ex_nfileinfo.cpp

//
//  This file is part of NUS
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation version 2.1
//  of the License.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// This example shows how to use the NFile class to manipulate files
#include "nfileinfo.h"
#include "nobject.h"
#include "nstring.h"
#include "ngetopt.h"
#include "noutput.h"

class FileInfoApp {
      public:
            FileInfoApp(void) {

            }

            bool setFile(const NOpt<FileInfoApp> &opt) {
                  m_filename = opt.getValues().at(0);
                  return true;
            }


            int run(void) {
                  NFileInfo info(m_filename);

                  
                  // Checks the file type 
                  NMessage::print() << "The file " << m_filename << 
                        (info.isFile() ? " is" : " is not") << " a file";
                  NMessage::print() << "The file " << m_filename << 
                        (info.isDir() ? " is" : " is not") << 
                        " a directory";
                  NMessage::print() << "The file " << m_filename << 
                        (info.isDevice() ? " is" : " is not") << 
                        " a device";
                  NMessage::print() << "The file " << m_filename << 
                        (info.isFifo() ? " is" : " is not") << " a fifo";
                  NMessage::print() << "The file " << m_filename << 
                        (info.isLink() ? " is" : " is not") << " a link";

                  // Checks the file permissions for read
                  NMessage::print() << "The file " << m_filename << 
                        (info.ownerRead() ? " can" : " can not") << 
                        " be read by the owner";
                  NMessage::print() << "The file " << m_filename << 
                        (info.groupRead() ? " can" : " can not") << 
                        " be read by the group";
                  NMessage::print() << "The file " << m_filename << 
                        (info.othersRead() ? " can" : " can not") << 
                        " be read by others";

                  // Checks the file permissions for writing
                  NMessage::print() << "The file " << m_filename << 
                        (info.ownerWrite() ? " can" : " can not") << 
                        " be written by the owner";
                  NMessage::print() << "The file " << m_filename << 
                        (info.groupWrite() ? " can" : " can not") << 
                        " be written by the group";
                  NMessage::print() << "The file " << m_filename << 
                        (info.othersWrite() ? " can" : " can not") << 
                        " be written by others";

                  // Checks the file permissioning for executing
                  NMessage::print() << "The file " << m_filename << 
                        (info.ownerExecute() ? " can" : " can not") << 
                        " be executed by the owner";
                  NMessage::print() << "The file " << m_filename << 
                        (info.groupExecute() ? " can" : " can not") << 
                        " be executed by the group";
                  NMessage::print() << "The file " << m_filename << 
                        (info.othersExecute() ? " can" : " can not") << 
                        " be executed by others";

                  return 0;
            }
      private:
            NString m_filename;
};

void setup_opts(NGetOpt<FileInfoApp> *opts) { 
      opts->add("h", "help", false, "Display the help for this program", NULL);
      opts->add("f", "file", true, "The file/directory to check", 
                &FileInfoApp::setFile);
}

int main(int argc, char **argv) { 
      FileInfoApp app;
      NGetOpt<FileInfoApp> opts(argc, argv, &app, 1);

      // Setup the command line flags (see NGetOpt documentation for details)
      setup_opts(&opts);
      try { 
            if (opts.proccess()) { 
                  app.run();
            }
      }
      catch (NException &e) { 
            NWarning::print() << e.getDescription();
            exit(1);          
      }

      return 0;
}

---