This function outputs
key_file as a string.
Note that this function never reports an error,
so it is safe to pass
Available since: 2.6
Return location for the length of the returned string, or
The argument will be set by the function. The argument can be
The return location for a recoverable error.
The argument can be
If the return location is not
NULL, then you must initialize it to a
The argument will left initialized to
NULLby the method 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.