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+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+// Copyright (c) 2016 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_POSIX_SIGNAL_HPP
+#define BOOST_PROCESS_POSIX_SIGNAL_HPP
+
+#include <boost/process/detail/posix/handler.hpp>
+#include <signal.h>
+
+namespace boost { namespace process { namespace detail { namespace posix {
+
+#if defined(__GLIBC__)
+ using sighandler_t = ::sighandler_t;
+#else
+ using sighandler_t = void(*)(int);
+#endif
+
+
+struct sig_init_ : handler_base_ext
+{
+
+ sig_init_ (sighandler_t handler) : _handler(handler) {}
+
+ template <class PosixExecutor>
+ void on_exec_setup(PosixExecutor&)
+ {
+ _old = ::signal(SIGCHLD, _handler);
+ }
+
+ template <class Executor>
+ void on_error(Executor&, const std::error_code &)
+ {
+ if (!_reset)
+ {
+ ::signal(SIGCHLD, _old);
+ _reset = true;
+ }
+ }
+
+ template <class Executor>
+ void on_success(Executor&)
+ {
+ if (!_reset)
+ {
+ ::signal(SIGCHLD, _old);
+ _reset = true;
+ }
+ }
+private:
+ bool _reset = false;
+ ::boost::process::detail::posix::sighandler_t _old{0};
+ ::boost::process::detail::posix::sighandler_t _handler{0};
+};
+
+struct sig_
+{
+ constexpr sig_() {}
+
+ sig_init_ operator()(::boost::process::detail::posix::sighandler_t h) const {return h;}
+ sig_init_ operator= (::boost::process::detail::posix::sighandler_t h) const {return h;}
+ sig_init_ dfl() const {return SIG_DFL;}
+ sig_init_ ign() const {return SIG_IGN;}
+
+};
+
+
+
+
+
+}}}}
+
+#endif