1 files changed, 87 insertions, 0 deletions
diff --git a/include/raul/Process.hpp b/include/raul/Process.hpp
new file mode 100644
index 0000000..717a900
--- /dev/null
+++ b/include/raul/Process.hpp
@@ -0,0 +1,87 @@
+/*
+  This file is part of Raul.
+  Copyright 2007-2015 David Robillard <http://drobilla.net>
+
+  Raul is free software: you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or any later version.
+
+  Raul 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Raul.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAUL_PROCESS_HPP
+#define RAUL_PROCESS_HPP
+
+#include "raul/Noncopyable.hpp"
+
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include <string>
+
+namespace Raul {
+
+/** A child process.
+ *
+ * \ingroup raul
+ */
+class Process : Noncopyable
+{
+public:
+	/** Launch a sub process.
+	 *
+	 * @param argv List of arguments, where argv[0] is the command name.
+	 * @return True on success.
+	 */
+	static bool launch(const char* const argv[]) {
+		// Use the same double fork() trick as JACK to prevent zombie children
+		const int child = fork();
+
+		if (child == 0) {
+			// (in child)
+
+			// Close all nonstandard file descriptors
+			struct rlimit max_fds{};
+			getrlimit(RLIMIT_NOFILE, &max_fds);
+			for (rlim_t fd = 3; fd < max_fds.rlim_cur; ++fd) {
+				close(static_cast<int>(fd));
+			}
+
+			// Fork child
+			const int grandchild = fork();
+			switch (grandchild) {
+			case 0:
+				// (in grandchild)
+				setsid();
+				execvp(argv[0], const_cast<char*const*>(argv));
+				_exit(-1);
+
+			case -1:
+				// Fork failed, there is no grandchild
+				_exit(-1);
+
+			default:
+				// Fork succeeded, return grandchild PID
+				_exit(grandchild);
+			}
+		} else if (child < 0) {
+			// Fork failed, there is no child
+			return false;
+		}
+
+		return true;
+	}
+
+private:
+	Process() = default;
+};
+
+} // namespace Raul
+
+#endif // RAUL_PROCESS_HPP