我發現有一個新的Boost.Process 0.5,但我不知道如何執行Windows Linux和Mac ping
或echo
。如何使用Boost.Process 0.5運行命令行/終端utils?
我得到了它在leaast在Windows上工作簡單:
#include <string>
#include <iostream>
#include <boost/asio.hpp>
#include <boost/iostreams/device/file_descriptor.hpp>
#include <boost/iostreams/stream.hpp>
#include <boost/process.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/system/error_code.hpp>
namespace bp = boost::process;
namespace bpi = boost::process::initializers;
namespace bio = boost::iostreams;
int main()
{
bp::pipe p = bp::create_pipe();
{
bio::file_descriptor_sink sink(p.sink, bio::close_handle);
boost::filesystem::path p("C:/Windows/System32/cmd.exe");
boost::system::error_code ec;
bp::execute(
bpi::run_exe(p),
bpi::set_cmd_line(L"cmd /c echo --echo-stderr hello"),
bpi::bind_stdout(sink),
bpi::set_on_error(ec)
);
}
bio::file_descriptor_source source(p.source, bio::close_handle);
bio::stream<bio::file_descriptor_source> is(source);
std::string s;
is >> s;
std::cout << s << std::endl;
std::cin.get();
return 0;
}
在Windows上正常工作,但如何使其跨平臺的工作也對Mac和Linux? (我很蠢,不知道如何編寫一個適用於任何Unix終端的路徑(或者至少對於Linux Bash和Mac默認的路徑))所以如何在Windows和Unix上使用Boost.Process 0.5運行命令行/終端utils像操作系統(最好不要每次寫入終端的路徑,而只是像echo
或ping
及其參數那樣寫應用程序)?
... prevoius版本里面找到相關的代碼:
std::string exe;
std::vector<std::string> args;
#if defined(BOOST_POSIX_API)
exe = "/bin/sh";
args.push_back("sh");
args.push_back("-c");
args.push_back(command);
#elif defined(BOOST_WINDOWS_API)
char sysdir[MAX_PATH];
UINT size = ::GetSystemDirectoryA(sysdir, sizeof(sysdir));
if (!size)
boost::throw_exception(boost::system::system_error(boost::system::error_code(::GetLastError(), boost::system::get_system_category()), "boost::process::launch_shell: GetWindowsDirectory failed"));
BOOST_ASSERT(size < MAX_PATH);
exe = std::string(sysdir) + (sysdir[size - 1] != '\\' ? "\\cmd.exe" : "cmd.exe");
args.push_back("cmd");
args.push_back("/c");
args.push_back(command);
#endif