bool

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                      MONGOC_CLIENT_SET_APPNAME(3)

       • client: A mongoc_client_t.

       • appname: The application name, of length at most MONGOC_HANDSHAKE_APPNAME_MAX.

       true if the appname is set successfully. Otherwise, false.

          bool
          mongoc_client_set_appname (mongoc_client_t *client, const char *appname)

       Sets the application name for this client. This string, along with other internal driver details, is sent
       to the server as part of the initial connection handshake ("hello").

       appname is copied, and doesn't have to remain valid after the call to mongoc_client_set_appname().

       This function will log an error and return false in the following cases:

       • appname is longer than MONGOC_HANDSHAKE_APPNAME_MAX

       • client has already initiated a handshake

       • client is from a mongoc_client_pool_t