39 struct chat {  struct
40   struct fdescriptor desc;
41   struct physical *physical;
43   int state;				/* Our CHAT_* status */
45   char script[LINE_LEN];		/* Our arg buffer */
46   char *argv[MAXARGS];			/* Our arguments (pointing to script) */
47   int argc;				/* Number of argv's */
49   int arg;				/* Our current arg number */
50   char exp[LINE_LEN];			/* Our translated current argument */
51   char *argptr;				/* Our current arg pointer */
52   int arglen;				/* The length of argptr */
76 #define descriptor2chat(d) \  argument
77   ((d)->type == CHAT_DESCRIPTOR ? (struct chat *)(d) : NULL)  argument