#! /bin/ksh

export ORACLE_SID=$1
[ ! -d "$2" ] && exit 1;
MIREP=$2

if [ ! -z $3 ];then
  RETENTION=$3
else
  RETENTION=1
fi

MIPATH=`dirname $0`
MIDATE=`date +%Y%m%d_%H%M%S`
MILOG="$MIPATH/backup_${ORACLE_SID}_${MIDATE}.log"

rman target / << EOF$ORACLE_SID |tee $MILOG
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '$MIREP/%F';
configure retention policy to recovery window of $RETENTION days;
run  {
   allocate channel c2 type disk;
   allocate channel c1 type disk;
   backup
      incremental level 0
      tag db_0
      filesperset 10
      format '$MIREP/db_0_${MIDATE}_%d_s%s_p%p'
      (database include current controlfile);
   sql 'alter system archive log current';
   backup
     filesperset 50
     format '$MIREP/arch_${MIDATE}_%d_s%s_p%p'
     archivelog all;
   delete noprompt archivelog until time 'sysdate - $RETENTION';
   release channel c2 ;
   release channel c1 ;
   sql "alter database backup controlfile to
   ''$MIREP/control_sav_${MIDATE}.ctl'' reuse";
 }
crosscheck backup;
delete noprompt obsolete;
EOF$ORACLE_SID

NBERR=`grep -c "RMAN-00569" $MILOG`
if [ $NBERR -eq 0 ];then
  for i in `find $MIREP -mtime +$RETENTION`
  do
    [ ! -d $i ] && rm $i
  done
  echo "Fin normale du backup de $ORACLE_SID" |tee -a $MILOG
else
  echo "erreur(s) detectees lors du backup de $ORACLE_SID" |tee -a $MILOG
fi
exit $NBERR