init: fix bugs

Signed-off-by: Nxionglei6 <xionglei6@huawei.com>

services/init/init_common_service.c

@@ -262,6 +262,16 @@ static int BindCpuCore(Service *service)
     return SERVICE_SUCCESS;
 }
 
+static void ClearEnvironment(void)
+{
+    sigset_t mask;
+    sigemptyset(&mask);
+    sigaddset(&mask, SIGCHLD);
+    sigaddset(&mask, SIGTERM);
+    sigprocmask(SIG_UNBLOCK, &mask, NULL);
+    return;
+}
+
 int ServiceStart(Service *service)
 {
     INIT_ERROR_CHECK(service != NULL, return SERVICE_FAILURE, "start service failed! null ptr.");
@@ -289,6 +299,8 @@ int ServiceStart(Service *service)
             DoJobNow(service->serviceJobs.jobsName[JOB_ON_START]);
         }
 
+        (void)ClearEnvironment();
+
         if (!IsOnDemandService(service)) {
             int ret = CreateServiceSocket(service);
             INIT_ERROR_CHECK(ret >= 0, return SERVICE_FAILURE,