Unable to capture standard output of process using Boost.Process
Well I think that you need to redirect correctly the output stream. In my application something like this works :
[...]bp::command_line cl(_commandLine);bp::launcher l;l.set_stdout_behavior(bp::redirect_stream);l.set_stdin_behavior(bp::redirect_stream);l.set_merge_out_err(true);bp::child c = l.start(cl);bp::pistream& is = c.get_stdout();string result;string line;while (std::getline(is, line) && !_isStopped){ result += line;}c.wait();[...]Without the redirect the stdout will go nowhere if I remember correctly. It is a good practice to wait for the process end if you want to get the whole output.
EDIT:
I'm on Linux with perhaps an old version of boost.process. i realize that your code is similar to the snippet I gave you. The c.wait() might be the key ...
EDIT: Boost.process 0.1 :-)
If migrating to the "latest" boost.process isn't an issue (as you sure know, there are several variants for this library) ,you could use the following (http://www.highscore.de/boost/process0.5/)
file_descriptor_sink sink("stdout.txt");execute( run_exe("test.exe"), bind_stdout(sink));