Hi,
What is the status of boost:process, when looking on internet you can
find different version that are more or less compatible.
Not an ideal situation and I am a bit surprised that this lib doesn't
get more love from c++ dev.
Anyway after a long time coding in easier language I decided to do a
small project under linux that consists in a tcp server running
on linux that start some process initiated by a client and sends the
output.
So I have downaloaded the most "official" version I could find here
http://www.highscore.de/boost/process/ and I tried the following code :
#include <cassert>
#include <iostream>
#include <map>
#include <string>
#include <sstream>
#include <vector>
#include
#include
#include
namespace asio = boost::asio;
namespace bp = boost::process;
using asio::ip::tcp;
bp::child start_child()
{
std::string exec = boost::process::find_executable_in_path("dpkg");
std::vectorstd::string args;
args.push_back("-l");
bp::context ctx;
ctx.stderr_behavior = bp::capture_stream();
return bp::launch(exec, args, ctx);
}
int main(int argc, char *argv[])
{
std::string value;
bp::child c = start_child();
bp::pistream &is = c.get_stderr();
std::string line;
while (std::getline(is, line))
{
value += line + "\r\n";
}
c.wait();
std::cout << "OUTPUT: " << value << std::endl;
return 0;
}
My first question is how can I merge the stderr with stdout because
some commands use stdout and some others stderr ?
My second question is : why the code above doesn't work properly and
doesn't handle the arguments I am passing ?
Indeed when I run the code I get the following output :
OUTPUT: dpkg: error: need an action option
it means that the -l is not taken in consideration.
Thanks for any help
