Initial import from SVN

2014-03-09 10:58:52 +01:00
commit b6abce0c2f
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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
+//
+// 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_EXECUTOR_HPP
+#define BOOST_PROCESS_POSIX_EXECUTOR_HPP
+
+#include <boost/process/posix/child.hpp>
+#include <boost/fusion/algorithm/iteration/for_each.hpp>
+#include <cstdlib>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace boost { namespace process { namespace posix {
+
+struct executor
+{
+    executor() : exe(0), cmd_line(0), env(0) {}
+
+    struct call_on_fork_setup
+    {
+        executor &e_;
+
+        call_on_fork_setup(executor &e) : e_(e) {}
+
+        template <class Arg>
+        void operator()(const Arg &arg) const
+        {
+            arg.on_fork_setup(e_);
+        }
+    };
+
+    struct call_on_fork_error
+    {
+        executor &e_;
+
+        call_on_fork_error(executor &e) : e_(e) {}
+
+        template <class Arg>
+        void operator()(Arg &arg) const
+        {
+            arg.on_fork_error(e_);
+        }
+    };
+
+    struct call_on_fork_success
+    {
+        executor &e_;
+
+        call_on_fork_success(executor &e) : e_(e) {}
+
+        template <class Arg>
+        void operator()(Arg &arg) const
+        {
+            arg.on_fork_success(e_);
+        }
+    };
+
+    struct call_on_exec_setup
+    {
+        executor &e_;
+
+        call_on_exec_setup(executor &e) : e_(e) {}
+
+        template <class Arg>
+        void operator()(Arg &arg) const
+        {
+            arg.on_exec_setup(e_);
+        }
+    };
+
+    struct call_on_exec_error
+    {
+        executor &e_;
+
+        call_on_exec_error(executor &e) : e_(e) {}
+
+        template <class Arg>
+        void operator()(Arg &arg) const
+        {
+            arg.on_exec_error(e_);
+        }
+    };
+
+    template <class InitializerSequence>
+    child operator()(const InitializerSequence &seq)
+    {
+        boost::fusion::for_each(seq, call_on_fork_setup(*this));
+
+        pid_t pid = ::fork();
+        if (pid == -1)
+        {
+            boost::fusion::for_each(seq, call_on_fork_error(*this));
+        }
+        else if (pid == 0)
+        {
+            boost::fusion::for_each(seq, call_on_exec_setup(*this));
+            ::execve(exe, cmd_line, env);
+            boost::fusion::for_each(seq, call_on_exec_error(*this));
+            _exit(EXIT_FAILURE);
+        }
+
+        boost::fusion::for_each(seq, call_on_fork_success(*this));
+
+        return child(pid);
+    }
+
+    const char *exe;
+    char **cmd_line;
+    char **env;
+};
+
+}}}
+
+#endif