File : menu.bush
#!/usr/local/bin/bush
trace false;
declare
reply : universal_typeless := 0; -- user's reply
showMenu : boolean := true; -- true if menu is shown before prompt
directory : string := "."; -- current directory to list
begin
while true loop
if showMenu then
put_line( "Main Menu" );
new_line;
put_line( "1. ls" );
put_line( "2. ls -l" );
put_line( "3. change directory" );
put_line( "4. BUSH tracing on" );
put_line( "5. BUSH tracing off" );
put_line( "6. quit" );
new_line;
put_line( "The current directory is " & directory );
new_line;
showMenu := false;
end if;
put( "==> " );
reply := get_line;
if reply = 1 then
cd (directory) ; ls;
elsif reply = 2 then
cd (directory) ; ls -l;
elsif reply = 3 then
put( "New directory?" );
directory := get_line;
elsif reply = 4 then
trace true;
elsif reply = 5 then
trace false;
elsif reply = 6 then
exit;
else
put_line( "Please type a number between 1 and 6" );
new_line;
showMenu := true;
end if;
end loop;
put_line( "Bye!" );
end; -- script