Virtual Method

GioFileIOStreamquery_info

since: 2.22

Declaration [src]

GFileInfo*
query_info (
  GFileIOStream* stream,
  const char* attributes,
  GCancellable* cancellable,
  GError** error
)

Description [src]

Queries a file io stream for the given attributes. This function blocks while querying the stream. For the asynchronous version of this function, see g_file_io_stream_query_info_async(). While the stream is blocked, the stream will set the pending flag internally, and any other operations on the stream will fail with G_IO_ERROR_PENDING.

Can fail if the stream was already closed (with error being set to G_IO_ERROR_CLOSED), the stream has pending operations (with error being set to G_IO_ERROR_PENDING), or if querying info is not supported for the stream’s interface (with error being set to G_IO_ERROR_NOT_SUPPORTED). I all cases of failure, NULL will be returned.

If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be set, and NULL will be returned.

Available since: 2.22

Parameters

attributes

Type: const char*

A file attribute query string.

The data is owned by the caller of the method.

The value is a NUL terminated UTF-8 string.

cancellable

Type: GCancellable

Optional GCancellable object, NULL to ignore.

The argument can be NULL.

The data is owned by the caller of the method.

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 a NULL GError*.

The argument will be left initialized to NULL by the virtual 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.

Return value

Type: GFileInfo

A GFileInfo for the stream, or NULL on error.

The caller of the method takes ownership of the returned data, and is responsible for freeing it.