--- php-5.0.1/main/streams/plain_wrapper.c	2004-07-31 13:00:10.000000000 +0200
+++ php-5.0.1-patch/main/streams/plain_wrapper.c	2004-08-26 01:03:53.328106456 +0200
@@ -732,6 +732,7 @@
 					return fd == -1 ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
 
 				case PHP_STREAM_TRUNCATE_SET_SIZE:
+					stream->position = *(size_t*) ptrparam;
 					return ftruncate(fd, *(size_t*)ptrparam) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
 			}