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, 4 insertions, 0 deletions

diff --git a/src/run.c b/src/run.c
index 6465699..09e2ae9 100644
--- a/src/run.c
+++ b/src/run.c
@@ -25,6 +25,7 @@
 #include "alarm.h"
 #include "fds.h"
 #include "traffic_stats.h"
+#include "process.h"
 
 #include <errno.h>
 #include <signal.h>
@@ -77,6 +78,9 @@ static void child(int foo)
 			STATE(stats).wait_failed++;
 			break;
 		}
+		/* delete process from list and run the callback */
+		fork_process_delete(ret);
+
 		if (!WIFSIGNALED(status))
 			continue;