#define LEN(x) (sizeof (x) / sizeof *(x))
+extern char *argv0;
+
+void warn(const char *, ...);
+void die(const char *, ...);
+
+int esnprintf(char *str, size_t size, const char *fmt, ...);
const char *bprintf(const char *fmt, ...);
+const char *fmt_human(size_t num, int base);
int pscanf(const char *path, const char *fmt, ...);