config: support env-based SQL overrides

src/db/Main.cpp

@@ -47,6 +47,15 @@ extern void WriteVersion();
 
 namespace
 {
+struct SQLConnectionConfig
+{
+	char host[64];
+	char database[64];
+	char user[64];
+	char password[64];
+	int port;
+};
+
 const char* BoolState(bool value)
 {
 	return value ? "on" : "off";
@@ -57,6 +66,112 @@ const char* EmptyToLabel(const std::string& value, const char* fallback)
 	return value.empty() ? fallback : value.c_str();
 }
 
+bool CopyEnvString(const char* env_name, char* dest, size_t dest_size)
+{
+	const char* value = std::getenv(env_name);
+	if (!value)
+		return false;
+
+	strlcpy(dest, value, dest_size);
+	return true;
+}
+
+bool CopyEnvInt(const char* env_name, int* dest)
+{
+	const char* value = std::getenv(env_name);
+	if (!value)
+		return false;
+
+	str_to_number(*dest, value);
+	return true;
+}
+
+bool HasSQLConfig(const SQLConnectionConfig& config)
+{
+	return config.host[0] && config.database[0] && config.user[0] && config.password[0];
+}
+
+bool ParseSQLConfig(const char* value, SQLConnectionConfig* config, const char* label)
+{
+	int token_count = sscanf(
+		value,
+		" %63s %63s %63s %63s %d ",
+		config->host,
+		config->database,
+		config->user,
+		config->password,
+		&config->port);
+
+	if (token_count < 4 || !HasSQLConfig(*config))
+	{
+		fprintf(stderr, "%s syntax: <host db user password [port]>\n", label);
+		return false;
+	}
+
+	return true;
+}
+
+bool LoadSQLConfig(const char* key, const char* env_prefix, SQLConnectionConfig* config)
+{
+	char line[256 + 1];
+	bool loaded_from_file = false;
+
+	if (CConfig::instance().GetValue(key, line, sizeof(line) - 1))
+	{
+		if (!ParseSQLConfig(line, config, key))
+			return false;
+
+		loaded_from_file = true;
+	}
+
+	bool overridden = false;
+	const std::string prefix = env_prefix;
+	overridden |= CopyEnvString((prefix + "_HOST").c_str(), config->host, sizeof(config->host));
+	overridden |= CopyEnvString((prefix + "_DB").c_str(), config->database, sizeof(config->database));
+	overridden |= CopyEnvString((prefix + "_USER").c_str(), config->user, sizeof(config->user));
+	overridden |= CopyEnvString((prefix + "_PASSWORD").c_str(), config->password, sizeof(config->password));
+	overridden |= CopyEnvInt((prefix + "_PORT").c_str(), &config->port);
+
+	if (overridden)
+		sys_log(0, "CONFIG: %s overridden from environment", key);
+
+	if (!loaded_from_file && !overridden)
+	{
+		sys_err("%s not configured", key);
+		return false;
+	}
+
+	if (!HasSQLConfig(*config))
+	{
+		sys_err("%s incomplete after applying config/environment overrides", key);
+		return false;
+	}
+
+	return true;
+}
+
+bool ConnectDatabase(int slot, const SQLConnectionConfig& config, const char* label)
+{
+	sys_log(0, "connecting to MySQL server (%s)", label);
+
+	int retry_count = 5;
+	do
+	{
+		if (CDBManager::instance().Connect(slot, config.host, config.port, config.database, config.user, config.password))
+		{
+			sys_log(0, "   OK");
+			return true;
+		}
+
+		sys_log(0, "   failed, retrying in 5 seconds");
+		fprintf(stderr, "   failed, retrying in 5 seconds");
+		sleep(5);
+	}
+	while (retry_count--);
+
+	return false;
+}
+
 void LogStartupSummary(int heart_fps, int player_id_start)
 {
 	sys_log(0,
@@ -274,120 +389,43 @@ int Start()
 		g_stLocaleNameColumn = szBuf;
 	}
 
-	char szAddr[64], szDB[64], szUser[64], szPassword[64];
-	int iPort;
-	char line[256+1];
+	SQLConnectionConfig player_sql = {};
+	SQLConnectionConfig account_sql = {};
+	SQLConnectionConfig common_sql = {};
+	SQLConnectionConfig hotbackup_sql = {};
 
-	if (CConfig::instance().GetValue("SQL_PLAYER", line, 256))
-	{
-		sscanf(line, " %s %s %s %s %d ", szAddr, szDB, szUser, szPassword, &iPort);
-		sys_log(0, "connecting to MySQL server (player)");
-
-		int iRetry = 5;
-
-		do
-		{
-			if (CDBManager::instance().Connect(SQL_PLAYER, szAddr, iPort, szDB, szUser, szPassword))
-			{
-				sys_log(0, "   OK");
-				break;
-			}
-
-			sys_log(0, "   failed, retrying in 5 seconds");
-			fprintf(stderr, "   failed, retrying in 5 seconds");
-			sleep(5);
-		} while (iRetry--);
-		fprintf(stderr, "Success PLAYER\n");
-		SetPlayerDBName(szDB);
-	}
-	else
-	{
-		sys_err("SQL_PLAYER not configured");
+	if (!LoadSQLConfig("SQL_PLAYER", "METIN2_PLAYER_SQL", &player_sql))
 		return false;
-	}
 
-	if (CConfig::instance().GetValue("SQL_ACCOUNT", line, 256))
-	{
-		sscanf(line, " %s %s %s %s %d ", szAddr, szDB, szUser, szPassword, &iPort);
-		sys_log(0, "connecting to MySQL server (account)");
-
-		int iRetry = 5;
-
-		do
-		{
-			if (CDBManager::instance().Connect(SQL_ACCOUNT, szAddr, iPort, szDB, szUser, szPassword))
-			{
-				sys_log(0, "   OK");
-				break;
-			}
-
-			sys_log(0, "   failed, retrying in 5 seconds");
-			fprintf(stderr, "   failed, retrying in 5 seconds");
-			sleep(5);
-		} while (iRetry--);
-		fprintf(stderr, "Success ACCOUNT\n");
-	}
-	else
-	{
-		sys_err("SQL_ACCOUNT not configured");
+	if (!ConnectDatabase(SQL_PLAYER, player_sql, "player"))
 		return false;
-	}
 
-	if (CConfig::instance().GetValue("SQL_COMMON", line, 256))
-	{
-		sscanf(line, " %s %s %s %s %d ", szAddr, szDB, szUser, szPassword, &iPort);
-		sys_log(0, "connecting to MySQL server (common)");
+	fprintf(stderr, "Success PLAYER\n");
+	SetPlayerDBName(player_sql.database);
 
-		int iRetry = 5;
-
-		do
-		{
-			if (CDBManager::instance().Connect(SQL_COMMON, szAddr, iPort, szDB, szUser, szPassword))
-			{
-				sys_log(0, "   OK");
-				break;
-			}
-
-			sys_log(0, "   failed, retrying in 5 seconds");
-			fprintf(stderr, "   failed, retrying in 5 seconds");
-			sleep(5);
-		} while (iRetry--);
-		fprintf(stderr, "Success COMMON\n");
-	}
-	else
-	{
-		sys_err("SQL_COMMON not configured");
+	if (!LoadSQLConfig("SQL_ACCOUNT", "METIN2_ACCOUNT_SQL", &account_sql))
 		return false;
-	}
 
-	if (CConfig::instance().GetValue("SQL_HOTBACKUP", line, 256))
-	{
-		sscanf(line, " %s %s %s %s %d ", szAddr, szDB, szUser, szPassword, &iPort);
-		sys_log(0, "connecting to MySQL server (hotbackup)");
-
-		int iRetry = 5;
-
-		do
-		{
-			if (CDBManager::instance().Connect(SQL_HOTBACKUP, szAddr, iPort, szDB, szUser, szPassword))
-			{
-				sys_log(0, "   OK");
-				break;
-			}
-
-			sys_log(0, "   failed, retrying in 5 seconds");
-			fprintf(stderr, "   failed, retrying in 5 seconds");
-			sleep(5);
-		}
-		while (iRetry--);
-
-		fprintf(stderr, "Success HOTBACKUP\n");
-	}
-	else
-	{
-		sys_err("SQL_HOTBACKUP not configured");
+	if (!ConnectDatabase(SQL_ACCOUNT, account_sql, "account"))
 		return false;
-	}
+
+	fprintf(stderr, "Success ACCOUNT\n");
+
+	if (!LoadSQLConfig("SQL_COMMON", "METIN2_COMMON_SQL", &common_sql))
+		return false;
+
+	if (!ConnectDatabase(SQL_COMMON, common_sql, "common"))
+		return false;
+
+	fprintf(stderr, "Success COMMON\n");
+
+	if (!LoadSQLConfig("SQL_HOTBACKUP", "METIN2_HOTBACKUP_SQL", &hotbackup_sql))
+		return false;
+
+	if (!ConnectDatabase(SQL_HOTBACKUP, hotbackup_sql, "hotbackup"))
+		return false;
+
+	fprintf(stderr, "Success HOTBACKUP\n");
 	
 	if (!CNetPoller::instance().Create())
 	{

src/game/config.cpp

@@ -208,6 +208,113 @@ static void FN_apply_adminpage_password_env()
 	g_stAdminPagePassword = env_password;
 }
 
+static bool FN_copy_env_string(const char* env_name, char* dest, size_t dest_size)
+{
+	const char* value = std::getenv(env_name);
+	if (!value)
+		return false;
+
+	strlcpy(dest, value, dest_size);
+	return true;
+}
+
+static bool FN_copy_env_int(const char* env_name, int* dest)
+{
+	const char* value = std::getenv(env_name);
+	if (!value)
+		return false;
+
+	str_to_number(*dest, value);
+	return true;
+}
+
+static bool FN_has_sql_config(const char* host, const char* user, const char* password, const char* database)
+{
+	return host[0] && user[0] && password[0] && database[0];
+}
+
+static bool FN_parse_game_sql_config(
+	const char* value,
+	char* host,
+	size_t host_size,
+	char* user,
+	size_t user_size,
+	char* password,
+	size_t password_size,
+	char* database,
+	size_t database_size,
+	int* port,
+	const char* label)
+{
+	const char* line = two_arguments(value, host, host_size, user, user_size);
+	line = two_arguments(line, password, password_size, database, database_size);
+
+	if (line[0])
+	{
+		char port_buf[256];
+		one_argument(line, port_buf, sizeof(port_buf));
+		str_to_number(*port, port_buf);
+	}
+
+	if (!FN_has_sql_config(host, user, password, database))
+	{
+		fprintf(stderr, "%s syntax: <host user password db [port]>\n", label);
+		return false;
+	}
+
+	return true;
+}
+
+static bool FN_apply_game_sql_env(
+	const char* env_prefix,
+	char* host,
+	size_t host_size,
+	char* user,
+	size_t user_size,
+	char* password,
+	size_t password_size,
+	char* database,
+	size_t database_size,
+	int* port,
+	const char* label)
+{
+	bool overridden = false;
+	std::string prefix = env_prefix;
+
+	overridden |= FN_copy_env_string((prefix + "_HOST").c_str(), host, host_size);
+	overridden |= FN_copy_env_string((prefix + "_USER").c_str(), user, user_size);
+	overridden |= FN_copy_env_string((prefix + "_PASSWORD").c_str(), password, password_size);
+	overridden |= FN_copy_env_string((prefix + "_DB").c_str(), database, database_size);
+	overridden |= FN_copy_env_int((prefix + "_PORT").c_str(), port);
+
+	if (overridden)
+		sys_log(0, "CONFIG: %s overridden from environment", label);
+
+	return overridden;
+}
+
+static void FN_apply_db_runtime_env()
+{
+	const char* env_addr = std::getenv("METIN2_DB_ADDR");
+	if (env_addr)
+	{
+		strlcpy(db_addr, env_addr, sizeof(db_addr));
+		for (int n = 0; n < ADDRESS_MAX_LEN; ++n)
+		{
+			if (db_addr[n] == ' ')
+				db_addr[n] = '\0';
+		}
+		sys_log(0, "CONFIG: DB_ADDR overridden from environment");
+	}
+
+	int env_port = 0;
+	if (FN_copy_env_int("METIN2_DB_PORT", &env_port))
+	{
+		db_port = static_cast<WORD>(env_port);
+		sys_log(0, "CONFIG: DB_PORT overridden from environment");
+	}
+}
+
 
 bool GetIPInfo()
 {
@@ -376,8 +483,10 @@ void config_init(const string& st_localeServiceName)
 	// DB정보만 읽어와 로케일 세팅을 한후 다른 세팅을 적용시켜야한다.
 	// 이유는 로케일관련된 초기화 루틴이 곳곳에 존재하기 때문.
 
-	bool isCommonSQL = false;	
+	bool isAccountSQL = false;
+	bool isCommonSQL = false;
 	bool isPlayerSQL = false;
+	bool isLogSQL = false;
 
 	FILE* fp_common;
 	if (!(fp_common = fopen("conf/game.txt", "r")))
@@ -391,96 +500,69 @@ void config_init(const string& st_localeServiceName)
 
 		TOKEN("account_sql")
 		{
-			const char* line = two_arguments(value_string, db_host[0], sizeof(db_host[0]), db_user[0], sizeof(db_user[0]));
-			line = two_arguments(line, db_pwd[0], sizeof(db_pwd[0]), db_db[0], sizeof(db_db[0]));
-
-			if (line[0])
+			if (!FN_parse_game_sql_config(value_string,
+				db_host[0], sizeof(db_host[0]),
+				db_user[0], sizeof(db_user[0]),
+				db_pwd[0], sizeof(db_pwd[0]),
+				db_db[0], sizeof(db_db[0]),
+				&mysql_db_port[0],
+				"ACCOUNT_SQL"))
 			{
-				char buf[256];
-				one_argument(line, buf, sizeof(buf));
-				str_to_number(mysql_db_port[0], buf);
-			}
-
-			if (!*db_host[0] || !*db_user[0] || !*db_pwd[0] || !*db_db[0])
-			{
-				fprintf(stderr, "PLAYER_SQL syntax: logsql <host user password db>\n");
 				exit(1);
 			}
 
-			char buf[1024];
-			snprintf(buf, sizeof(buf), "PLAYER_SQL: %s %s %s %s %d", db_host[0], db_user[0], db_pwd[0], db_db[0], mysql_db_port[0]);
-			isPlayerSQL = true;
+			isAccountSQL = true;
 			continue;
 		}
 
 		TOKEN("player_sql")
 		{
-			const char* line = two_arguments(value_string, db_host[1], sizeof(db_host[1]), db_user[1], sizeof(db_user[1]));
-			line = two_arguments(line, db_pwd[1], sizeof(db_pwd[1]), db_db[1], sizeof(db_db[1]));
-
-			if (line[0])
+			if (!FN_parse_game_sql_config(value_string,
+				db_host[1], sizeof(db_host[1]),
+				db_user[1], sizeof(db_user[1]),
+				db_pwd[1], sizeof(db_pwd[1]),
+				db_db[1], sizeof(db_db[1]),
+				&mysql_db_port[1],
+				"PLAYER_SQL"))
 			{
-				char buf[256];
-				one_argument(line, buf, sizeof(buf));
-				str_to_number(mysql_db_port[1], buf);
-			}
-
-			if (!*db_host[1] || !*db_user[1] || !*db_pwd[1] || !*db_db[1])
-			{
-				fprintf(stderr, "PLAYER_SQL syntax: logsql <host user password db>\n");
 				exit(1);
 			}
 
-			char buf[1024];
-			snprintf(buf, sizeof(buf), "PLAYER_SQL: %s %s %s %s %d", db_host[1], db_user[1], db_pwd[1], db_db[1], mysql_db_port[1]);
 			isPlayerSQL = true;
 			continue;
 		}
 
 		TOKEN("common_sql")
 		{
-			const char* line = two_arguments(value_string, db_host[2], sizeof(db_host[2]), db_user[2], sizeof(db_user[2]));
-			line = two_arguments(line, db_pwd[2], sizeof(db_pwd[2]), db_db[2], sizeof(db_db[2]));
-
-			if (line[0])
+			if (!FN_parse_game_sql_config(value_string,
+				db_host[2], sizeof(db_host[2]),
+				db_user[2], sizeof(db_user[2]),
+				db_pwd[2], sizeof(db_pwd[2]),
+				db_db[2], sizeof(db_db[2]),
+				&mysql_db_port[2],
+				"COMMON_SQL"))
 			{
-				char buf[256];
-				one_argument(line, buf, sizeof(buf));
-				str_to_number(mysql_db_port[2], buf);
-			}
-
-			if (!*db_host[2] || !*db_user[2] || !*db_pwd[2] || !*db_db[2])
-			{
-				fprintf(stderr, "COMMON_SQL syntax: logsql <host user password db>\n");
 				exit(1);
 			}
 
-			char buf[1024];
-			snprintf(buf, sizeof(buf), "COMMON_SQL: %s %s %s %s %d", db_host[2], db_user[2], db_pwd[2], db_db[2], mysql_db_port[2]);
 			isCommonSQL = true;
 			continue;
 		}
 
 		TOKEN("log_sql")
 		{
-			const char* line = two_arguments(value_string, log_host, sizeof(log_host), log_user, sizeof(log_user));
-			line = two_arguments(line, log_pwd, sizeof(log_pwd), log_db, sizeof(log_db));
-
-			if (line[0])
+			if (!FN_parse_game_sql_config(value_string,
+				log_host, sizeof(log_host),
+				log_user, sizeof(log_user),
+				log_pwd, sizeof(log_pwd),
+				log_db, sizeof(log_db),
+				&log_port,
+				"LOG_SQL"))
 			{
-				char buf[256];
-				one_argument(line, buf, sizeof(buf));
-				str_to_number(log_port, buf);
-			}
-
-			if (!*log_host || !*log_user || !*log_pwd || !*log_db)
-			{
-				fprintf(stderr, "LOG_SQL syntax: logsql <host user password db>\n");
 				exit(1);
 			}
 
-			char buf[1024];
-			snprintf(buf, sizeof(buf), "LOG_SQL: %s %s %s %s %d", log_host, log_user, log_pwd, log_db, log_port);
+			isLogSQL = true;
 			continue;
 		}
 
@@ -763,6 +845,44 @@ void config_init(const string& st_localeServiceName)
 	}
 	fclose(fp_common);
 
+	const bool account_env_override = FN_apply_game_sql_env(
+		"METIN2_ACCOUNT_SQL",
+		db_host[0], sizeof(db_host[0]),
+		db_user[0], sizeof(db_user[0]),
+		db_pwd[0], sizeof(db_pwd[0]),
+		db_db[0], sizeof(db_db[0]),
+		&mysql_db_port[0],
+		"ACCOUNT_SQL");
+	const bool player_env_override = FN_apply_game_sql_env(
+		"METIN2_PLAYER_SQL",
+		db_host[1], sizeof(db_host[1]),
+		db_user[1], sizeof(db_user[1]),
+		db_pwd[1], sizeof(db_pwd[1]),
+		db_db[1], sizeof(db_db[1]),
+		&mysql_db_port[1],
+		"PLAYER_SQL");
+	const bool common_env_override = FN_apply_game_sql_env(
+		"METIN2_COMMON_SQL",
+		db_host[2], sizeof(db_host[2]),
+		db_user[2], sizeof(db_user[2]),
+		db_pwd[2], sizeof(db_pwd[2]),
+		db_db[2], sizeof(db_db[2]),
+		&mysql_db_port[2],
+		"COMMON_SQL");
+	const bool log_env_override = FN_apply_game_sql_env(
+		"METIN2_LOG_SQL",
+		log_host, sizeof(log_host),
+		log_user, sizeof(log_user),
+		log_pwd, sizeof(log_pwd),
+		log_db, sizeof(log_db),
+		&log_port,
+		"LOG_SQL");
+
+	isAccountSQL = isAccountSQL || account_env_override || FN_has_sql_config(db_host[0], db_user[0], db_pwd[0], db_db[0]);
+	isPlayerSQL = isPlayerSQL || player_env_override || FN_has_sql_config(db_host[1], db_user[1], db_pwd[1], db_db[1]);
+	isCommonSQL = isCommonSQL || common_env_override || FN_has_sql_config(db_host[2], db_user[2], db_pwd[2], db_db[2]);
+	isLogSQL = isLogSQL || log_env_override || FN_has_sql_config(log_host, log_user, log_pwd, log_db);
+
 	FILE* fpOnlyForDB;
 
 	if (!(fpOnlyForDB = fopen(st_configFileName.c_str(), "r")))
@@ -836,17 +956,41 @@ void config_init(const string& st_localeServiceName)
 		exit(1);
 	}
 
-	if (!isPlayerSQL)
+	if (g_bAuthServer && !isAccountSQL)
+	{
+		puts("LOAD_ACCOUNT_SQL_INFO_FAILURE:");
+		puts("");
+		puts("CONFIG:");
+		puts("------------------------------------------------");
+		puts("ACCOUNT_SQL: HOST USER PASSWORD DATABASE [PORT]");
+		puts("");
+		exit(1);
+	}
+
+	if (!g_bAuthServer && !isPlayerSQL)
 	{
 		puts("LOAD_PLAYER_SQL_INFO_FAILURE:");
 		puts("");
 		puts("CONFIG:");
 		puts("------------------------------------------------");
-		puts("PLAYER_SQL: HOST USER PASSWORD DATABASE");
+		puts("PLAYER_SQL: HOST USER PASSWORD DATABASE [PORT]");
 		puts("");
 		exit(1);
 	}
 
+	if (!g_bAuthServer && !isLogSQL)
+	{
+		puts("LOAD_LOG_SQL_INFO_FAILURE:");
+		puts("");
+		puts("CONFIG:");
+		puts("------------------------------------------------");
+		puts("LOG_SQL: HOST USER PASSWORD DATABASE [PORT]");
+		puts("");
+		exit(1);
+	}
+
+	FN_apply_db_runtime_env();
+
 	// Common DB 가 Locale 정보를 가지고 있기 때문에 가장 먼저 접속해야 한다.
 	AccountDB::instance().Connect(db_host[2], mysql_db_port[2], db_user[2], db_pwd[2], db_db[2]);
 
@@ -1248,4 +1392,3 @@ bool IsValidFileCRC(DWORD dwCRC)
 {
 	return s_set_dwFileCRC.find(dwCRC) != s_set_dwFileCRC.end();
 }
-