C / C++ / MFC

int g_iNum = 123;

void Fun1()
{
  int iTemp;
 
  iTemp = g_iNum; // Break execution at here, where is when the memory at the g_iNum's address being reads.

}

Write a program that will provide help with basic unix commands. The program should contain a loop that asks the user to input a unix command or enter quit to stop the program. Your program should recognize at least 6 of the basic unix commands like  pwd, etc.). Your program should print out the brief description of the command the user entered.  If the user enters a command that your program does not recognize, then print a message to that effect.
 
You must use the C++  string data type for your input variable.
 Hint: use the unix man command  to get the brief description for the commands you plan to put in your program. The brief description is the text that appears in the NAME section of the man page, after the command name followed by two hyphens (–). For example:

NAME
pwd -- return working  directory name 

struct sockaddr_ll sll;
struct ifreq ifr;

if ((sd = socket (PF_PACKET, SOCK_RAW, htons (0x2328))) < 0) {
    perror ("socket() failed to get socket descriptor for using ioctl() ");
    exit (EXIT_FAILURE);
}

// Use ioctl() to look up interface name and get its MAC address.
memset (&ifr, 0, sizeof (ifr));
sprintf (ifr.ifr_name, "eth1");

if (ioctl (sd, SIOCGIFINDEX, &ifr) < 0) {
    perror ("ioctl() failed");
    return (EXIT_FAILURE);
}

memset (&sll, 0, sizeof (sll));
int sll_len;
sll.sll_family  = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll_len         = sizeof(sll);

char buffer[1024];
recvfrom(sd, buffer, sizeof(buffer), 0, (struct sockaddr *)&sll, &sll_len);