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// Copyright (c) 2106 Klemens D. Morgenstern
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PROCESS_DETAIL_POSIX_IS_RUNNING_HPP
#define BOOST_PROCESS_DETAIL_POSIX_IS_RUNNING_HPP
#include <boost/process/detail/config.hpp>
#include <boost/process/detail/posix/child_handle.hpp>
#include <system_error>
#include <sys/wait.h>
namespace boost { namespace process { namespace detail { namespace posix {
constexpr int still_active = 0x7F;
static_assert(!WIFEXITED(still_active), "Internal Error");
inline bool is_running(const child_handle &p, int & exit_code)
{
int status;
auto ret = ::waitpid(p.pid, &status, WNOHANG|WUNTRACED);
if (ret == -1)
{
if (errno != ECHILD) //because it no child is running, than this one isn't either, obviously.
::boost::process::detail::throw_last_error("is_running error");
return false;
}
else if (ret == 0)
return true;
else //exited
{
if (WIFEXITED(status))
exit_code = status;
return false;
}
}
inline bool is_running(const child_handle &p, int & exit_code, std::error_code &ec) noexcept
{
int status;
auto ret = ::waitpid(p.pid, &status, WNOHANG|WUNTRACED);
if (ret == -1)
{
if (errno != ECHILD) //because it no child is running, than this one isn't either, obviously.
ec = ::boost::process::detail::get_last_error();
return false;
}
else if (ret == 0)
return true;
else
{
ec.clear();
if (WIFEXITED(status))
exit_code = status;
return false;
}
}
inline bool is_running(int code)
{
return !WIFEXITED(code);
}
inline int eval_exit_status(int code)
{
return WEXITSTATUS(code);
}
}}}}
#endif
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