Question

Using exec system call list all the files and directories of home then 

store the result in “output1.txt”. Run a second command “grep” and find 

the word “output1.txt” in all the text files of the home also place home 

path in “PATH” environment variable while doing exec for grep. This all 

will be done in one process.

Answer 1

	if (fs.peek() == EOF)
				{
					cout << "File BD empty" << endl;
					BackEvent(enter3, logos, ftr, colorF, colorW);
					cin >> enter1;
					fs.close();
				}
				else
				{
					while (!fs.eof())
					{

						data[i] = (char*)malloc(sizeof(char) * size);
						fs >> data[i] >> ch;
						if (i > 0)
						{
							ster = ch + data[i];
							data[i] = ster;
						}
						ce = ch;
						cout << data[i] << "\0" << endl;
						i++;
						if (i > 0)
						{
							data.push_back("");
						}
					}


					cin >> loaddata;


					fe.open(data[loaddata]);


					while (fe.peek() == EOF)
					{
						cout << "File " << data[i] << "empty or does not exist!" << endl;
						BackEvent(enter3, logos, ftr, colorF, colorW);
						cin >> enter1;
					}


					while (!fe.eof())
					{
						msg = "";
						getline(fe, msg);


						cout << msg << endl;

}