typedef int line_handler_t(char *, void *);
int for_each_line(char *buf, size_t size, line_handler_t *line_handler,
void *private_data);
int for_each_line_ro(char *buf, size_t size, line_handler_t line_handler,
void *private_data);
typedef int line_handler_t(char *, void *);
int for_each_line(char *buf, size_t size, line_handler_t *line_handler,
void *private_data);
int for_each_line_ro(char *buf, size_t size, line_handler_t line_handler,
void *private_data);