static gssize
g_local_file_output_stream_write (GOutputStream *stream,
const void *buffer,
gsize count,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
gssize res;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
while (1)
{
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return -1;
res = write (file->priv->fd, buffer, count);
if (res == -1)
{
int errsv = errno;
if (errsv == EINTR)
continue;
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error writing to file: %s"),
g_strerror (errsv));
}
break;
}
return res;
}
static gboolean
g_local_file_output_stream_seek (GFileOutputStream *stream,
goffset offset,
GSeekType type,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
off_t pos;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
pos = lseek (file->priv->fd, offset, seek_type_to_lseek (type));
if (pos == (off_t)-1)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error seeking in file: %s"),
g_strerror (errsv));
return FALSE;
}
return TRUE;
}
static int
g_local_file_output_stream_get_fd (GFileDescriptorBased *fd_based)
{
GLocalFileOutputStream *stream = G_LOCAL_FILE_OUTPUT_STREAM (fd_based);
return stream->priv->fd;
}
static char *
g_local_file_output_stream_get_etag (GFileOutputStream *stream)
{
GLocalFileOutputStream *file;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
return g_strdup (file->priv->etag);
}
static void
g_local_file_output_stream_finalize (GObject *object)
{
GLocalFileOutputStream *file;
file = G_LOCAL_FILE_OUTPUT_STREAM (object);
g_free (file->priv->tmp_filename);
g_free (file->priv->original_filename);
g_free (file->priv->backup_filename);
g_free (file->priv->etag);
G_OBJECT_CLASS (g_local_file_output_stream_parent_class)->finalize (object);
}
static gboolean
g_local_file_io_stream_close (GIOStream *stream,
GCancellable *cancellable,
GError **error)
{
GLocalFileIOStream *file = G_LOCAL_FILE_IO_STREAM (stream);
/* There are shortcutted and can't fail */
g_output_stream_close (file->output_stream, cancellable, NULL);
g_input_stream_close (file->input_stream, cancellable, NULL);
return
_g_local_file_output_stream_really_close (G_LOCAL_FILE_OUTPUT_STREAM (file->output_stream),
cancellable, error);
}
static gboolean
g_local_file_output_stream_can_seek (GFileOutputStream *stream)
{
GLocalFileOutputStream *file;
off_t pos;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
pos = lseek (file->priv->fd, 0, SEEK_CUR);
if (pos == (off_t)-1 && errno == ESPIPE)
return FALSE;
return TRUE;
}
static goffset
g_local_file_output_stream_tell (GFileOutputStream *stream)
{
GLocalFileOutputStream *file;
off_t pos;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
pos = lseek (file->priv->fd, 0, SEEK_CUR);
if (pos == (off_t)-1)
return 0;
return pos;
}
static gboolean
g_local_file_output_stream_close (GOutputStream *stream,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
if (file->priv->do_close)
return _g_local_file_output_stream_really_close (file,
cancellable,
error);
return TRUE;
}
static GFileInfo *
g_local_file_output_stream_query_info (GFileOutputStream *stream,
char *attributes,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
return _g_local_file_info_get_from_fd (file->priv->fd,
attributes,
error);
}
static gboolean
g_local_file_output_stream_truncate (GFileOutputStream *stream,
goffset size,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
int res;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
restart:
#ifdef G_OS_WIN32
res = g_win32_ftruncate (file->priv->fd, size);
#else
res = ftruncate (file->priv->fd, size);
#endif
if (res == -1)
{
int errsv = errno;
if (errsv == EINTR)
{
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
goto restart;
}
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error truncating file: %s"),
g_strerror (errsv));
return FALSE;
}
return TRUE;
}
static gboolean
g_local_file_output_stream_close (GOutputStream *stream,
GCancellable *cancellable,
GError **error)
{
GLocalFileOutputStream *file;
GLocalFileStat final_stat;
int res;
file = G_LOCAL_FILE_OUTPUT_STREAM (stream);
#ifdef G_OS_WIN32
/* Must close before renaming on Windows, so just do the close first
* in all cases for now.
*/
if (_fstati64 (file->priv->fd, &final_stat) == 0)
file->priv->etag = _g_local_file_info_create_etag (&final_stat);
res = close (file->priv->fd);
if (res == -1)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error closing file: %s"),
g_strerror (errsv));
return FALSE;
}
#endif
if (file->priv->tmp_filename)
{
/* We need to move the temp file to its final place,
* and possibly create the backup file
*/
if (file->priv->backup_filename)
{
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto err_out;
#ifdef HAVE_LINK
/* create original -> backup link, the original is then renamed over */
if (g_unlink (file->priv->backup_filename) != 0 &&
errno != ENOENT)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
G_IO_ERROR_CANT_CREATE_BACKUP,
_("Error removing old backup link: %s"),
g_strerror (errsv));
goto err_out;
}
if (link (file->priv->original_filename, file->priv->backup_filename) != 0)
{
/* link failed or is not supported, try rename */
if (g_rename (file->priv->original_filename, file->priv->backup_filename) != 0)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
G_IO_ERROR_CANT_CREATE_BACKUP,
_("Error creating backup copy: %s"),
g_strerror (errsv));
goto err_out;
}
}
#else
/* If link not supported, just rename... */
if (g_rename (file->priv->original_filename, file->priv->backup_filename) != 0)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
G_IO_ERROR_CANT_CREATE_BACKUP,
_("Error creating backup copy: %s"),
g_strerror (errsv));
goto err_out;
}
#endif
}
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto err_out;
/* tmp -> original */
if (g_rename (file->priv->tmp_filename, file->priv->original_filename) != 0)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errno),
_("Error renaming temporary file: %s"),
g_strerror (errsv));
goto err_out;
}
}
if (g_cancellable_set_error_if_cancelled (cancellable, error))
goto err_out;
#ifndef G_OS_WIN32 /* Already did the fstat() and close() above on Win32 */
if (fstat (file->priv->fd, &final_stat) == 0)
file->priv->etag = _g_local_file_info_create_etag (&final_stat);
while (1)
{
res = close (file->priv->fd);
if (res == -1)
{
int errsv = errno;
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error closing file: %s"),
g_strerror (errsv));
}
break;
}
return res != -1;
#else
return TRUE;
#endif
err_out:
#ifndef G_OS_WIN32
/* A simple try to close the fd in case we fail before the actual close */
close (file->priv->fd);
#endif
return FALSE;
}
