void (*size) (void *handle, int width, int height);
void (*special) (void *handle, Telnet_Special code);
const struct telnet_special *(*get_specials) (void *handle);
void (*size) (void *handle, int width, int height);
void (*special) (void *handle, Telnet_Special code);
const struct telnet_special *(*get_specials) (void *handle);
int (*exitcode) (void *handle);
/* If back->sendok() returns FALSE, data sent to it from the frontend
* may be lost. */
int (*exitcode) (void *handle);
/* If back->sendok() returns FALSE, data sent to it from the frontend
* may be lost. */