#define NOTOK (-1)
#define OK 0
#define DONE 1

int pop_init (char *host);
int pop_command (char *fmt, ...);
int pop_stat (int *nmsgs, int *nbytes);
int getline (char *buf, int n, FILE *fp);
int putline (char *buf, char *err, FILE *fp);
int multiline (char *buf, int n, FILE *fp);
char *pop_get_mailhost (char *user);

/* utilities */
void *xmalloc (int bytes);
char *xstrdup (const char *str);