+static int setup_boot_id(const char *dest) {
+ char _cleanup_free_ *from = NULL, *to = NULL;
+ sd_id128_t rnd;
+ char as_uuid[37];
+ int r;
+
+ assert(dest);
+
+ /* Generate a new randomized boot ID, so that each boot-up of
+ * the container gets a new one */
+
+ from = strappend(dest, "/dev/proc-sys-kernel-random-boot-id");
+ to = strappend(dest, "/proc/sys/kernel/random/boot_id");
+ if (!from || !to)
+ return log_oom();
+
+ r = sd_id128_randomize(&rnd);
+ if (r < 0) {
+ log_error("Failed to generate random boot id: %s", strerror(-r));
+ return r;
+ }
+
+ snprintf(as_uuid, sizeof(as_uuid),
+ "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+ SD_ID128_FORMAT_VAL(rnd));
+ char_array_0(as_uuid);
+
+ r = write_one_line_file(from, as_uuid);
+ if (r < 0) {
+ log_error("Failed to write boot id: %s", strerror(-r));
+ return r;
+ }
+
+ if (mount(from, to, "bind", MS_BIND, NULL) < 0) {
+ log_error("Failed to bind mount boot id: %m");
+ r = -errno;
+ } else
+ mount(from, to, "bind", MS_BIND|MS_REMOUNT|MS_RDONLY, NULL);
+
+ unlink(from);
+ return r;
+}
+