Add daemonize() to libcommon

[lttng-tools.git] / src / common / daemonize.h

diff --git a/src/common/daemonize.h b/src/common/daemonize.h
new file mode 100644 (file)
index 0000000..345c5a5
--- /dev/null
+++ b/src/common/daemonize.h
@@ -0,0 +1,37 @@
+#ifndef LTTNG_DAEMONIZE_H
+#define LTTNG_DAEMONIZE_H
+
+/*
+ * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2014 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2 only, 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <unistd.h>
+
+/*
+ * Daemonize this process by forking and making the parent wait for the child
+ * to signal it indicating readiness. Once received, the parent successfully
+ * quits.
+ *
+ * The child process undergoes the same action that daemon(3) does meaning
+ * setsid, chdir, and dup /dev/null into 0, 1 and 2.
+ *
+ * Return 0 on success else -1 on error.
+ */
+int lttng_daemonize(pid_t *child_ppid, int *completion_flag,
+               int close_fds);
+
+#endif /* LTTNG_DAEMONIZE_H */