I have two switches, 'i' and 'p' that represent IPAddress and Port respectively.
What is the format of the command line?
I have tried:
app -i192.168.1.1 -p12345
app -i 192.168.1.1 -p 12345
app -i=192.168.1.1 -p=12345
app -i='192.168.1.1' -p='12345'
app --IPAddress 192.168.1.1 --Port12345
My application is having a problem with the IPAddress, and troubleshooting with DDD is unrevealing as I get for the vm.
Also, the app is running as a daemon, so my cout statements for the IP address and Port are going into oblivion, and printing to the syslog is hindered by the fact that outputting the values is not a const char*.
I plan to use program options for other things as well, but I am in over my head a bit with this.
po::options_description config("Configuration");
config.add_options()
("IPAddress,i","IP Address")
("Port,p","Port")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, config),
vm);
po::notify(vm);
//...and this is how the values are used
int retval = getaddrinfo((vm["IPAddress"].as< string >()).c_str(),(vm["Port"].as<string>()).c_str(), &hint, &list);
Here is a complete program...nothing is printed to the console after 'Values':
#include <sstream>
#include <algorithm>
#include <stdlib.h>
#include <iterator>
#include <string>
//Using boost program options to read command line and config file data
#include <boost/program_options.hpp>
using namespace std;
using namespace boost;
namespace po = boost::program_options;
int main (int argc, char *argv[])
{
po::options_description config("Configuration");
config.add_options()
("IPAddress,i","IP Address")
("Port,p","Port")
;
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, config),vm);
po::notify(vm);
cout << "Values\n";
cout << (vm["IPAddress"].as< string >()).c_str();
cout << " " << (vm["Port"].as<string>()).c_str();
return 0;
}
Are the inputted values somehow unprintable?
Here is gdb output, seems to be be cast problem:
28 string address = (vm["IPAddress"].as< string >()).c_str();
(gdb) n
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::bad_any_cast> >'
what(): boost::bad_any_cast: failed conversion using boost::any_cast
Program received signal SIGABRT, Aborted.
0x0000003afd835935 in raise () from /lib64/libc.so.6
BOOST Program options support the common command line flavours known from Unix systems. Thus those two should work (they are working for me)
app -i 192.168.1.1 -p 12345
app --IPAddress=192.168.1.1 --Port=12345
Remarks: