pollution: path
pollution: mode
int creat(const char* path, mode_t mode); 

pollution: fd
pollution: cmd
int fcntl(int fd, int cmd, ...); 

pollution: path
pollution: oflag
int open(const char* path, int oflag, ...); 

pollution: fd
pollution: path
pollution: oflag
int openat(int fd, const char* path, int oflag, ...); 

pollution: AT_REMOVEFILE
#define AT_REMOVEFILE (1<<3)