Thread: cannot get the options from the command line!

Hi

I have a pogram that reads the network address and netmask from the command line! But when i run the program. it fails! It calls the usage() function! But, when i use gdb to trace over the code, it runs properly except that it gives the whole line after "-i" as an argument....Here is the code

Code:

int main(int argc,char *argv[])
{
// Use default values?
// All the defaults are defined in "program.h"
	int useDefaults=0;	
	if (argc > 3)
		usage(argv[0],0);
	else if (argc==1)
		useDefaults=1;

// Variables	
	int n_opt;
	int i_flag=0;
	int n_flag=0;
	int p_flag=0;
	string netaddr(getNetworkAddress(getLocalIP(),DEFNETMASK));
	string netmask(DEFNETMASK);
	string portRange(DEFMINPORT "-" DEFMAXPORT);
	string s_option("hi:n:p:v");
	const option l_option[]={
	 { "help",		0, NULL, 'h'},
	 { "ip",		1, NULL, 'i'},
	 { "nm",		1, NULL, 'n'},
	 { "port",		1, NULL, 'p'},
	 { "version",	0, NULL, 'v'},
 	};
	
// Now, looking for the supplied arguments and options 
	if (!useDefaults )
	{
		do {
			n_opt=getopt_long(argc,argv,s_option.c_str(),l_option,NULL);
			switch(n_opt){
				case 'h':
					usage(argv[0],0);
					break;
				case 'i':
					netaddr=optarg;
					i_flag=1;
					break;
				case 'n':
					netmask=optarg;
					n_flag=1;
					break;
				case 'p':
					portRange=optarg;
					p_flag=1;
					break;
				case 'v':
					cout << " " << argv[0] << " version " << VERSION_INFO << "." << endl; 
					cout << " Written by fnoyan." << endl;
					exit(0);
				case -1:
					break;
				default:
					usage(argv[0],1);
			} // switch
		} while (n_opt!=-1);
	} // if (!useDefaults)
	else
	{
		cout << " No extra options are given! The default values will be used..." << endl;
		cout << " \"program -h\" for a short list of available options." << endl;		
	}
	
	cout << " program will use the values below..." << endl;
	cout << " Network IPv4 Address       : " << netaddr << endl;
	cout << " Netmask for the Network    : " << netmask << endl;
	cout << " Ports that will be scanned : " << portRange << endl;
	
// Main try block
	try 
	{ // just trying the Socket class....
		Socket s;
		s.connect("127.0.0.1",22);
	} catch (SocketException e) 
	{
		cout << e.description() << endl;
		exit(1);
	} // End of Main try block 
	
	return 0;
}

When i run the program

Code:

 $ program -i 82.122.156.32 -n 255.255.0.0

i fails and calls usage() funstion. The interesting thing here is that, i cannot get the sane result inside GDB! While running the code with GDB, (r "-i 82.122.156.32 -n 255.255.0.0"), it just gets the "82.122.156.32 -n 255.255.0.0" part as the argument of "-i".

Thanks in advice....

Don't put the command line in "" inside the debugger?
Doing the same thing from the command line would make it a single parameter as well

Ok, but what about the normal action! When i run the program from the command line, it gives me the output of usage() function. There must be something wrong in the while loop?!

> if (argc > 3)
Perhaps you meant < 3
Because your example has more than 3