char *stackerr;/* current lower-layer error string, or null if none */
int iofile; /* UNIX file descriptor for iochannel */
int timeout; /* how long to wait for trailing blocks (ignored for now) */
char *stackerr;/* current lower-layer error string, or null if none */
int iofile; /* UNIX file descriptor for iochannel */
int timeout; /* how long to wait for trailing blocks (ignored for now) */