mysql - a mysql handle, which was previously allocated by mysql_init() or mysql_real_connect(). For general information which is not bound to connection this parameter might be null.
value - the type of value you want to retrieve. See description below.
arg - pointer to a variable for storing value of the specified option.
... - variable argument list
Retrieves generic or connection specific information. Returns zero on success, non-zero if an error occurred (invalid option), This function was added in MariaDB Connector/C 3.0,
For these information types of parameters mysql needs to be set to NULL.
MARIADB_CHARSET_NAME: Retrieves the charset information for a character set by its literal representation.Parameter type: const MARIADB_CHARSET_INFO*.
MARIADB_CLIENT_ERRORS: Retrieve array of client errors. This can be used in plugins to set global error messages (which are not exported by MariaDB Connector/C).Parameter type: const char **.
MARIADB_CLIENT_VERSION
MARIADB_CONNECTION_ASYNC_TIMEOUT: Retrieves the timeout for non-blocking calls in seconds.Parameter type: unsigned int.
MARIADB_CONNECTION_ASYNC_TIMEOUT_MS: Retrieves the timeout for non-blocking calls in milliseconds.Parameter type: unsigned int.
MARIADB_CONNECTION_MARIADB_CHARSET_INFO
int mariadb_get_infov(MYSQL * mysql,
enum mariadb_value value,
void * arg,
...);const char *MARIADB_CLIENT_VERSION_ID: The client version in numeric format.Parameter type: unsigned int.
MARIADB_MAX_ALLOWED_PACKET: Retrieves value of maximum allowed packet size.Parameter type: size_t
MARIADB_NET_BUFFER_LENGTH: Retrieves the length of net buffer.Parameter type: size_t
MARIADB_TLS_LIBRARY: The TLS library MariaDB Connector/C is compiled against.Parameter type: const char *.
const MY_CHARSET_INFO *MARIADB_CONNECTION_CLIENT_CAPABILITIES: Returns the capability flags of the client.Parameter type: unsigned long.
MARIADB_CONNECTION_ERROR: Retrieves error message for last used command. Parameter type: const char *.
MARIADB_CONNECTION_ERROR_ID: Retrieves error number for last used command. Parameter type: unsigned int.
MARIADB_CONNECTION_EXTENDED_SERVER_CAPABILITIES: Returns the extended capability flags of the connected MariaDB server.Parameter type: unsigned long.
MARIADB_CONNECTION_HOST: Retrieves connection's host name. Parameter type: const char *.
MARIADB_CONNECTION_INFO: Retrieves generic info for last used command.Parameter type: const char *.
MARIADB_CONNECTION_PORT: Retrieves the port number of server host.Parameter type: unsigned int.
MARIADB_CONNECTION_PROTOCOL_VERSION_ID: Retrieves the protocol version number.Parameter type: unsigned int.
MARIADB_CONNECTION_PVIO_TYPE: Retrives the pvio plugin used for specified connection.Parameter type: unsigned int.
MARIADB_CONNECTION_SCHEMA: Retrieves the current schema.Parameter type: const char*.
MARIADB_CONNECTION_SERVER_CAPABILITIES: Returns the capability flags of the connected server.Parameter type: unsigned long.
MARIADB_CONNECTION_SERVER_STATUS: Returns server status after last operation. A list of possible flags can be found in the description OK packet.Parameter type: unsigned int.
MARIADB_CONNECTION_SERVER_TYPE: Retrieves the type of the server.Parameter type: const char*.
MARIADB_CONNECTION_SERVER_VERSION: Retrieves the server version in literal format.Parameter type: const char *.
MARIADB_CONNECTION_SERVER_VERSION_ID: Retrieves the server version in numeric format.Parameter type: unsigned int.
MARIADB_CONNECTION_SOCKET: Retrieves the handle (socket) for given connection.Parameter type: my_socket.
MARIADB_CONNECTION_SQLSTATE: Retrieves current sqlstate information for last used command. Parameter type: const char *.
MARIADB_CONNECTION_SSL_CIPHER: Retrieves the TLS cipher in use.Parameter type: const char *.
MARIADB_CONNECTION_TLS_VERSION: Retrieves the TLS protocol version used in literal format.Parameter type: char *.
MARIADB_CONNECTION_TLS_VERSION_ID: Retrieves the TLS protocol version used in numeric format.Parameter type: unsigned int.
MARIADB_CONNECTION_UNIX_SOCKET: Retrieves the file name of the unix socketParameter type: const char *.
MARIADB_CONNECTION_USER: Retrieves connection's user name.Parameter type: const char *.
/* get server port for current connection */
unsigned int port;
mariadb_get_infov(mysql, MARIADB_CONNECTION_PORT, void *)&port);/* get user name for current connection */
const char *user;
mariadb_get_infov(mysql, MARIADB_CONNECTION_USER, (void *)&user);