private void PrintUsingInformation()
{
Exit.PrintUsingInformation();
Echo.PrintUsingInformation();
Pwd.PrintUsingInformation();
Cat.PrintUsingInformation();
Wc.PrintUsingInformation();
LocalVariable.PrintUsingInformation();
Console.WriteLine("Use \"|\" for command pipelining");
SystemShell.PrintUsingInformation();
Console.WriteLine();
}
private static ICommand NewCommand(string input, Dictionary <string, string> variables, bool isFirst)
{
string[] words = input.Trim().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
if ((isFirst == false) && (words.Length != 1))
{
throw new ArgumentException("Incorrect arguments in \"" + input.Trim() + "\"");
}
List <string> arguments = new List <string>();
string command = words[0].ToLower();
for (int i = 1; i < words.Length; i++)
{
arguments.Add(words[i]);
}
if (arguments.Count > 0)
{
arguments = ToArguments(arguments, variables);
}
switch (command)
{
case "exit":
{
Exit exit = new Exit(arguments);
return(exit);
}
case "echo":
{
Echo echo = new Echo(arguments);
return(echo);
}
case "pwd":
{
Pwd pwd = new Pwd(arguments);
return(pwd);
}
case "cat":
{
Cat cat = new Cat(arguments);
return(cat);
}
case "wc":
{
Wc wc = new Wc(arguments);
return(wc);
}
default:
{
SystemShell processStart = new SystemShell(words.ToList());
return(processStart);
}
}
}