__res_state
typedef struct __res_state *res_state;
extern struct __res_state *__res_state(void) __attribute__ ((__const__));
#define _res (*__res_state())
struct __res_state state;
memset(&state, 0, sizeof(struct __res_state));
extern struct __res_state *__res_get_state(void);
extern void __res_put_state(struct __res_state *);
struct __res_state; /*%< forward */
void __h_errno_set(struct __res_state *, int);
extern struct __res_state _nres;
extern struct __res_state _nres;
struct __res_state _nres
struct __res_state st_res;
res_state __res_state(void);