A simple address book utility. It is assumed that the Address Book data file sataddress.dat is located in the "current" directory.

• User Guide
• Source Code
• Comments
• Address Book Record Format

User Guide

The following example assumes that the directories for both satshell and sataddress are included in the PATH environment variable.

To start the application enter:

satshell sataddress

When the application has started a screen similar to the following is displayed:

Main Address List Screen:

The toolbar has four buttons, each of which will display its function using "balloon help" when the mouse pointer is held over the button. To "select" an address for Edit or Delete, single-click anywhere on the line for the required person.

Button	Action
	Add Address screen.
	Edit Address screen. Edit selected address.
	Delete Address. Delete selected address.
	Exit the application.

To display all details held in the "Address Book" for a particular person, double-click anywhere on the line for the required person. The Address Book - Display screen is displayed.

The buttons labeled with letters can be used to limit the display range to show only names beginning with the letters shown on the button. Pressing the blue labeled "A-Z" will display all names in the Address Book. The sort order also depends on the Name Format setting. When "First,Last" Name Format is selected the names will be sorted by first name.

For example: To display all names beginning "S", "T" or "U" press the "STU" button:-

To display the names in reverse alphabetic order press the "Z-A" radio button, then the letter button for the range of names to be displayed.

For example: To display all names in reverse order, select "Z-A" Order, then press the blue "A-Z" range button:-

To change the name format to show the First Name first, press the "First,Last" radio button, then the letter button for the range of names to be displayed.

For example: To display all names in "First,Last" name format, select "First,Last" Name Format, then press the blue "A-Z" range button:-

Display Address Screen:

The toolbar has Four buttons, each of which will display its function using "balloon help" when the mouse pointer is held over the button.

Button	Action
	Back to the list of addresses.
	Edit Address screen.
	Delete Address.
	Exit the application.

Add Address Screen:

The toolbar has three buttons, each of which will display its function using "balloon help" when the mouse pointer is held over the button.

Button	Action
	Back to the list of addresses (Without saving).
	Save Address screen.
	Exit the application.

The following conditions apply when adding a new address:-

• The drop-down picklist gives a selection of titles. Only options from the list are available.
• The First and Last Names must begin with an uppercase letter (Validated).
• The First/Last name combination must be unique (Validated).
• The colon character ":" is not allowed in any fields (Validated).

Edit Address Screen:

The toolbar has three buttons, each of which will display its function using "balloon help" when the mouse pointer is held over the button.

Button	Action
	Back to the list of addresses (Without saving).
	Save Address screen.
	Exit the application.

The following conditions apply when adding a new address:-

• The drop-down picklist gives a selection of titles. Only options from the list are available.
• The First Name and Last Name fields are disabled, and cannot be edited.
• The colon character ":" is not allowed in any fields (Validated).

Delete Address Dialog

To delete the selected address press "OK". To abort the delete operation press "Cancel".

Source Code

#===========================================================#
# SCRIPT  : sataddress                                      #
# PURPOSE : Address Book application.                       #
#===========================================================#
#----------------------------------------------------------#
# Display main screen: List of names and telephone numbers #
#----------------------------------------------------------#
main() {
cat << !
newScreen {{"Address Book"} 57x23}
addToolbar {raised
   {person help(Add_Address) add}
   {pen help(Edit_Address) {edit list(0)}}
   {trash help(Delete_Address) confirm(Delete_Address?) {delete list(0)}}
   {}
   {stop help(Exit) exit}
}
addGrid {show 1,2 2 {
      {ABC DEF GHI JKL MNO PGR STU VWX YZ {A-Z blue}}
   }
   {refresh name_format order %}
}
addMultiList {list 1,4 12 {Name,30 Telephone,20} outline yscroll {display list(0)}}
addRadioButtons {Order 1,20 {+A-Z Z-A} outline title horizontal}
addRadioButtons {Name_Format 20,20 {+Last,First First,Last} outline title horizontal}
!
refresh $NameFormat $Order $Range
}

#----------------------------------------------------------------#
# Display add screen: Form to enter new name, number and address #
#----------------------------------------------------------------#
add() {
cat << !
newScreen {{"Address Book - Add"} 45x18}
addToolbar {raised
   {back help(Back) main}
   {disk help(Save_Address) validate {save title first_name last_name telephone address address2 address3}}
   {}
   {stop help(Exit) exit}
}
addLabel {label1 1,3 10 "Title" noborder}
addPickList {Title 12,3 6,4 {+Mr Mrs Miss Ms Dr}}
addEntries {1,5
   {10,30 
      {First_Name valid_name}
      {Last_Name valid_name}
      {Telephone no_colon}
      {Address no_colon}
      {!address2 no_colon}
      {!address3 no_colon}
   }
}
unlock
!
}

#--------------------------------#
# Delete selected address action #
#--------------------------------#
delete() {
if [ -z "$1" ]
then
   echo 'setMessage {"No address selected for delete" red};unlock'
   return
fi

if [ $NameFormat = "last,first" ]
then
   grep -v "^.*:$1:" sataddress.dat > sataddress.tmp.dat
else
   grep -v "^$1:" sataddress.dat > sataddress.tmp.dat
fi

mv sataddress.tmp.dat sataddress.dat
main
}

#----------------------------------------------------------#
# Display details screen: All details for selected address #
#----------------------------------------------------------#
display() {
setrecord "$1"

cat << !
newScreen {{"Address Book - Display"} 45x15}
addData {this_record "$1"}
addToolbar {raised
   {back help(Back) main}
   {pen help(Edit_Address) {edit this_record}}
   {trash help(Delete_Address) confirm(Delete_Address?) {delete this_record}}
   {}
   {stop help(Exit) exit}
}
addLabel {label1 1,2 10 "
Name

Telephone

Address"
bold
}
addLabel {label2 15,2 30 {
$Title $FirstName $LastName

$Telephone

$Address

$Address2

$Address3}
}
unlock
!
}

#----------------------------------------------------#
# Display edit screen: Form to edit selected address #
#----------------------------------------------------#
edit() {
if [ -z "$1" ]
then
   echo 'setMessage {"No address selected for edit" red};unlock'
   return
fi

setrecord "$1"

cat << !
newScreen {{"Address Book - Edit"} 45x18}
addToolbar {raised
   {back help(Back) main}
   {disk help(Save_Address) validate {update title first_name last_name telephone address address2 address3}}
   {}
   {stop help(Exit) exit}
}
addLabel {label1 1,3 10 "Title" noborder}
addPickList {Title 12,3 6,4 {Mr Mrs Miss Ms Dr}}
addEntries {1,5 
   {10,30
      -First_Name
      -Last_Name
      {Telephone no_colon}
      {Address no_colon}
      {!address2 no_colon}
      {!address3 no_colon}
   }
}
setItems {
   {title      {$Title}}
   {first_name {$FirstName}}
   {last_name  {$LastName}}
   {telephone  {$Telephone}}
   {address    {$Address}}
   {address2   {$Address2}}
   {address3   {$Address3}}
}
unlock
!
}

#---------------------------------------#
# Refresh addresses list display action #
#---------------------------------------#
refresh() {
NameFormat=$1
Order=$2
Range=$3

if [ $Order = "a-z" ]
then
   SortOrder=""
else
   SortOrder="-r"
fi
gawk -F: '
{
   if (NameFormat == "last,first")
      print $2 "\t" $6
   else
      print $1 "\t" $6
}' NameFormat=$NameFormat sataddress.dat | 
sort $SortOrder |
gawk '
BEGIN {print "setItem {list "}
/^['$Range']/ {print "{" $0 "} "}
END {print "};unlock"}'
}

#-----------------------------#
# Save address details action #
#-----------------------------#
save() {
if grep "^$2, $3:" test3.dat > /dev/null 2>&1
then
   echo 'setMessage {"Person already exists in Address Book" red};unlock'
else
   echo "$2, $3:$3, $2:$1:$2:$3:$4:$5:$6:$7" >> sataddress.dat
   main
fi
}

#-------------------------------------------------------#
# Set record function: Read record and assign variables #
#-------------------------------------------------------#
setrecord() {
if [ $NameFormat = "last,first" ]
then
   Record=`grep "^.*:$1:" sataddress.dat`
else
   Record=`grep "^$1:" sataddress.dat`
fi
Title=`echo "$Record"     | cut -f3 -d:`
FirstName=`echo "$Record" | cut -f4 -d:`
LastName=`echo "$Record"  | cut -f5 -d:`
Telephone=`echo "$Record" | cut -f6 -d:`
Address=`echo "$Record"   | cut -f7 -d:`
Address2=`echo "$Record"  | cut -f8 -d:`
Address3=`echo "$Record"  | cut -f9 -d:`
}

#-------------------------------#
# Update address details action #
#-------------------------------#
update() {
grep -v "^$2, $3:" sataddress.dat > sataddress.tmp.dat
echo "$2, $3:$3, $2:$1:$2:$3:$4:$5:$6:$7" >> sataddress.tmp.dat
mv sataddress.tmp.dat sataddress.dat
main
}

#------------#
# Initialise #
#------------#
NameFormat="last,first"
Order=a-z
Range=A-Z

[ ! -f sataddress.dat ] && touch sataddress.dat

main

echo 'addValidation {valid_name "^[A-Z][^:]*$"};addValidation {no_colon "^[^:]*$"}'

#------------#
# Main Loop  #
#------------#
while true
do
   read Command
   [ -z "$Command" ] && exit
   eval "$Command"
done

#---------------#
# End of script #
#---------------#

Comments

This application consists of eleven sections:

1. A function to display a list of names and telephone numbers held in the Address Book (main).
2. A function to display a form for entering a new address (add).
3. A function to delete a selected address from the Address Book (delete).
4. A function to display all information held in the Address Book for a selected address (display).
5. A function to display a form for editing a selected address (edit).
6. A function to refresh the names/number (main) screen (refresh).
7. A function to save a new address in the Address Book (save).
8. A function to set an Address Book record into variables (setrecord).
9. A function to save an edited address in the Address Book (update).
10. Code to initialise the application and display the names/number (main) screen (Initialise).
11. Code to read and run Action commands (Main Loop).

main - Displays a list of all names and telephone numbers in a scrollable multi-column list.

main() {

Define the main function.

cat << !

A shell script "here" document is used to write SAT/DL commands to Standard Output. This will be read and interpreted by SATSHELL.

newScreen {{"Address Book"} 57x23}

Clear the screen/message line, set the application screen size to 57 characters by 23 rows, and set the window title to "Address Book".

addToolbar {raised
   {person help(Add_Address) add}
   {pen help(Edit_Address) {edit list(0)}}
   {trash help(Delete_Address) confirm(Delete_Address?) {delete list(0)}}
   {}
   {stop help(Exit) exit}
}

Add a toolbar with a raised style at the top of the application window (row 0). The toolbar has four buttons: "Add" (With person icon, "Add Address" balloon help, runs the add function). "Edit" (With pen icon, "Edit Address" balloon help, runs the edit function using the first column (list(0)) of the selected address). "Delete" (With trash icon, "Delete Address" balloon help, runs the delete function using the first column (list(0)) of the selected address, displays a "Delete Address?" confirmation dialog). "Exit" (With stop icon, "Exit" balloon help, exit the application). The empty button definition ({}) creates a space in the toolbar.

addGrid {show 1,2 2 {
      {ABC DEF GHI JKL MNO PGR STU VWX YZ {A-Z blue}}
   }
   {refresh name_format order %}
}

Add a grid of buttons with its top left corner at column 1, row 2. Each grid cell has width 2. The grid has a single row. Each cell contains a button labeled ABC, DEF ... A-Z. The A-Z button has blue text. When a button is pressed the refresh function is run using the values of the name_format and order radio buttons and the label text of the button (%).

addMultiList {list 1,4 12 {Name,30 Telephone,20} outline yscroll {display list(0)}}

Add a multi-column list box called list with its top left corner at column 1, row 4 which is 12 lines deep. The list box has two columns: "Name" (30 characters) and "Telephone" (20 characters). When an address is selected by double-click, the display function is run with the first column (list(0)) of the selected list line being passed as a parameter. The list box has an outline and a vertical scrollbar (yscroll).

addRadioButtons {Order 1,20 {+A-Z Z-A} outline title horizontal}

Add a group of radio buttons called Order with its top left corner at column 1, row 20. The group has two buttons: A-Z and Z-A. The "+" prefix causes the A-Z button to be activated. The radiobuttons have an outline and the title option is set, which displays the name of the radio buttons (Order) overlayed at its top left. The radio buttons are displayed horizontal (The default is vertical).

addRadioButtons {Name_Format 20,20 {+Last,First First,Last} outline title horizontal}

Add a group of radio buttons called Name_Format with its top left corner at column 20, row 20. The group has two buttons: Last,First and First,Last. The "+" prefix causes the Last,First button to be activated. The radiobuttons have an outline and the title option is set, which displays the name of the radio buttons ("Name Format") overlayed at its top left. The radio buttons are displayed horizontal (The default is vertical).

!

End the "here" document.

refresh $NameFormat $Order $Range

Run the refresh function (to populate the address list) using the values of the NameFormat, Order and Range variables.

}

End the function definition.

add - Display form for entering new address.

add() {

newScreen {{"Address Book - Add"} 45x18}

Clear the screen/message line, set the application screen size to 45 characters by 18 rows, and set the window title to "Address Book - Add".

addToolbar {raised
   {back help(Back) main}
   {disk help(Save_Address) validate {save title first_name last_name telephone address address2 address3}}
   {}
   {stop help(Exit) exit}
}

Add a toolbar with a raised style at the top of the application window (row 0). The toolbar has three buttons: "Back" (With back icon, "Back" balloon help, runs the main function). "Save" (With disk icon, "Save Address" balloon help, validates all entry fields, runs the save function using the values of the title, first_name, last_name, telephone, address, address2 and address3 entry fields). "Exit" (With stop icon, "Exit" balloon help, exit the application). The empty button definition ({}) creates a space in the toolbar.

addLabel {label1 1,3 10 "Title" noborder}

Add a label called label1 with its top left corner at column 1, row 3 and a width of 10 characters. The label will display the text "Title". By default a label has some padding around it to allow for a titled border. The noborder removes the padding so that it lines up properly with the entry field labels.

addPickList {title 12,3 6,4 {+Mr Mrs Miss Ms Dr}}

Add a pick list called title with its top left corner at column 12, row 3. The pick list display is 6 characters wide and will display a drop down list showing 4 lines, with Mr, Mrs, Miss, Ms, and Dr options. As there are more options than display lines a scrollbar will automatically be added. The "+" prefix causes the Mr option to be selected.

addEntries {1,5
   {10,30 
      {First_Name valid_name}
      {Last_Name valid_name}
      {Telephone no_colon}
      {Address no_colon}
      {!address2 no_colon}
      {!address3 no_colon}
   }
}

Add one column of entry fields with its top left corner at column 1, row 5. All entry fields in the column have a label text width of 10 characters and an entry width of 30 characters.

The "First Name" and "Last Name" fields have a valid_name validation. The "Telephone" and "Address" labels have a no_colon validation. The "!address2" and "!address3" use the "!" prefix to supress display of the label text and also have a no_colon validation.

The validations used here are defined in the Initialise section. The validations are checked when an entry field loses focus and when the "Save" button is pressed.

unlock

The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

!

End the "here" document.

}

End the function definition.

delete - Delete a selected address from the Address Book.

NOTE: This function requires one parameter ($1): The selected address.

delete() {

if [ -z "$1" ]
then
   echo 'setMessage {"No address selected for delete" red};unlock'
   return
fi

If $1 is null display "No address selected for delete" in red text on the message line. The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

if [ $NameFormat = "last,first" ]
then
   grep -v "^.*:$1:" sataddress.dat > sataddress.tmp.dat
else
   grep -v "^$1:" sataddress.dat > sataddress.tmp.dat
fi

Create a temporary file (sataddress.tmp.dat) containing all records except for the selected address. The grep pattern depends on the value of the NameFormat variable.

mv sataddress.tmp.dat sataddress.dat

Rename the temporary file to the name of the Address Book file (sataddress.dat).

main

Run the main function to display the name/number list.

}

End the function definition.

display - Display all information held in the Address Book for a selected address.

NOTE: This function requires one parameter ($1): The selected address.

display() {

setrecord "$1"

Run the setrecord function using the first parameter ($1), the name of an address, to read an Address Book record and set variables containing data from the record.

cat << !

A shell script "here" document is used to write SAT/DL commands to Standard Output. This will be read and interpreted by SATSHELL.

newScreen {{"Address Book - Display"} 45x15}

Clear the screen/message line, set the application screen size to 45 characters by 15 rows, and set the window title to "Address Book - Display".

addData {this_record "$1"}

Add a data item called this_record using the first parameter ($1). This is necessary for the toolbar "Edit" and "Delete" options because $1 contains spaces and so cannot be passed as a literal parameter value.

addToolbar {raised
   {back help(Back) main}
   {pen help(Edit_Address) {edit this_record}}
   {trash help(Delete_Address) confirm(Delete_Address?) {delete this_record}}
   {}
   {stop help(Exit) exit}
}

Add a toolbar with a raised style at the top of the application window (row 0). The toolbar has four buttons: "Back" (With back icon, "Back" balloon help, runs the main function). "Edit" (With pen icon, "Edit Address" balloon help, runs the edit function using the value of the this_record data item). "Delete" (With trash icon, "Delete Address" balloon help, runs the delete function using the value of the this_record data item, displays a "Delete Address?" confirmation dialog). "Exit" (With stop icon, "Exit" balloon help, exit the application). The empty button definition ({}) creates a space in the toolbar.

addLabel {label1 1,2 10 "
Name

Telephone

Address"
bold
}

Add a label called label1 with its top left corner at column 1, row 2 and a width of 10 characters. The label will display the text Name, Telephone and Address in bold text.

addLabel {label2 15,2 30 {
$Title $FirstName $LastName

$Telephone

$Address

$Address2

$Address3}
}

Add a label called label2 with its top left corner at column 15, row 2 and a width of 30 characters. The label will display text with the values of the Title, FirstName, LastName, Telephone, Address, Address2 and Address3 variables.

unlock

The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

!

End the "here" document.

}

End the function definition.

edit - Display a form for editing a selected address.

NOTE: This function requires one parameter ($1): The selected address.

edit() {

if [ -z "$1" ]
then
   echo 'setMessage {"No address selected for edit" red};unlock'
   return
fi

If $1 is null display "No address selected for edit" in red text on the message line. The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

setrecord "$1"

Run the setrecord function using the first parameter ($1), the name of an address, to read an Address Book record and set variables containing data from the record.

cat << !

A shell script "here" document is used to write SAT/DL commands to Standard Output. This will be read and interpreted by SATSHELL.

newScreen {{"Address Book - Edit"} 45x18}

Clear the screen/message line, set the application screen size to 45 characters by 18 rows, and set the window title to "Address Book - Edit".

addToolbar {raised
   {back help(Back) main}
   {disk help(Save_Address) validate {update title first_name last_name telephone address address2 address3}}
   {}
   {stop help(Exit) exit}
}

Add a toolbar with a raised style at the top of the application window (row 0). The toolbar has three buttons: "Back" (With back icon, "Back" balloon help, runs the main function). "Save" (With disk icon, "Save Address" balloon help, validates all entry fields, runs the save function using the values of the title, first_name, last_name, telephone, address, address2 and address3 entry fields)."Exit" (With stop icon, "Exit" balloon help, exit the application). The empty button definition ({}) creates a space in the toolbar.

addLabel {label1 1,3 10 "Title" noborder}

Add a label called label1 with its top left corner at column 1, row 3 and a width of 10 characters. The label will display the text "Title". By default a label has some padding around it to allow for a titled border. The noborder removes the padding so that it lines up properly with the entry field labels.

addPickList {Title 12,3 6,4 {Mr Mrs Miss Ms Dr}}

Add a pick list called title with its top left corner at column 12, row 3. The pick list display is 6 characters wide and will display a drop down list showing 4 lines, with Mr, Mrs, Miss, Ms, and Dr options. As there are more options than display lines a scrollbar will automatically be added.

addEntries {1,5 
   {10,30
      -First_Name
      -Last_Name
      {Telephone no_colon}
      {Address no_colon}
      {!address2 no_colon}
      {!address3 no_colon}
   }
}

Add one column of entry fields with its top left corner at column 1, row 5. All entry fields in the column have a label text width of 10 characters and an entry width of 30 characters.

The "First Name" and "Last Name" use the "-" prefix which casues them to be disabled/read-only. The "Telephone" and "Address" labels have a no_colon validation. The "!address2" and "!address3" use the "!" prefix to supress display of the label text and also have a no_colon validation.

Note: If, like the First_Name and Last_Name fields here, there are no options to specify, the braces ({}) are optional.

The validations used here are defined in the Initialise section. The validations are checked when an entry field loses focus and when the "Save" button is pressed.

setItems {
   {title      {$Title}}
   {first_name {$FirstName}}
   {last_name  {$LastName}}
   {telephone  {$Telephone}}
   {address    {$Address}}
   {address2   {$Address2}}
   {address3   {$Address3}}
}

Set the title picklist and the entry fields to the values os the Title, FirstName, LastName, Telephone, Address, Address2 and Address3 variables.

unlock

The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

!

End the "here" document.

}

End the function definition.

refresh - Refresh the names/number (main) screen.

NOTE: This function requires three parameters ($1): The name format. ($2): The sort order for the names. ($3): The range of names to be displayed.

refresh() {

NameFormat=$1
Order=$2
Range=$3

if [ $Order = "a-z" ]
then
   SortOrder=""
else
   SortOrder="-r"
fi

gawk -F: '
{
   if (NameFormat == "last,first")
      print $2 "\t" $6
   else
      print $1 "\t" $6
}' NameFormat=$NameFormat sataddress.dat | 

sort $SortOrder |

gawk '
BEGIN {print "setItem {list "}
/^['$Range']/ {print "{" $0 "} "}
END {print "};unlock"}'

Format the name/number information into a SAT/DL setItem command, selecting only records specified in the Range variable. The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

}

End the function definition.

save - Save a new address in the Address Book.

NOTE: This function requires seven parameters ($1): Title ("Mr, Mrs" etc.) ($2): First name. ($3): Last name. ($4): Telephone number ($5): First address line. ($6): Second address line. ($7): Third address line.

save() {

if grep "^$2, $3:" sataddress.dat > /dev/null 2>&1
then
   echo 'setMessage {"Person already exists in Address Book" red};unlock'
else
   echo "$2, $3:$3, $2:$1:$2:$3:$4:$5:$6:$7" >> sataddress.dat
   main
fi

If a record already exists for this name, display "Person already exists in Address Book" in red text on the message line. The unlock is required because SATSHELL "locks" the application window when an Action is triggered to prevent new Actions while the current is being processed.

If the record does not exist append a new Address Book record to sataddress.dat, and run the main function to display the name/number list.

}

End function definition.

update - Save an edited address in the Address Book.

NOTE: This function requires seven parameters ($1): Title ("Mr, Mrs" etc.) ($2): First name. ($3): Last name. ($4): Telephone number ($5): First address line. ($6): Second address line. ($7): Third address line.

update() {

grep -v "^$2, $3:" sataddress.dat > sataddress.tmp.dat

echo "$2, $3:$3, $2:$1:$2:$3:$4:$5:$6:$7" >> sataddress.tmp.dat

mv sataddress.tmp.dat sataddress.dat

main

Run the main function to display the name/number list.

}

End function definition.

setrecord - Set an Address Book record into variables.

setrecord() {

if [ $NameFormat = "last,first" ]
then
   Record=`grep "^.*:$1:" sataddress.dat`
else
   Record=`grep "^$1:" sataddress.dat`
fi

Title=`echo "$Record"     | cut -f3 -d:`
FirstName=`echo "$Record" | cut -f4 -d:`
LastName=`echo "$Record"  | cut -f5 -d:`
Telephone=`echo "$Record" | cut -f6 -d:`
Address=`echo "$Record"   | cut -f7 -d:`
Address2=`echo "$Record"  | cut -f8 -d:`
Address3=`echo "$Record"  | cut -f9 -d:`

}

"Initialise" - Initialise the application and display the names/number (main) screen.

NameFormat="last,first"
Order=a-z
Range=A-Z

[ ! -f sataddress.dat ] && touch sataddress.dat

main

Run the main function to display the name/number list.

echo 'addValidation {valid_name "^[A-Z][^:]*$"};addValidation {no_colon "^[^:]*$"}'

Add two validations: valid_name (Must begin with an uppercase letter, and must not contain a colon). no_colon (Must not contain a colon).

"Main Loop" - Read and run Action commands.

while true
do

   read Command

   [ -z "$Command" ] && exit

   eval "$Command"

done

Address Book Record Format

The Address Book data file (sataddress.dat) has the following record format:-

first_name, last_name:last_name, first_name:title:first_name:last_name:telephone:address1:address2:address3

Fred, Smith:Smith, Fred:Mr:Fred:Smith:987-6545:1 Long Drive:Townsville:Green County
Marion, Smith:Smith, Marion:Mrs:Marion:Smith:555-8907:76 High Street:Townsville:Green County
Mary, Jones:Jones, Mary:Dr:Mary:Jones:555-1234:556 Maple Road:Oakfield:Green County