Initial work

external/process-cpp-minimal/src/core/posix/process.cpp

@@ -0,0 +1,86 @@
+/*
+ * Copyright © 2013 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authored by: Thomas Voß <thomas.voss@canonical.com>
+ */
+
+#include <core/posix/process.h>
+
+#include <core/posix/signal.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <iostream>
+
+namespace core
+{
+namespace posix
+{
+
+struct Process::Private
+{
+    pid_t pid;
+};
+
+Process Process::invalid()
+{
+    static const pid_t invalid_pid = 0;
+    Process p(invalid_pid);
+    p.d->pid = -1;
+
+    return p;
+}
+
+Process::Process(pid_t pid)
+    : Signalable(pid),
+      d(new Private{pid})
+{
+    if (pid < 0)
+        throw std::runtime_error("Cannot construct instance for invalid pid.");
+}
+
+Process::~Process() noexcept
+{
+}
+
+pid_t Process::pid() const
+{
+    return d->pid;
+}
+
+ProcessGroup Process::process_group_or_throw() const
+{
+    pid_t pgid = ::getpgid(pid());
+
+    if (pgid == -1)
+        throw std::system_error(errno, std::system_category());
+
+    return ProcessGroup(pgid);
+}
+
+ProcessGroup Process::process_group(std::error_code& se) const noexcept(true)
+{
+    pid_t pgid = ::getpgid(pid());
+
+    if (pgid == -1)
+    {
+        se = std::error_code(errno, std::system_category());
+    }
+
+    return ProcessGroup(pgid);
+}
+}
+}