extern void reply_with_error (const char *fs, ...)
__attribute__((format (printf,1,2)));
extern void reply_with_perror_errno (int err, const char *fs, ...)
extern void reply_with_error (const char *fs, ...)
__attribute__((format (printf,1,2)));
extern void reply_with_perror_errno (int err, const char *fs, ...)