Function
GLibOptionArgFunc
Declaration
gboolean
(* GOptionArgFunc) (
  const gchar* option_name,
  const gchar* value,
  gpointer data,
  GError** error
)
Parameters
- option_name
- 
            Type: const gchar*The name of the option being parsed. This will be either a single dash followed by a single letter (for a short name) or two dashes followed by a long option name. The data is owned by the caller of the function. The value is a NUL terminated UTF-8 string. 
- value
- 
            Type: const gchar*The value to be parsed. The data is owned by the caller of the function. The value is a NUL terminated UTF-8 string. 
- data
- 
            Type: gpointerUser data added to the GOptionGroupcontaining the option when it was created with g_option_group_new().The argument can be NULL.The data is owned by the caller of the function. 
- error
- 
            Type: GError **The return location for a recoverable error. The argument can be NULL.If the return location is not NULL, then you must initialize it to aNULLGError*.The argument will be left initialized to NULLby the function if there are no errors.In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.