Bash menu

#!/bin/sh


#########################
# FILE MENU       #
#########################

fitxt() {

    clear
    echo `date`
    echo
    echo " Please make select"
    echo
    echo "        1. Display the contents of a file"
    echo "        2. Remove a file"
    echo "        3. Copy a file"
    echo "        4. List a file"
    echo "        5. Size of a file"
    echo "        6. Return to main menu"
    echo
    echo "        ENTER YOUR OPTION:"

    

}


filoop() {

    while true
    do
    fitxt
    read answer
    case $answer in
    1)
        DisplayFileContent
    ;;
    2)
        RemvFil    
    ;;
    3)
        CopFil
    ;;
    4)
        ListFil
    ;;
    5)
        SizFill
    ;;
    6)
        helploop
    ;;
    *)
        filoop
    ;;
    esac    
    done

}


DisplayFileContent() {

    clear
    echo "Please enter the full path to file and file name"
    echo
    read filename
    clear
    if [ -f $filename ]
    then
        cat $filename|more
    else
        echo "WRONG FILE NAME"
    fi    
    echo     
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil
}


RemvFil() {

    clear
    echo "Please enter the full path to file you want to delete"
    echo
    read filename
    clear
    if [ -f $filename ]
    then
            echo "Are you sure you want to delete $filename? Type (yes/no)"
        read answer
        if [ $answer = "yes" ]
        then
            rm -f $filename
            echo "FILE WAS REMOVED SUCCESSFULLY"
        fi
    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil



}


CopFil() {

    clear
    echo "Please enter full path name which you wish to copy? "
    echo
    read filename
    if [ -f $filename ]
    then
        echo "Please enter directory path where you wish to copy the file?"
        read copyto
        if [ -d $copyto ]
        then
            cp $filename $copyto
            echo "FILE WAS COPIED SUCCESSFULLY"
        else
            echo "WRONG PARAMETER: Only directory path are allowed"
        fi
    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil
}


ListFil() {

    clear
    echo "Please enter path to directory to list down files"
    echo
    read dirname
    clear
    if [ -d $dirname ]
    then
        ls -ltr $dirname|more
    else
        echo "WRONG PATH"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil


}


SizFill() {

    clear
    echo "Please enter file name to get file size"
    echo
    read filname
    clear
    if [ -f $filname ]
    then
        echo "$filname = `ls -ltr $filname| awk {'print $5'}`"
    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil

}


##############################
#     End FILE MENU    #
##############################


#################################
#    Text processing menu     #
#################################

proctxt() {
    clear
    echo `date`
    echo
    echo "        Please make your selection"
    echo
    echo "        1. Search a file for a pattern"
    echo "        2. Count lines, words, and characters in specified files"
    echo "        3. Display line differences between two files"
    echo "        4. Return to Main Menu"
    echo
    echo "    Please enter:"
}

procloop() {

    while true
    do
    proctxt
    read answer
    case $answer in
    1)
        SearchFile
    ;;
    2)
        CountLineWordsChars
    ;;
    3)
        DisLineDiff
    ;;
    4)
        helploop
    ;;
     *)
        procloop
    ;;
    esac
    done

}

SearchFile() {

    clear
    echo "Please enter file name you wish to search"
    echo
    read filname
    echo
    
    if [ -f $filname ]
    then
        echo "Please enter key word to search for?"
        read keyword
        egrep $keyword $filname|more
    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil

}


CountLineWordsChars() {

    clear
    echo "Please enter file name you wish to count words, char and lines"
    echo
    read filname
    echo
    if [ -f $filname ]
    then
        echo "Number of characters in $filname: `cat $filname|wc -m`"
        echo
        echo "Number of lines in $filname: `cat $filname|wc -l`"
        echo
        echo "Number of words in $filename: `cat $filname|wc -w`"
        echo

    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil
}


DisLineDiff() {

    clear
    echo "Please enter first file name u wish to compare"
    echo
    read filname
    echo
    if [ -f $filname ]
    then
        echo "Please enter second file you want to compare?"
        read filname2
        if [ -f $filname2 ]
        then
            diff $filname $filname2
        else
             echo "WRONG PARAMETER: Only allowed to enter file name including full path"
        fi
        
    else
        echo "WRONG PARAMETER: Only allowed to enter file name including full path"
    fi
    echo
    echo "PRESS ENTER TO GO BACK...."
    read GOBACK
    loopfil

}


#################################
#   End Text processing menu #
#################################

#################################
#      status menu          #
#################################

statxt() {
    clear
    echo `date`
    echo
    echo
    echo " Please make your selection"
    echo
    echo "     1. Display the current date and time"
    echo "     2. Current disk usage"
    echo "     3. Display process status information"
        echo
    echo "     4. Return to main menu"
    echo
    echo "     ENTER YOUR OPTION:"
}


statloop() {

  while true
    do
    statxt
    read answer
    case $answer in
    1)
        DisDateTime
    ;;
    2)
        DiskSpace
    ;;
    3)
        DisplayProcStatus
    ;;
    4)
        helploop
    ;;
    *)
        statloop
    ;;
    esac
    done
}


DisDateTime() {

    clear
    echo
    echo "        DATE:     `date '+%b %d %Y'`"
    echo
    echo "        TIME:         `date '+%H:%M '`"
    echo
    echo "PRES ANY KEY TO CONTINUE......"
    echo
    read answer
    statloop
}



DiskSpace() {

    clear
    echo
    echo "        DISK SPACE..."
    echo
    df -k
    echo
    echo
    echo "PRES ANY KEY TO RETURN BACK...."
    read answer
    loopstat


}

DisplayProcStatus() {

    clear
    echo
    echo "        List of running processes...."
    echo
    ps -ef|more
    echo
    read answer
    loopstat
}



########################
#   HELP MENU    #
########################

helptxt() {

    clear
    echo `date`
    echo
    echo
    echo "    Please make select"
    echo
    echo "        1. Help (Main Menu)"
    echo "        2. File Management Commands (Sub-Menu)"
    echo "        3. Text Processing Commands (Sub-Menu)"
    echo "        4. System Status Commands (Sub-Menu)"
    echo
    echo "        5. Exit"
    echo
    echo "        ENTER YOUR OPTION:"
}
helploop() {

    while true
    do
    helptxt
    read answer
    case $answer in
    1)
        helploop
    ;;    
    2)
        filoop
    ;;
    3)
        procloop
    ;;
    4)
        statloop    
    ;;
    5)
        exit
    ;;
    *)
        helploop
    ;;
    esac
    done
}





case "$1" in
  help)
  helploop
    ;;

  file)
      filoop
  ;;
  
  text)
  procloop
  ;;

  status)
    statloop
    ;;      

  *)
  helploop
    ;;
esac