diff --git a/include/common.h b/include/common.h
index 870ba1a..6f7ef33 100644
--- a/include/common.h
+++ b/include/common.h
@@ -13,6 +13,7 @@
 #define OVERTURE_BIN "overture"
 #define ADGUARD_BIN  "AdGuardHome"
 
+#define WORK_DIR "/etc/cleardns/"
 
 //extern char **adguard_command;
 //extern char **overture_command;
@@ -23,6 +24,6 @@
 
 char* show_bool(int value);
 char** command_init(char *bin);
-void save_file(char *file, char *data);
+void save_file(char *file, char *content);
 
 #endif
diff --git a/include/dnsproxy.h b/include/dnsproxy.h
index 076e00d..261db00 100644
--- a/include/dnsproxy.h
+++ b/include/dnsproxy.h
@@ -1,6 +1,8 @@
 #ifndef _DNSPROXY_H_
 #define _DNSPROXY_H_
 
+#include "process.h"
+
 typedef struct {
     int port;
     int cache;
@@ -21,4 +23,6 @@ void dnsproxy_add_bootstrap(dnsproxy *info, char *server);
 
 char* dnsproxy_gen_config(dnsproxy *info);
 
+process* dnsproxy_load(char *caption, dnsproxy *info, char *work_dir, char *file);
+
 #endif
diff --git a/include/process.h b/include/process.h
index ec5254b..3488308 100644
--- a/include/process.h
+++ b/include/process.h
@@ -1,7 +1,13 @@
 #ifndef _PROCESS_H_
 #define _PROCESS_H_
 
-void server_daemon();
-void init_server(char *init_script, char *custom_script);
+//void server_daemon();
+//void init_server(char *init_script, char *custom_script);
+
+typedef struct {
+    char **cmd;
+    char **env;
+    char *cwd;
+} process;
 
 #endif
diff --git a/include/utils/strList.h b/include/utils/str.h
similarity index 69%
rename from include/utils/strList.h
rename to include/utils/str.h
index 02ede62..94ae2b5 100644
--- a/include/utils/strList.h
+++ b/include/utils/str.h
@@ -1,7 +1,8 @@
-#ifndef _STRLIST_H_
-#define _STRLIST_H_
+#ifndef _STR_H_
+#define _STR_H_
 
 char* string_init(char *str);
+char* string_join(char *base, const char *add, int is_new);
 
 char** string_list_init();
 int string_list_len(char **string_list);
diff --git a/src/cleardns.c b/src/cleardns.c
index ad96ea0..ccabe72 100644
--- a/src/cleardns.c
+++ b/src/cleardns.c
@@ -2,7 +2,7 @@
 #include "common.h"
 #include "dnsproxy.h"
 
-#include "strList.h"
+#include "str.h"
 
 //#include <stdio.h>
 //#include <string.h>
@@ -52,10 +52,13 @@ int main(int argc, char *argv[]) { // ClearDNS server
 
     dnsproxy_dump("Domestic", domestic);
 
-    char *config = dnsproxy_gen_config(domestic);
-    log_info("\n%s", config);
+//    char *config = dnsproxy_gen_config(domestic);
+//    log_info("\n%s", config);
 
-    save_file("/tmp/test.txt", config);
+//    log_info("%s", string_join(WORK_DIR, "domestic.json", TRUE));
+
+    process *p = dnsproxy_load("Domestic", domestic, WORK_DIR, "domestic.json");
+    log_info("%s", string_list_dump(p->cmd));
 
 //    int debug_mode = 0;
 //    fprintf(stderr, "[ClearDNS] Server start.\n");
diff --git a/src/common.c b/src/common.c
index 543529a..d3c33ba 100644
--- a/src/common.c
+++ b/src/common.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include "common.h"
 #include "logger.h"
-#include "strList.h"
+#include "str.h"
 
 char* show_bool(int value) {
     if (value) {
diff --git a/src/common_legacy.c b/src/common_legacy.c
index 0803a4e..ae9d59e 100644
--- a/src/common_legacy.c
+++ b/src/common_legacy.c
@@ -41,7 +41,7 @@ char* read_file(char *file_name) { // read file content
 char** command_add_field(char **command_list, char *field) { // add field into command
     int num = 0;
     while(command_list[num++] != NULL); // get options number
-    command_list = (char**)realloc(command_list, sizeof(char**) * (num + 1));
+    command_list = (char**)realloc(command_list, sizeof(char*) * (num + 1));
     command_list[num - 1] = strcpy((char*)malloc(strlen(field) + 1), field);
     command_list[num] = NULL; // end sign
     return command_list;
diff --git a/src/dnsproxy.c b/src/dnsproxy.c
index 534a5a4..64d80cd 100644
--- a/src/dnsproxy.c
+++ b/src/dnsproxy.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include "dnsproxy.h"
-#include "strList.h"
+#include "str.h"
+#include "process.h"
 #include "logger.h"
 #include "common.h"
 #include "cJSON.h"
@@ -83,3 +84,16 @@ char* dnsproxy_gen_config(dnsproxy *info) {
     cJSON_Delete(config);
     return config_str;
 }
+
+process* dnsproxy_load(char *caption, dnsproxy *info, char *work_dir, char *file) {
+    char *config = dnsproxy_gen_config(info);
+
+    save_file(string_join(work_dir, file, TRUE), config);
+
+    process *demo = (process*)malloc(sizeof(process));
+    demo->cmd = command_init(DNSPROXY_BIN);
+    demo->env = string_list_init();
+    demo->cwd = work_dir;
+
+    return demo;
+}
diff --git a/src/process.c b/src/process_legacy.c
similarity index 100%
rename from src/process.c
rename to src/process_legacy.c
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index 4fd3913..1c11971 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 2.8.12)
 
-add_library(utils logger.c strList.c cJSON.c)
+add_library(utils logger.c str.c cJSON.c)
diff --git a/src/utils/strList.c b/src/utils/str.c
similarity index 69%
rename from src/utils/strList.c
rename to src/utils/str.c
index a2ee359..936fe76 100644
--- a/src/utils/strList.c
+++ b/src/utils/str.c
@@ -1,11 +1,22 @@
 #include <stdlib.h>
 #include <string.h>
-#include "strList.h"
+#include "str.h"
 
 char* string_init(char *str) {
     return strcpy((char*)malloc(strlen(str) + 1), str);
 }
 
+char* string_join(char *base, const char *add, int is_new) {
+    unsigned long string_len = strlen(base) + strlen(add);
+    if (is_new) {
+        char *ret = (char*)malloc(sizeof(char) * (string_len + 1));
+        return strcat(strcpy(ret, base), add);
+    } else {
+        base = (char*)realloc(base, sizeof(char) * (string_len + 1));
+        return strcat(base, add);
+    }
+}
+
 char* string_list_dump(char **string_list) { // ['a', 'b', 'c', ...]
     unsigned long string_len = 0;
     for (char **string = string_list; *string != NULL; ++string) {
@@ -14,7 +25,7 @@ char* string_list_dump(char **string_list) { // ['a', 'b', 'c', ...]
     if (string_len == 0) { // empty string
         string_len = 2;
     }
-    char *string_ret = (char *)malloc(sizeof(char) * (string_len + 1));
+    char *string_ret = (char*)malloc(sizeof(char) * (string_len + 1));
     string_ret[0] = '[';
     string_ret[1] = 0x00;
     for (char **string = string_list; *string != NULL; ++string) {
@@ -40,7 +51,7 @@ char** string_list_init() {
 
 char** string_list_append(char **string_list, char *string) {
     int len = string_list_len(string_list);
-    string_list = (char**)realloc(string_list, sizeof(char**) * (len + 2));
+    string_list = (char**)realloc(string_list, sizeof(char*) * (len + 2));
     string_list[len] = string_init(string);
     string_list[len + 1] = NULL; // list end sign
     return string_list;