An asynchronous and synchronous subprocess implementation in C++
Creation of a simple subprocess, where we want to redirect the standard output
lp::Process sp("ls -C -l --color=yes");
sp.redirectStdout(true);
sp.start();
sp.wait();
std::cout << sp.getStdout().str() << std::endl;
std::cout << "Exit code: " << sp.getStatus() << std::endl;A little more tricky ?
Creation of a subprocess, where we redirect the standard output and error output, thus, we want to call a custom lambda function each time the subprocess wrote something in the error output
lp::Process sp("ls ImAFileThatDoesNotExist");
sp.redirectStdout(true);
sp.redirectStderr(true);
sp.onReadStderr([](lp::Process &process, std::stringstream &stream)
{
std::cout << "subprocess: \"" << stream.str() << "\"" << std::endl;
//here we can clear the stream from it's content for example
stream.str().clear();
});
sp.start();
sp.wait();
std::cout << "command: \"" << sp.getCommand() << "\"" << std::endl;
std::cout << "exit code: " << sp.getStatus() << std::endl;Ah, you wanted to simulate an user input into the subprocess ? alright !
Creation of a subprocess, where we redirect the standard input
lp::Process sp("bash");
sp.redirectStdin(true);
sp.start();
sp.writeStdin("ls && cd .. && mkdir ImAnEmptyFolder && cd ImAnEmptyFolder && touch file.txt\n");
sp.writeStdin("exit\n");
sp.wait();
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