common: Sign in early SIGHUP signal

Contains the following process:
ceph-mon ceph-mgr ceph-mds ceph-fuse radosgw.

Signed-off-by: huanwen ren <ren.huanwen@zte.com.cn>

src/ceph_fuse.cc

@@ -145,6 +145,9 @@ int main(int argc, const char **argv, const char *envp[]) {
 
   {
     common_init_finish(g_ceph_context);
+
+    init_async_signal_handler();
+    register_async_signal_handler(SIGHUP, sighup_handler);
 
     //cout << "child, mounting" << std::endl;
     class RemountTest : public Thread {
@@ -240,9 +243,6 @@ int main(int argc, const char **argv, const char *envp[]) {
       goto out_messenger_start_failed;
     }
 
-    init_async_signal_handler();
-    register_async_signal_handler(SIGHUP, sighup_handler);
-
     // start client
     r = client->init();
     if (r < 0) {

src/ceph_mds.cc

@@ -174,7 +174,11 @@ int main(int argc, const char **argv)
 
   global_init_daemonize(g_ceph_context);
   common_init_finish(g_ceph_context);
-
+
+  // set up signal handlers, now that we've daemonized/forked.
+  init_async_signal_handler();
+  register_async_signal_handler(SIGHUP, sighup_handler);
+
   // get monmap
   MonClient mc(g_ceph_context);
   if (mc.build_initial_monmap() < 0)
@@ -196,9 +200,6 @@ int main(int argc, const char **argv)
     goto shutdown;
   }
 
-  // set up signal handlers, now that we've daemonized/forked.
-  init_async_signal_handler();
-  register_async_signal_handler(SIGHUP, sighup_handler);
   register_async_signal_handler_oneshot(SIGINT, handle_mds_signal);
   register_async_signal_handler_oneshot(SIGTERM, handle_mds_signal);
 

src/ceph_mgr.cc

@@ -63,6 +63,9 @@ int main(int argc, const char **argv)
   global_init_daemonize(g_ceph_context);
   global_init_chdir(g_ceph_context);
   common_init_finish(g_ceph_context);
+
+  init_async_signal_handler();
+  register_async_signal_handler(SIGHUP, sighup_handler);
 
   MgrStandby mgr(argc, argv);
   int rc = mgr.init();

src/ceph_mon.cc

@@ -323,6 +323,10 @@ int main(int argc, const char **argv)
     pick_addresses(g_ceph_context, CEPH_PICK_ADDRESS_PUBLIC);
 
     common_init_finish(g_ceph_context);
+
+    // set up signal handlers, now that we've daemonized/forked.
+    init_async_signal_handler();
+    register_async_signal_handler(SIGHUP, sighup_handler);
 
     bufferlist monmapbl, osdmapbl;
     std::string error;
@@ -789,9 +793,6 @@ int main(int argc, const char **argv)
 
   mon->init();
 
-  // set up signal handlers, now that we've daemonized/forked.
-  init_async_signal_handler();
-  register_async_signal_handler(SIGHUP, sighup_handler);
   register_async_signal_handler_oneshot(SIGINT, handle_mon_signal);
   register_async_signal_handler_oneshot(SIGTERM, handle_mon_signal);
 

src/mgr/MgrStandby.cc

@@ -422,8 +422,6 @@ int MgrStandby::main(vector<const char *> args)
 {
   // Enable signal handlers
   signal_mgr = this;
-  init_async_signal_handler();
-  register_async_signal_handler(SIGHUP, sighup_handler);
   register_async_signal_handler_oneshot(SIGINT, handle_mgr_signal);
   register_async_signal_handler_oneshot(SIGTERM, handle_mgr_signal);
 

src/rgw/rgw_main.cc

@@ -287,6 +287,9 @@ int main(int argc, const char **argv)
 
   common_init_finish(g_ceph_context);
 
+  init_async_signal_handler();
+  register_async_signal_handler(SIGHUP, sighup_handler);
+
   int r = rgw_tools_init(g_ceph_context);
   if (r < 0) {
     derr << "ERROR: unable to initialize rgw tools" << dendl;
@@ -427,8 +430,6 @@ int main(int argc, const char **argv)
     exit(1);
   }
 
-  init_async_signal_handler();
-  register_async_signal_handler(SIGHUP, sighup_handler);
   register_async_signal_handler(SIGTERM, handle_sigterm);
   register_async_signal_handler(SIGINT, handle_sigterm);
   register_async_signal_handler(SIGUSR1, handle_sigterm);