+ #if HAVE_SWAPCTL_TWO_ARGS
+ swaptbl_t *s;
+ char strtab[255];
+ int swap_num;
+ int status;
+ int i;
+
+ derive_t avail = 0;
+ derive_t total = 0;
+
+ swap_num = swapctl (SC_GETNSWP, NULL);
+ if (swap_num < 0)
+ {
+ ERROR ("swap plugin: swapctl (SC_GETNSWP) failed with status %i.",
+ swap_num);
+ return (-1);
+ }
+ else if (swap_num == 0)
+ return (0);
+
+ s = (swaptbl_t *) smalloc (swap_num * sizeof (swapent_t) + sizeof (struct swaptable));
+ if (s == NULL)
+ {
+ ERROR ("swap plugin: smalloc failed.");
+ return (-1);
+ }
+ /* Initialize string pointers. We have them share the same buffer as we don't care
+ * about the device's name, only its size. This saves memory and alloc/free ops */
+ for (i = 0; i < (swap_num + 1); i++) {
+ s->swt_ent[i].ste_path = strtab;
+ }
+ s->swt_n = swap_num + 1;
+ status = swapctl (SC_LIST, s);
+ if (status != swap_num)
+ {
+ ERROR ("swap plugin: swapctl (SC_LIST) failed with status %i.",
+ status);
+ sfree (s);
+ return (-1);
+ }
+
+ for (i = 0; i < swap_num; i++)
+ {
+ if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
+ continue;
+
+ avail += ((derive_t) s->swt_ent[i].ste_free)
+ * pagesize;
+ total += ((derive_t) s->swt_ent[i].ste_pages)
+ * pagesize;
+ }
+
+ if (total < avail)
+ {
+ ERROR ("swap plugin: Total swap space (%"PRIi64") "
+ "is less than free swap space (%"PRIi64").",
+ total, avail);
+ sfree (s);
+ return (-1);
+ }
+
+ swap_submit ("used", total - avail, DS_TYPE_GAUGE);
+ swap_submit ("free", avail, DS_TYPE_GAUGE);
+
+ sfree (s);
+ /* #endif HAVE_SWAPCTL_TWO_ARGS */
+ #elif HAVE_SWAPCTL_THREE_ARGS
+