detect 'GeoIP/alias' correctly

geoip_file.cpp

@@ -27,6 +27,36 @@ typedef size_t (*call_back_function_ptr)(char*, size_t, size_t, void*);
 CURLcode download_geoip_block(const std::string &url, void *write_to, call_back_function_ptr call_back);
 map<string, string> unpack_archive(shared_ptr<archive> current_archive_ptr);
 
+bool access_or_create_folder(const std::string &folder_name, bool slience_mode)
+{
+	fs::path target_folder = folder_name;
+	if (!fs::exists(target_folder))
+	{
+		if (!slience_mode) cout << target_folder << " not exist\n";
+		if (access_or_create_folder(target_folder.parent_path(), slience_mode))
+		{
+			if (access(target_folder.parent_path().c_str(), W_OK) != 0)
+			{
+				if (!slience_mode) cout << target_folder.parent_path() << " cannot write (no permission)\n";
+				return false;
+			}
+
+			if (fs::create_directory(target_folder))
+			{
+				if (!slience_mode) cout << target_folder << " created\n";
+			}
+			else
+			{
+				if (!slience_mode) cout << target_folder << " cannot create\n";
+				return false;
+			}
+		}
+		else return false;
+	}
+
+	return true;
+}
+
 bool download_geoip_block_file(const std::string &url, shared_ptr<FILE> temp_file)
 {
 	auto res = download_geoip_block(url, temp_file.get(),

geoip_file.hpp

@@ -5,8 +5,9 @@
 #include <memory>
 #include <vector>
 
+bool access_or_create_folder(const std::string &folder_name, bool slience_mode);
 bool download_geoip_block_file(const std::string &url, std::shared_ptr<FILE> temp_file);
 std::vector<char> download_geoip_block_memory(const std::string &url);
 std::map<std::string, std::string> unpack_archive(std::vector<char> &received_data);
 std::map<std::string, std::string> unpack_archive(std::vector<char> &&received_data);
-std::map<std::string, std::string> unpack_archive(std::shared_ptr<FILE> temp_file);
+std::map<std::string, std::string> unpack_archive(std::shared_ptr<FILE> temp_file);

main.cpp

@@ -37,7 +37,7 @@ int main(int argc, char *argv[])
             default:
                 cout << "Usage: \n";
                 cout << application_name << " [-option]\n";
-                cout << application_name << " (without parameter): the same as \"" << application_name << " -m\"\n";
+                cout << application_name << " <without parameter>: the same as \"" << application_name << " -m\"\n";
                 cout << application_name << " -m\t" "Download and Parse GeoIP file in memory directly (faster)\n";
                 cout << application_name << " -f\t" "Download and Parse GeoIP file in /tmp (save memory)\n";
                 cout << application_name << " -s\t" "Slience mode (no stdout message)\n";
@@ -46,14 +46,11 @@ int main(int argc, char *argv[])
         }
     }
 
-    if (!fs::exists("/usr/local/share/GeoIP/alias"))
+    if (!access_or_create_folder("/usr/local/share/GeoIP/alias", slience_mode))
     {
-        if (!fs::create_directory("/usr/local/share/GeoIP/alias"))
-        {
-            if(!slience_mode)
-                cerr << "Cannot access '/usr/local/share/GeoIP/alias'.\n\n";
-            return -1;
-        }
+        if (!slience_mode)
+            cerr << "Cannot access '/usr/local/share/GeoIP/alias'.\n\n";
+        return -1;
     }
 
     string json_record = R"({"address_count":{0},"file_count":{1},"timestamp":"{2}","locations_filename":"GeoLite2-Country-Locations-en.csv","address_sources":{"IPv4":"GeoLite2-Country-Blocks-IPv4.csv","IPv6":"GeoLite2-Country-Blocks-IPv6.csv"}})";