diff --git a/src/logger.cpp b/src/logger.cpp
index a1305ab..00dcb55 100644
--- a/src/logger.cpp
+++ b/src/logger.cpp
@@ -1,5 +1,6 @@
 #include <string>
 #include <iostream>
+#include <thread>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -37,35 +38,9 @@ std::string getTime(int type)
 
 void writeLog(int type, std::string content, int level)
 {
-    //placeholder
-    /*
-    if(print_debug_info)
-        std::cerr<<getTime(2)<<" [DEBUG] "<<content<<"\n";
-    */
     if(level > global_log_level)
         return;
-    //std::cerr<<getTime(2)<<" ["<<getpid()<<"]";
-
-    switch(level)
-    {
-    case LOG_LEVEL_VERBOSE:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[VERB]"<<" "<<content<<"\n";
-        break;
-    case LOG_LEVEL_DEBUG:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[DEBG]"<<" "<<content<<"\n";
-        break;
-    case LOG_LEVEL_INFO:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[INFO]"<<" "<<content<<"\n";
-        break;
-    case LOG_LEVEL_WARNING:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[WARN]"<<" "<<content<<"\n";
-        break;
-    case LOG_LEVEL_ERROR:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[ERRO]"<<" "<<content<<"\n";
-        break;
-    case LOG_LEVEL_FATAL:
-        std::cerr<<getTime(2)<<" ["<<getpid()<<"]"<<"[FATL]"<<" "<<content<<"\n";
-        break;
-    }
-    //std::cerr<<" "<<content<<"\n";
+    const char *levels[] = {"[FATL]", "[ERRO]", "[WARN]", "[INFO]", "[DEBG]", "[VERB]"};
+    std::cerr<<getTime(2)<<" ["<<getpid()<<" "<<std::this_thread::get_id()<<"]"<<levels[level % 6];
+    std::cerr<<" "<<content<<"\n";
 }
diff --git a/src/main.cpp b/src/main.cpp
index c98f3be..e5f42b9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -58,11 +58,25 @@ void chkArg(int argc, char *argv[])
             update_ruleset_on_request = true;
         }
         else if(strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "--file") == 0)
-            pref_path.assign(argv[++i]);
+        {
+            if(i < argc - 1)
+                pref_path.assign(argv[++i]);
+        }
         else if(strcmp(argv[i], "-g") == 0 || strcmp(argv[i], "--gen") == 0)
+        {
             generator_mode = true;
+        }
         else if(strcmp(argv[i], "--artifact") == 0)
-            gen_profile.assign(argv[++i]);
+        {
+            if(i < argc - 1)
+                gen_profile.assign(argv[++i]);
+        }
+        else if(strcmp(argv[i], "-l") == 0 || strcmp(argv[i], "--log") == 0)
+        {
+            if(i < argc - 1)
+                if(freopen(argv[++i], "a", stderr) == NULL)
+                    std::cerr<<"Error redirecting output to file.\n";
+        }
     }
 }
 
@@ -85,6 +99,10 @@ void signal_handler(int sig)
 
 int main(int argc, char *argv[])
 {
+    if(fileExist("pref.yml"))
+        pref_path = "pref.yml";
+    chkArg(argc, argv);
+    setcd(pref_path); //then switch to pref directory
     writeLog(0, "SubConverter " VERSION " starting up..", LOG_LEVEL_INFO);
 #ifdef _WIN32
     WSADATA wsaData;
@@ -95,6 +113,7 @@ int main(int argc, char *argv[])
         return 1;
     }
     UINT origcp = GetConsoleOutputCP();
+    defer(SetConsoleOutputCP(origcp);)
     SetConsoleOutputCP(65001);
 #else
     signal(SIGPIPE, SIG_IGN);
@@ -110,23 +129,13 @@ int main(int argc, char *argv[])
     std::string prgpath = argv[0];
     setcd(prgpath); //first switch to program directory
 #endif // _DEBUG
-    if(fileExist("pref.yml"))
-        pref_path = "pref.yml";
-    chkArg(argc, argv);
-    setcd(pref_path); //then switch to pref directory
     readConf();
     if(!update_ruleset_on_request)
         refreshRulesets(rulesets, ruleset_content_array);
     generateBase();
 
     if(generator_mode)
-    {
-        int retVal = simpleGenerator();
-#ifdef _WIN32
-        SetConsoleOutputCP(origcp);
-#endif // _WIN32
-        return retVal;
-    }
+        return simpleGenerator();
 
     append_response("GET", "/", "text/plain", [](RESPONSE_CALLBACK_ARGS) -> std::string
     {
diff --git a/src/misc.h b/src/misc.h
index 08a7605..dbc002e 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -69,7 +69,7 @@ public:
     template <typename T> void define(const T &value)
     {
         if(_M_VALUE == -1)
-            set(value);
+            *this = value;
     }
 
     bool get(const bool &def_value = false)
@@ -85,12 +85,6 @@ public:
         return _M_VALUE;
     }
 
-    bool set(const tribool &value)
-    {
-        _M_VALUE = value._M_VALUE;
-        return _M_VALUE;
-    }
-
     bool set(const std::string &str)
     {
         switch(hash_(str))
@@ -185,11 +179,12 @@ template <typename T> static inline void eraseElements(T &target)
     T().swap(target);
 }
 
-template <typename T> static inline T to_number(const std::string &str, T def_value)
+template <typename T, typename U> static inline T to_number(const U &value, T def_value = T())
 {
     T retval = 0.0;
     char c;
-    std::stringstream ss(str);
+    std::stringstream ss;
+    ss << value;
     if(!(ss >> retval))
         return def_value;
     else if(ss >> c)
diff --git a/src/socket.h b/src/socket.h
index ed86f27..225cc5c 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -23,6 +23,7 @@
 #ifndef SA_INTERRUPT
 #define SA_INTERRUPT 0 //ignore this setting
 #endif
+#define SD_BOTH SHUT_RDWR
 #ifndef __hpux
 #include <sys/select.h>
 #endif /* __hpux */
diff --git a/src/subexport.cpp b/src/subexport.cpp
index 6cab035..e18d77c 100644
--- a/src/subexport.cpp
+++ b/src/subexport.cpp
@@ -991,10 +991,11 @@ void preprocessNodes(std::vector<nodeInfo> &nodes, extra_settings &ext)
 {
     std::for_each(nodes.begin(), nodes.end(), [ext](nodeInfo &x)
     {
-        x.remarks = nodeRename(x, ext.rename_array);
         if(ext.remove_emoji)
             x.remarks = trim(removeEmoji(x.remarks));
 
+        x.remarks = nodeRename(x, ext.rename_array);
+
         if(ext.add_emoji)
             x.remarks = addEmoji(x, ext.emoji_array);
     });
diff --git a/src/webserver_libevent.cpp b/src/webserver_libevent.cpp
index 2fe1d24..62b7ef7 100644
--- a/src/webserver_libevent.cpp
+++ b/src/webserver_libevent.cpp
@@ -287,6 +287,7 @@ int start_web_server_multi(void *argv)
     for (i = 0; i < nthreads; i++)
         event_base_loopbreak(base[i]); //stop the loop
 
+    shutdown(nfd, SD_BOTH); //stop accept call
     closesocket(nfd); //close listener socket
 
     return 0;