-int kfile_putc(int c, struct KFile *fd); ///< Generic putc implementation using kfile_write.
-int kfile_getc(struct KFile *fd); ///< Generic getc implementation using kfile_read.
-int kfile_printf(struct KFile *fd, const char *format, ...);
-int kfile_print(struct KFile *fd, const char *s);
-int kfile_gets(struct KFile *fd, char *buf, int size);
-int kfile_gets_echo(struct KFile *fd, char *buf, int size, bool echo);
-void kfile_resync(KFile *fd, mtime_t delay);
-void kfile_init(struct KFile *fd);