE_HOME" ] ; then
        echo "Cannot determine ORACLE_HOME for sid $2"
        exit "$STATE_UNKNOWN"
    fi
fi
PATH=$PATH:$ORACLE_HOME/bin
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib
export ORACLE_HOME PATH LD_LIBRARY_PATH

case "$cmd" in
--tns)
    tnschk=$(tnsping "$2")
    tnschk2=$(echo "$tnschk" | grep -c OK)
    if [ "${tnschk2}" -eq 1 ] ; then 
        tnschk3=${tnschk##*(}; tnschk3=${tnschk3%)*}
        echo "OK - reply time ${tnschk3} from $2"
        exit "$STATE_OK"
    else
        echo "No TNS Listener on $2"
        exit "$STATE_CRITICAL"
    fi
    ;;
--oranames)
    namesctl status "$2" | awk '
    /Server has been running for:/ {
        msg = "OK: Up"
        for (i = 6; i <= NF; i++) {
            msg = msg " " $i
        }
        status = '"$STATE_OK"'
    }
    /error/ {
        msg = "CRITICAL: " $0
        status = '"$STATE_CRITICAL"'
    }
    END {
        print msg
        exit status
    }'
    ;;
--db)
    pmonchk=$(pgrep -f "(asm|ora|xe)_pmon_${2}$" | wc -l)
    if [ "${pmonchk}" -ge 1 ] ; then
        echo "${2} OK - ${pmonchk} PMON process(es) running"
        exit "$STATE_OK"
    #if [ -f $ORACLE_HOME/dbs/sga*${2}* ] ; then
        #if [ ${pmonchk} -eq 1 ] ; then
    #utime=`ls -la $ORACLE_HOME/dbs/sga*$2* | cut -c 43-55`
            #echo "${2} OK - running since ${utime}"
            #exit $STATE_OK
        #fi
    else
        echo "${2} Database is DOWN"
        exit "$STATE_CRITICAL"
    fi
    ;;
--login)
    loginchk=$(sqlplus dummy/user@"$2" < /dev/null)
    loginchk2=$(echo "$loginchk" | grep -c ORA-01017)
    if [ "${loginchk2}" -eq 1 ] ; then 
        echo "OK - dummy login connected"
        exit "$STATE_OK"
    else
        loginchk3=$(echo "$loginchk" | grep "ORA-" | head -1)
        echo "CRITICAL - $loginchk3"
        exit "$STATE_CRITICAL"
    fi
    ;;
--connect)
    connectchk=$(sqlplus "$2" < /dev/null)
    connectchk2=$(echo "$connectchk" | grep -c ORA-)
    if [ "${connectchk2}" -eq 0 ] ; then
        echo "OK - login successful"
        exit "$STATE_OK"
    else
        connectchk3=$(echo "$connectchk" | grep "ORA-" | head -1)
        echo "CRITICAL - $connectchk3"
        exit "$STATE_CRITICAL"
    fi
    ;;
--cache)
    if [ "${5}" -gt "${6}" ] ; then
        echo "UNKNOWN - Warning level is less then Crit"
        exit "$STATE_UNKNOWN"
    fi
    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
set pagesize 0
set numf '9999999.99'
select (1-(pr.value/(dbg.value+cg.value)))*100
from v\\$sysstat pr, v\\$sysstat dbg, v\\$sysstat cg
where pr.name='physical reads'
and dbg.name='db block gets'
and cg.name='consistent gets';
EOF`

    if echo "$result" | grep -q 'ORA-' ; then
        error=$(echo "$result" | grep "ORA-" | head -1)
        echo "CRITICAL - $error"
        exit "$STATE_CRITICAL"
    fi

    buf_hr=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}')
    buf_hrx=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}')
    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
set pagesize 0
set numf '9999999.99'
select sum(lc.pins)/(sum(lc.pins)+sum(lc.reloads))*100
from v\\$librarycache lc;
EOF`

    if echo "$result" | grep -q 'ORA-' ; then
        error=$(echo "$result" | grep "ORA-" | head -1)
        echo "CRITICAL - $error"
        exit "$STATE_CRITICAL"
    fi

    lib_hr=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}')
    lib_hrx=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}')

    if [ "$buf_hr" -le "${5}" -o "$lib_hr" -le "${5}" ] ; then
        echo "${2} CRITICAL - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
        exit "$STATE_CRITICAL"
    fi
    if [ "$buf_hr" -le "${6}" -o "$lib_hr" -le "${6}" ] ; then
        echo "${2} WARNING  - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
        exit "$STATE_WARNING"
    fi
    echo "${2} OK - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"

    exit "$STATE_OK"
    ;;
--tablespace)
    if [ "${6}" -lt "${7}" ] ; then
        echo "UNKNOWN - Warning level is more then Crit"
        exit "$STATE_UNKNOWN"
    fi
    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
set pagesize 0
set numf '9999999.99'
select NVL(b.free,0.0),a.total,100 - trunc(NVL(b.free,0.0)/a.total * 1000) / 10 prc
from (
select tablespace_name,sum(bytes)/1024/1024 total
from dba_data_files group by tablespace_name) A
LEFT OUTER JOIN
( select tablespace_name,sum(bytes)/1024/1024 free
from dba_free_space group by tablespace_name) B
ON a.tablespace_name=b.tablespace_name WHERE a.tablespace_name='${5}';
EOF`

    if echo "$result" | grep -q 'ORA-'; then
        error=$(echo "$result" | grep 'ORA-' | head -1)
        echo "CRITICAL - $error"
        exit "$STATE_CRITICAL"
    fi

    ts_free=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($1)}')
    ts_total=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($2)}')
    ts_pct=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($3)}')
    ts_pctx=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print $3}')
    if [ "$ts_free" -eq 0 -a "$ts_total" -eq 0 -a "$ts_pct" -eq 0 ] ; then
        echo "No data returned by Oracle - tablespace $5 not found?"
        exit "$STATE_UNKNOWN"
    fi
    if [ "$ts_pct" -ge "${6}" ] ; then
        echo "${2} : ${5} CRITICAL - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
        exit "$STATE_CRITICAL"
    fi
    if [ "$ts_pct" -ge "${7}" ] ; then
        echo "${2} : ${5} WARNING  - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
        exit "$STATE_WARNING"
    fi
    echo "${2} : ${5} OK - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
    exit "$STATE_OK"
    ;;
*)
    print_usage
    exit "$STATE_UNKNOWN"
esac
