netutils: make the net tools can work with signal disabled

Signed-off-by: guoshichao <guoshichao@xiaomi.com>

Author: extinguish

netutils/dhcpc/dhcpc.c

@@ -533,8 +533,16 @@ static void *dhcpc_run(void *args)
   struct dhcpc_state result;
   int ret;
 
+#ifdef CONFIG_DISABLE_SIGNALS
+  pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+  pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
+#endif
+
   while (1)
     {
+#ifdef CONFIG_DISABLE_SIGNALS
+      pthread_testcancel();
+#endif
       ret = dhcpc_request(pdhcpc, &result);
       if (ret == OK)
         {
@@ -701,7 +709,9 @@ void dhcpc_close(FAR void *handle)
 void dhcpc_cancel(FAR void *handle)
 {
   struct dhcpc_state_s *pdhcpc = (struct dhcpc_state_s *)handle;
+#ifndef CONFIG_DISABLE_SIGNALS
   sighandler_t old;
+#endif
   int ret;
 
   if (pdhcpc)
@@ -710,6 +720,9 @@ void dhcpc_cancel(FAR void *handle)
 
       if (pdhcpc->thread)
         {
+#ifdef CONFIG_DISABLE_SIGNALS
+          pthread_cancel(pdhcpc->thread);
+#else
           old = signal(SIGQUIT, SIG_IGN);
 
           /* Signal the dhcpc_run */
@@ -719,6 +732,7 @@ void dhcpc_cancel(FAR void *handle)
             {
               nerr("ERROR: pthread_kill DHCPC thread\n");
             }
+#endif
 
           /* Wait for the end of dhcpc_run */
 
@@ -729,7 +743,9 @@ void dhcpc_cancel(FAR void *handle)
             }
 
           pdhcpc->thread = 0;
+#ifndef CONFIG_DISABLE_SIGNALS
           signal(SIGQUIT, old);
+#endif
         }
     }
 }

netutils/ping/icmp_ping.c

@@ -91,6 +91,7 @@ static volatile bool g_exiting;
  * Private Functions
  ****************************************************************************/
 
+#ifndef CONFIG_DISABLE_SIGNALS
 /****************************************************************************
  * Name: sigexit
  ****************************************************************************/
@@ -99,6 +100,7 @@ static void sigexit(int signo)
 {
   g_exiting = true;
 }
+#endif
 
 /****************************************************************************
  * Name: ping_newid
@@ -199,7 +201,9 @@ void icmp_ping(FAR const struct ping_info_s *info)
   int i;
 
   g_exiting = false;
+#ifndef CONFIG_DISABLE_SIGNALS
   signal(SIGINT, sigexit);
+#endif
 
   /* Initialize result structure */
 

netutils/telnetd/telnetd_daemon.c

@@ -74,7 +74,7 @@ int telnetd_daemon(FAR const struct telnetd_config_s *config)
 #endif
   } addr;
 
-#ifdef CONFIG_SCHED_HAVE_PARENT
+#if defined(CONFIG_SCHED_HAVE_PARENT) && !defined(CONFIG_DISABLE_SIGNALS)
   struct sigaction sa;
   sigset_t blockset;
 #endif
@@ -85,7 +85,7 @@ int telnetd_daemon(FAR const struct telnetd_config_s *config)
   int optval;
 #endif
 
-#ifdef CONFIG_SCHED_HAVE_PARENT
+#if defined(CONFIG_SCHED_HAVE_PARENT) && !defined(CONFIG_DISABLE_SIGNALS)
   /* Call sigaction with the SA_NOCLDWAIT flag so that we do not transform
    * children into "zombies" when they terminate:  Child exit status will
    * not be retained.
@@ -113,7 +113,7 @@ int telnetd_daemon(FAR const struct telnetd_config_s *config)
       nerr("ERROR: sigprocmask failed: %d\n", errno);
       goto errout;
     }
-#endif /* CONFIG_SCHED_HAVE_PARENT */
+#endif /* CONFIG_SCHED_HAVE_PARENT && !CONFIG_DISABLE_SIGNALS */
 
   /* Create a new TCP socket to use to listen for connections */