int same_fd(int a, int b);
-int chattr_fd(int fd, bool b, int mask);
-int chattr_path(const char *p, bool b, int mask);
+int chattr_fd(int fd, bool b, unsigned mask);
+int chattr_path(const char *p, bool b, unsigned mask);
+
+int read_attr_fd(int fd, unsigned *ret);
+int read_attr_path(const char *p, unsigned *ret);
#define RLIMIT_MAKE_CONST(lim) ((struct rlimit) { lim, lim })