From 29978fae6b61969a706181d863e5d32f0ff6b8b8 Mon Sep 17 00:00:00 2001
From: octo <octo>
Date: Fri, 28 Apr 2006 16:21:19 +0000
Subject: [PATCH] A first port of the `swap' plugin to Mach/Mac OS X

---
 src/swap.c | 76 ++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 62 insertions(+), 14 deletions(-)

diff --git a/src/swap.c b/src/swap.c
index 08915032..e8f05d65 100644
--- a/src/swap.c
+++ b/src/swap.c
@@ -24,18 +24,24 @@
 #include "common.h"
 #include "plugin.h"
 
+#if HAVE_SYS_SWAP_H
+# include <sys/swap.h>
+#endif
+#if HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+#endif
+#if HAVE_SYS_SYSCTL_H
+#  include <sys/sysctl.h>
+#endif
+
 #define MODULE_NAME "swap"
 
-#if defined(KERNEL_LINUX) || defined(KERNEL_SOLARIS) || defined(HAVE_LIBSTATGRAB)
+#if KERNEL_LINUX || HAVE_LIBKSTAT || HAVE_SYS_SYSCTL_H || HAVE_LIBSTATGRAB
 # define SWAP_HAVE_READ 1
 #else
 # define SWAP_HAVE_READ 0
 #endif
 
-#if HAVE_SYS_SWAP_H
-# include <sys/swap.h>
-#endif
-
 #undef  MAX
 #define MAX(x,y) ((x) > (y) ? (x) : (y))
 
@@ -52,19 +58,43 @@ static char *ds_def[] =
 };
 static int ds_num = 4;
 
-#ifdef KERNEL_SOLARIS
+#if KERNEL_LINUX
+/* No global variables */
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_LIBKSTAT
 static int pagesize;
 static kstat_t *ksp;
-#endif /* KERNEL_SOLARIS */
+/* #endif HAVE_LIBKSTAT */
+
+#elif HAVE_SYS_SYSCTL_H
+/* No global variables */
+/* #endif HAVE_SYS_SYSCTL_H */
+
+#elif HAVE_LIBSTATGRAB
+/* No global variables */
+#endif /* HAVE_LIBSTATGRAB */
 
 static void swap_init (void)
 {
-#ifdef KERNEL_SOLARIS
+#if KERNEL_LINUX
+	/* No init stuff */
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_LIBKSTAT
 	/* getpagesize(3C) tells me this does not fail.. */
 	pagesize = getpagesize ();
 	if (get_kstat (&ksp, "unix", 0, "system_pages"))
 		ksp = NULL;
-#endif /* KERNEL_SOLARIS */
+/* #endif HAVE_LIBKSTAT */
+
+#elif HAVE_SYS_SYSCTL_H
+	/* No init stuff */
+/* #endif HAVE_SYS_SYSCTL_H */
+
+#elif HAVE_LIBSTATGRAB
+	/* No init stuff */
+#endif /* HAVE_LIBSTATGRAB */
 
 	return;
 }
@@ -91,7 +121,7 @@ static void swap_submit (unsigned long long swap_used,
 
 static void swap_read (void)
 {
-#ifdef KERNEL_LINUX
+#if KERNEL_LINUX
 	FILE *fh;
 	char buffer[1024];
 	
@@ -139,9 +169,9 @@ static void swap_read (void)
 	swap_used = swap_total - (swap_free + swap_cached);
 
 	swap_submit (swap_used, swap_free, swap_cached, -1LL);
-/* #endif defined(KERNEL_LINUX) */
+/* #endif KERNEL_LINUX */
 
-#elif defined(KERNEL_SOLARIS)
+#elif HAVE_LIBKSTAT
 	unsigned long long swap_alloc;
 	unsigned long long swap_resv;
 	unsigned long long swap_avail;
@@ -182,9 +212,27 @@ static void swap_read (void)
 	/* swap_free  = pagesize * (ai.ani_free + (availrmem - swapfs_minfree)); */
 
 	swap_submit (swap_alloc, swap_avail, -1LL, swap_resv - swap_alloc);
-/* #endif defined(KERNEL_SOLARIS) */
+/* #endif HAVE_LIBKSTAT */
+
+#elif HAVE_SYS_SYSCTL_H
+	int mib[2];
+	struct xsw_usage sw_usage;
+	size_t           sw_usage_len;
+
+	mib[0] = CTL_VM;
+	mib[1] = VM_SWAPUSAGE;
+
+	sw_usage_len = sizeof (struct xsw_usage);
+
+	if (sysctl (mib, 2, &sw_usage, &sw_usage_len, NULL, 0) != 0)
+		return;
+
+	/* FIXME: If this doesn't return the right values, try multiplying it
+	 * with sw_usage.xsu_pagesize.  -octo */
+	swap_submit (sw_usage.xsu_used, sw_usage.xsu_avail, -1LL, -1LL);
+/* #endif HAVE_SYS_SYSCTL_H */
 
-#elif defined(HAVE_LIBSTATGRAB)
+#elif HAVE_LIBSTATGRAB
 	sg_swap_stats *swap;
 
 	if ((swap = sg_get_swap_stats ()) != NULL)
-- 
2.30.2