Use netlink connector to recv pid info, fix exec

For some reasons, kernel-connector can catch exec event, but it
doesn't tell me about what the process exec and what're its args.
So we should use audit to collect these infomations, and complete
in the database.

However, there's different delays between connector and audit,
although they both use netlink socket, as a result of which, exec
may comes before fork. we deal with it the same way. But, there's
also exec event lost, may because of the check for ppid in exec
event, but it's necessary, and if is deleted, too much irrelavent
infomation would flood into database, i've tried. So make it there,
just go forward.

Besides, what's newly discovered is that pthread_create also use
clone syscall, but if pid 1 has a thread 2, the exec info will say
that pid 2 execs. So i shouldn't ignore connector msg that childPid
ne childTgid.

This is my first attempt to use git-submodule function in my own pro-
ject, also golang local package. Congratulations!

Now, fight to fix about file operations. Hope that there wouldn't
be too many fucking bugs.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/global.go b/src/global.go
index f0f909c..a266b1b 100644
--- a/src/global.go
+++ b/src/global.go
@@ -33,12 +33,13 @@ type Event struct {
         timestamp    time.Time
         pid, ppid    int
         syscall      int
-        exit_code    uint64
+        syscallParam [4]uint64
+        pathName     string
         argc         int
         argv         []string
         cwd          string
-        syscallParam [4]uint64
-        pathName     string
+        exit_code    uint64
+        exit_signal  int
 }
 
 func (event Event) String() string {