Re: File copying

[Nader Morshed <morshed nader gmail com>]

On Mon, 7 Feb 2011 07:58:57 +0000
John Emmas <johne53 tiscali co uk> wrote:

> On 6 Feb 2011, at 19:05, Nader Morshed wrote:
>
> Thanks Nader.  Is this the document you mean:-
>
> http://library.gnome.org/devel//gio/2.26/GFileInfo.html

Yep, or in particular:

http://library.gnome.org/devel/gio/2.26/GFileInfo.html#GFileInfo.description

> g_file_query_info (pDestObject, G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN,
>                          G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
>                          false, &error);

The API for g_file_query_info states that the 4th parameter should be a
GCancellable object or NULL, though in this case no error occurs
because false == 0 == NULL.

http://library.gnome.org/devel/gio/2.26/GFile.html#g-file-query-info

> void SetHiddenAttribute (GFile* pFile, GFileInfo* pInfo, GError**
> ppError) {
> GError* error = NULL;
>
>       g_file_info_set_is_hidden (pinfo,  true);
>
>       g_file_set_attributes_from_info (pFile,  pInfo,
>                          G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,  NULL,
> &error);
>
>       if (error)
>             g_propagate_error (ppError, error);
> }

I believe you can pass ppError directly to
g_file_set_attributes_from_info() in this case, as you just copy error
over anyways, but you might want to double-check that, it otherwise
looks fine.

> However, the call to g_file_set_attributes_from_info() fails with
> this error:-
>
> error code 15  :  message=0x02894d80  "Setting attribute
> standard::is-hidden not supported"

It seems that would be due to a rather crummy implementation of
GLocalFile which only handles getting the standard::is-hidden
attribute, not setting it:

http://git.gnome.org/browse/glib/tree/gio/glocalfileinfo.c#n2200

I might advise bugging your nearest glib developer to fix this :)

--
Nader Morshed <morshed nader gmail com>