mastering-unix-ss/chapter27/function_manage_banks

manage_banks ()
{
# This function is used to add and delete Dirvish banks

# set -x  # Uncomment to debug this function

clear  # Clear the screen`

# Get a list of currently defined Dirvish banks
BANK_LIST=$(parse_conf)

# Display the screen header information
echo -e "\n\n\tMANAGE DIRVISH BACKUP BANKS"
echo -e "\n\nCurrently Configured Backup Bank(s):\n"

NO_BANK=0

# If this is an initial installation there will not
# be any Dirvish banks defined.

if [ -z "$BANK_LIST" ]
then
    NO_BANK=1
    echo -e "\nNo Backup Banks Have Been Defined in Dirvish\n"
else
    BANK_FILE=/tmp/backlist.out
    >$BANK_FILE
    COUNT=0

    for B in $BANK_LIST
    do
       ((COUNT == COUNT + 1))
       LAST_ENTRY=$B
       echo -e "\t$B" | tee -a $BANK_FILE
    done
fi

# Display the menu options

echo -e "\n\n1) Add a New Backup Bank"
echo -e "\n2) Delete a Current Backup Bank"
echo -e "\n3) Return to the Previous Menu"
echo -e "\n\nSelect an Option: \c"

# Read the user input
read OPT
case $OPT in
1) # Add a New Backup Bank
   echo -e "\nEnter the Bank to Add: \c"
   read A_BANK
   echo -e "\nAdding New Backup Bank: $A_BANK"
   if (( NO_BANK == 0 ))
   then
     sed "s!$LAST_ENTRY!& \n\t${A_BANK}!g" $D_CONFIG > ${D_CONFIG}.modified
     if (( $? == 0 ))
     then
        # Save the old Dirvish master config file with today's datestamp
        cp ${D_CONFIG} ${D_CONFIG}.$(date +%m%d%Y)
        cp ${D_CONFIG}.modified ${D_CONFIG}

        echo -e "\n$A_BANK Successfully Added to Dirvish Master Config File"

        # Check to see if the $A_BANK directoey exists, if not
        # ask the user if it is okay to create it.

        chk_create_dir $A_BANK
     else
        echo -e "\nERROR: Adding $A_BANK Failed...See Administrator..."
     fi
   else
     if $(grep -q "bank:" $D_CONFIG)
     then
        # NOTICE: It is important to note that sed does not "require"
        # us to use / as a field separator. Here we are using ! as a
        # sed field separator because we are working with UNIX directory
        # paths, sed gets confused using / as a field separator.

        sed "s!bank:!& \n\t${A_BANK}!g" $D_CONFIG > ${D_CONFIG}.modified

        if (( $? == 0 ))
        then
            cp ${D_CONFIG} ${D_CONFIG}.$(date +%m%d%Y)
            cp ${D_CONFIG}.modified ${D_CONFIG}
            echo -e "\n$A_BANK Successfully Added to Dirvish Master Config File"
            chk_create_dir $A_BANK
        else
            echo -e "\nERROR: Adding $A_BANK Failed...See Administrator..."
        fi
     else
        echo -e "bank:\n\t$A_BANK" >> ${D_CONFIG}.modified
        if (( $? == 0 ))
        then
           cp ${D_CONFIG} ${D_CONFIG}.$(date +%m%d%Y)
           cp ${D_CONFIG}.modified ${D_CONFIG}
           echo -e "\n$A_BANK Successfully Added to Dirvish Master Config File"
           chk_create_dir $A_BANK
        else
           echo -e "\nERROR: Adding $A_BANK Failed...See Administrator..."
        fi
     fi
   fi

   rm -f $BANK_FILE

   echo -e "\nPress Enter to Continue...\c"
   read KEY
   ;;
2) echo -e "\nEnter the Backup Bank to Remove: \c"
   read R_BANK
   if [ -d $R_BANK ]
   then
     POPULATED=$(ls $R_BANK | wc -l)
     if (( POPULATED > 0 ))
     then
        echo -e "\nWARNING: The Bank $R_BANK has the Following Backup Images:\n"
        ls $R_BANK | more
        echo -e "\nAre you Sure you Want to Remove this Bank and all of the Backup Images? (y/n): \c"
        read ANS
        case $ANS in
        y|Y) continue
             ;;
        n|N) break
             ;;
          *) echo -e "\nInvalid Input..."
             ;;
        esac
     fi
   fi
   if $(cat "$BANK_FILE" | grep -q "$R_BANK")
   then
       if (( COUNT == 1 ))
       then
           echo -e "\nWARNING: $R_BANK is the Only Backup Bank Currently Configured!"
           echo -e "\nRemoving this Bank Will Cripple Dirvish..."
       fi
       echo -e "\nAre you Sure You Want to Remove the $R_BANK Bank? (y/n): \c"
       read ANS4
       case $ANS4 in
       y|Y) cat $D_CONFIG | grep -v $R_BANK > ${D_CONFIG}.modified
            cp -p $D_CONFIG ${D_CONFIG}.bak.$(date +%m%d%y)
            cp ${D_CONFIG}.modified $D_CONFIG
            echo -e "\n$R_BANK Removed from the Dirvish Configuration File..."
            if [ -d $R_BANK ]
            then
               echo -e "\nDo You Want to Remove the $R_BANK Directory? (y/n): \c"
               read ANS
               case $ANS in
               y|Y) rm -r $R_BANK
                   if (( $? == 0 ))
                   then
                       echo -e "\n$R_BANK Directory Removed Successully"
                   else
                       echo -e "\nERROR: Remove $R_BANK Directory Failed"
                   fi
                   ;;
               n|N) echo -e "\nSkipping $R_BANK Directory Removal"
                   ;;
                 *) echo -e "\nInvalid Input..."
                   ;;
               esac
            fi
            ;;
       n|N) echo -e "\nSkipping Bank Removal\n"
            ;;
         *) echo -e "\nInvalid Entry..."
            ;;
       esac
   else
       echo -e "\nERROR: $R_BANK is Not a Valid Bank"
   fi

   echo -e "\nPress Enter to Continue...\c"
   read KEY

   ;;
3) continue
   ;;
*) echo -e "\nInvalid Entry...\n"
   ;;
esac
}