Goals
To nish program 4 by including and processing long options.
Getopt_long()
Instructions
Write a program to parse the command line for DiskSweeper.
Add to your Params class. Members of the class should include:
A bool variable for the debug option and an int for the optional level number. A bool variable for the verbose option.
De ne a controller class named Sweeper. Members of the class should include:
An Params object.
A constructor that accepts argc and argv from main. This constructor must parse the com-mand line and initialize the Params object.
Anything else you need. You will be adding members to this class each week.
A run() function: Declare an instance of Params and pass argc and argv to its constructor. When construction is nished, call Params::print() to display the params.
In your main function:
Call banner() from tools.cpp. Create a Sweeper object.
Call its run function. Nothing else.
Using getopt_long() to Decode Command-line Arguments
You still need nearly all of what you wrote for Program 4a. Here are the changes. For more guidance, refer to options2.c
The call has two more parameters:
int = getopt_long( int argc, char* argv[], const char* opts, struct option longOpts[], int*);
You must pick up and process any additional options and arguments.
Program 4b: getopt_long() CSCI 4547 / 6647 Systems Programming 2
You need to define a long options table. Example:
struct option longOpts[] = {
{ "verbose",
no_argument,
NULL,
’b’ },
{ "output",
required_argument, NULL,
’o’ },
{ "recursive",
no_argument,
NULL,
’R’ },
{ "debug",
optional_argument, NULL,
0
},
{ NULL,
0,
NULL,
0
}
};
Add this statement to your switch to process long options (such as debug) that do not have corresponding short options.
case 0: { // Convert code for long switch to full name.
outputLong(longOpts[code].name, optarg);
break;
};
