+extern int ochdir(const char *dir, int options);
+extern int ostat(const char *path, struct stat *buf, int options);
+extern int ostatat(int dirfd, const char *path, struct stat *st, int options);
+extern int ochown(const char *path, uid_t owner, gid_t group, int options);
+extern int ochmod(char *path, mode_t mode, const struct stat *st, int options);
+