+ if (GNUNET_YES == GNUNET_DISK_file_test (filename))
+ bf->fh =
+ GNUNET_DISK_file_open (filename,
+ GNUNET_DISK_OPEN_READWRITE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL != bf->fh)
+ {
+ /* file existed, try to read it! */
+ must_read = GNUNET_YES;
+ if (GNUNET_OK !=
+ GNUNET_DISK_file_handle_size (bf->fh, &fsize))
+ {
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ if (fsize == 0)
+ {
+ /* found existing empty file, just overwrite */
+ if (GNUNET_OK != make_empty_file (bf->fh, size * 4LL))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "write");
+ GNUNET_DISK_file_close (bf->fh);
+ GNUNET_free (bf);
+ return NULL;
+ }
+ }
+ else if (fsize != size * 4LL)