logging output from a system command to a text file

[joshand]

hello everyone,

i am trying to put together a internet monitoring you utility using the ping command. i want to write this data to a file for archiving purposes should something interrupt my internet communication. my goal is to eventually make it a windows service.

here is what I have thus far:

#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>

using namespace std;

void wait ( int seconds );

int main() {


string command;
string q;
string ping;
string ipaddress;

// get IP ADDRESS and ping it every 3 seconds to monitor internet connectivity

cout << "please enter an ip address or hostname: ";
cin >> ipaddress;

// build command
command = "ping -n 1 " + ipaddress;

// make artificial loop
while (q != "quit") {

// open file stream
ofstream outputfile;

// open file
outputfile.open("C:\\demootext.txt");

// run command
system(command.c_str());

// add two new lines to separate output
cout << "\n\n";

// wait 3 seconds
wait (3);

// write to file
outputfile.close();

}



return 0;
}

// wait function found on cplusplus.com
void wait ( int seconds )
{
  clock_t endwait;
  endwait = clock () + seconds * CLOCKS_PER_SEC ;
  while (clock() < endwait) {}
}

any feedback will be extremely helpful!

Thank you everyone in advance.

[EricDu]

system() cannot send the output of its executed command back to its caller. popen() might be what you want.