+char *decstr(char **p, size_t *len);
+char *vsprintf2(char *format, va_list al);
+char *sprintf2(char *format, ...);
+char *sprintf3(char *format, ...);
+off_t atoo(char *n);
+char **tokenize(char *src);
+void freeca(char **ca);
+int calen(char **a);