char *to_doc; /* Documentation. Does not include trailing
newline, and starts with a one-line descrip-
tion (probably similar to to_longname). */
+ /* Per-target scratch pad. */
+ void *to_data;
/* The open routine takes the rest of the parameters from the
command, and (if successful) pushes a new target onto the
stack. Targets should supply this routine, if only to provide