pollution: mknod
int mknod(const char *, mode_t, dev_t); 

pollution: mknodat
int mknodat(int, const char *, mode_t, dev_t) __attribute__((availability(macos,introduced=13.0))) __attribute__((availability(ios,introduced=16.0))) __attribute__((availability(tvos,introduced=16.0))) __attribute__((availability(watchos,introduced=9.0)));