conntrackd: add child process infrastructure

This patch adds a simple infrastructure that allows to account
the child processes that have been forked. This also includes
a callback handler that can be registered that is called once
the child process finishes.

We can extended this later to include an alarm to limit the
maximum lifetime of a forked child process. This is good to
ensure that child processes behave timely.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/process.h b/include/process.h
new file mode 100644
index 0000000..a7f07ea
--- /dev/null
+++ b/include/process.h
@@ -0,0 +1,14 @@
+#ifndef _PROCESS_H_
+#define _PROCESS_H_
+
+struct child_process {
+	struct list_head	head;
+	int			pid;
+	void			(*cb)(void *data);
+	void			*data;
+};
+
+int fork_process_new(void (*cb)(void *data), void *data);
+int fork_process_delete(int pid);
+
+#endif