#!/usr/bin/ksh
#
#   mksysb.ksh      verifies that current mksysb images are being maintained by the two mksysb (NIM) hosts,
#                   one in the DC1 and anohter in the DC2.   The program reads the available mksysb images
#                   from both hosts along with the date they were created.   Converts the creation time into
#                   a quasi-julian calendar format for comparision the current date.   Any mksysb image less
#                   than three days old is considered "current".   Older images are considered "stale".   Any
#                   system belonging to the Unix Operation team from which a mksysb can not be found is
#                   considered "missing".   
#
# while true; do                               # end-less loop - can be removed in favor of a cron entry
Month=`date|cut -c5-7`                         # break current date - "Wed Sep 23 16:33:34 EDT 2015"
Day=`date|cut -c9-10`                          # into Month(Mmm), Day(##) & Year(##)
Year=`date|cut -c27-28`
Rom2Jul() { case $Month in Feb) Day=$(( $Day+31 ));;
                           Mar) Day=$(( $Day+59 ));;
                           Apr) Day=$(( $Day+90 ));;
                           May) Day=$(( $Day+120 ));;
                           Jun) Day=$(( $Day+151 ));;
                           Jul) Day=$(( $Day+181 ));;
                           Aug) Day=$(( $Day+212 ));;
                           Sep) Day=$(( $Day+243 ));;
                           Oct) Day=$(( $Day+273 ));;
                           Nov) Day=$(( $Day+304 ));;
                           Dec) Day=$(( $Day+334 ));; esac }
Rom2Jul
Current=$(( $Year*365+$Day-2 ))                # current ddddd less 3 days to allow for delayed backups & leap year
Path=/tmp/mksysb                             # for testing ONLY!
BackupInput=$Path/mksysbChk.input
ContactNIM=/usr/local/admin/bin/remote.pl
$ContactNIM --host=NIM1 --command=/bin/'ls -al /nim/dr/mksysb/\*'|grep -e _dr -e .tgz|cut -c37-90|cut -d" " -f2-8|cut -d_ -f1 > $BackupInput     # place DC1 clients into the list
$ContactNIM --host=NIM2 --command=/bin/'ls -al /nim/dr/mksysb/\*'|grep -e _dr -e .tgz|cut -c37-90|cut -d" " -f2-8|cut -d_ -f1 >> $BackupInput   # append DC2 clients into the list
BackupMsg=$Path/mksysbChk.msg                  # setup mail strings
BackupTitle='mksysb Status Report'
BackupAdm='xxxxx@xxxx.com'
if [[ ! -s $BackupInput ]] then BackupMsg='ERROR - unable to communicate with the NIM servers and verify mksysb status - NO notifications sent'
                                mail -s "$BackupTitle" $BackupAdm < $BackupMsg; exit; fi   # connection to NIM servers lost, aborting!!!
BackupOutput=$Path/mksysbChk.output
if [[ -e $BackupOutput ]] then rm $BackupOutput; fi
PrevHostname=''
PrevBackup=0
while read input                               # eliminate duplicate mksysbChk.files & convert raw dates into yy x 365 + ddd format
do Month=${input:0:3}
   Day=${input:4:2}
   Hostname=${input:13:12}
   Rom2Jul
   if [[ ${input:9:1} = ':' ]] then Year=`date|cut -c27-28`; else Year=${input:10:2}; fi
   Backup=$(( $Year*365+$Day ))
   if [[ $PrevHostname = '' ]] then PrevHostname=$Hostname; PrevBackup=$Backup
      else if [[ $PrevHostname != $Hostname ]] then echo $PrevBackup $PrevHostname >> $BackupOutput
                                                    PrevHostname=$Hostname; PrevBackup=$Backup
              else if (( $Backup > $PrevBackup )) then PrevBackup=$Backup; fi; fi; fi; done < $BackupInput
echo $PrevBackup $PrevHostname >> $BackupOutput   # write out final record
if [[ -e $BackupMsg ]] then rm $BackupMsg; fi
SupportedHosts=/tmp/aix.lst                    # daily extract of the supported hostnames
while read Hostname                            # match supported hostnames with mksysbChk.files & determine status (current/stale/missing)
do Backup=`grep $Hostname $BackupOutput|cut -c1-5`   # actual match
   if [[ $Backup == '' ]] then echo "$Hostname\tMissing\tmksysb" >> $BackupMsg
      else if [[ $Backup < $Current ]] then echo "$Hostname\tStale\tmksysb" >> $BackupMsg; fi; fi; done < $SupportedHosts
mail -s "$BackupTitle" $BackupAdm < $BackupMsg   # for testing ONLY!