Listing 1 SortingHat

#!/bin/ksh
# Listing 1
# SortingHat
USAGE="Usage: $(basename $0) [-h host] [-bflr] pathname"

SORTINGHAT_DIR=/opt/SortingHat
SERVERS_DIR=$SORTINGHAT_DIR/servers
DEFAULT_DIR=$SORTINGHAT_DIR/default
BACKUP_DIR=$SORTINGHAT_DIR/backup
CURRENT_DIR=$SORTINGHAT_DIR/current

HOST=""
LIST="" 
FIND="" 
BACKUP=""
current_file=""
REPLACE="FALSE"

while getopts bfh:lr option
do
    case "$option"
    in
    b)
        BACKUP="TRUE";;
    f)
        FIND="TRUE" ;;
    h)
        HOST=$OPTARG;;
    l)
        LIST="TRUE";;
    r)
        REPLACE="TRUE";;
    \?)
        exit 1;;
    esac
done

if [ "$OPTIND" -gt "$#" ]
then
    echo $USAGE
    exit 1
else
    shift $(($OPTIND-1))
    file=$1
fi

echo "\n$0..."

if [ -z "$HOST" ]
then
    HOST=$(cat /etc/nodename)
else
    echo "Host: $HOST"
fi

echo "File: $file"

HOST_DIR=$SERVERS_DIR/$HOST

if [ "$FIND" == "TRUE" ]
then
    echo "Searching for $HOST_DIR$file"
    if [ -f $HOST_DIR$file ]
    then
        echo "Found $HOST_DIR$file"
        current_file=$HOST_DIR$file
      else
        echo "Searching for $DEFAULT_DIR$file"
        if [ -f $DEFAULT_DIR$file ]
        then
            echo "Found $DEFAULT_DIR$file"
            current_file=$DEFAULT_DIR$file
        else
            echo "Searching for $file "
            if [ -f $file ]
            then
                echo "Found $file"
                current_file=$file
                  else
                echo "Searching for $BACKUP_DIR$file"
                if [ -f $BACKUP_DIR$file ]
                then
                    echo "Found $BACKUP_DIR$file"
                    current_file=$BACKUP_DIR$file
                fi
            fi
        fi
    fi

    if [ -z "$current_file" ]
    then
        echo "Did not find a current copy of $file"
        rm -f $CURRENT_DIR$file
    else
        if [ ! -d $CURRENT_DIR$(dirname $file) ]
        then
           mkdir -p $CURRENT_DIR$(dirname $file)
        fi
        cp -p $current_file $CURRENT_DIR$file
        echo "Current copy: $CURRENT_DIR$file"
    fi
fi

if [ "$BACKUP" == "TRUE" ]
then
    if [ -f $file ]
    then  
        if [ ! -d $BACKUP_DIR$(dirname $file) ]
        then
          mkdir -p $BACKUP_DIR$(dirname $file)
        fi
        backup_file=$BACKUP_DIR$file.$(date +%y%m%d.%H%M%S).$$
        cp -p $file $backup_file
        rm -f $BACKUP_DIR$file 2> /dev/null
        ln -s $backup_file $BACKUP_DIR$file
        echo "Backup copy: $BACKUP_DIR$file"
    else
        echo "No working file to back up."
    fi
fi

if [ "$REPLACE" == "TRUE" ]
then
    if [ -f "$CURRENT_DIR$file" ]
    then
        cp -p $CURRENT_DIR$file $file
        echo "Replaced $file"
    else
        echo "Current copy of $file does not exist."
    exit 1
    fi
fi

if [ "$LIST" == "TRUE" ]
then
    if [ -f "$CURRENT_DIR$file" ]
    then
        cat $CURRENT_DIR$file
    else
        echo "Current copy of $file does not exist."
    exit 1
    fi
fi

exit 0