+#elif HAVE_SWAPCTL
+ struct swapent *swap_entries;
+ int swap_num;
+ int status;
+ int i;
+
+ uint64_t used = 0;
+ uint64_t total = 0;
+
+ /*
+ * XXX: This is the syntax for the *BSD `swapctl', which has the
+ * following prototype:
+ * swapctl (int cmd, void *arg, int misc);
+ *
+ * HP-UX and Solaris (and possibly other UNIXes) provide `swapctl',
+ * too, but with the following prototype:
+ * swapctl (int cmd, void *arg);
+ *
+ * Solaris is usually handled in the KSTAT case above. For other UNIXes
+ * a separate case for the other version of `swapctl' may be necessary.
+ */
+ swap_num = swapctl (SWAP_NSWAP, NULL, 0);
+ if (swap_num < 0)
+ {
+ ERROR ("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.",
+ swap_num);
+ return (-1);
+ }
+ else if (swap_num == 0)
+ return (0);
+
+ swap_entries = calloc (swap_num, sizeof (*swap_entries));
+ if (swap_entries == NULL)
+ {
+ ERROR ("swap plugin: calloc failed.");
+ return (-1);
+ }
+
+ status = swapctl (SWAP_STATS, swap_entries, swap_num);
+ if (status != swap_num)
+ {
+ ERROR ("swap plugin: swapctl (SWAP_STATS) failed with status %i.",
+ status);
+ sfree (swap_entries);
+ return (-1);
+ }
+
+#if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
+# define C_SWAP_BLOCK_SIZE ((uint64_t) DEV_BSIZE)
+#else
+# define C_SWAP_BLOCK_SIZE ((uint64_t) 512)
+#endif
+
+ for (i = 0; i < swap_num; i++)
+ {
+ if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
+ continue;
+
+ used += ((uint64_t) swap_entries[i].se_inuse)
+ * C_SWAP_BLOCK_SIZE;
+ total += ((uint64_t) swap_entries[i].se_nblks)
+ * C_SWAP_BLOCK_SIZE;
+ }
+
+ if (total < used)
+ {
+ ERROR ("swap plugin: Total swap space (%"PRIu64") "
+ "is less than used swap space (%"PRIu64").",
+ total, used);
+ return (-1);
+ }
+
+ swap_submit ("used", (gauge_t) used);
+ swap_submit ("free", (gauge_t) (total - used));
+
+ sfree (swap_entries);
+/* #endif HAVE_SWAPCTL */
+