+ /* available since linux-3.2 */
+ r = read_one_line_file("/proc/sys/kernel/cap_last_cap", &content);
+ if (r >= 0) {
+ r = safe_atolu(content, &p);
+ if (r >= 0) {
+ saved = p;
+ valid = true;
+ return p;
+ }
+ }
+
+ /* fall back to syscall-probing for pre linux-3.2 */