refine log

@@ -78,7 +78,7 @@ start() {
     fi
     fi
     
     
     # check again after start server
     # check again after start server
-    sleep 0.5
+    sleep 1
     for ((i = 0; i < 5; i++)); do
     for ((i = 0; i < 5; i++)); do
         # sleep a little while, for srs may start then crash.
         # sleep a little while, for srs may start then crash.
         sleep 0.1
         sleep 0.1

@@ -243,23 +243,21 @@ void SrsFastLog::write_log(char *str_log, int size, int _level)
         printf("\033[31m%s\033[0m", str_log);
         printf("\033[31m%s\033[0m", str_log);
     }
     }
 
 
-    // if specified log file, write log to it.
-    if (!_srs_config->get_srs_log_file().empty()) {
-        if (fd < 0) {
-            std::string filename = _srs_config->get_srs_log_file();
-            
-            fd = ::open(filename.c_str(), O_RDWR | O_APPEND);
-            
-            if(fd == -1 && errno == ENOENT) {
-                fd = open(filename.c_str(), 
-                    O_RDWR | O_CREAT | O_TRUNC, 
-                    S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH
-                );
-            }
-        }
-
-        if (fd > 0) {
-            ::write(fd, str_log, size);
+    // open log file.
+    if (!_srs_config->get_srs_log_file().empty() && fd < 0) {
+        std::string filename = _srs_config->get_srs_log_file();
+        
+        fd = ::open(filename.c_str(), O_RDWR | O_APPEND);
+        
+        if(fd == -1 && errno == ENOENT) {
+            fd = open(filename.c_str(), 
+                O_RDWR | O_CREAT | O_TRUNC, 
+                S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH
+            );
         }
         }
     }
     }
+    // write log to file.
+    if (fd > 0) {
+        ::write(fd, str_log, size);
+    }
 }
 }