Get the swap size from the backend, rather than hardcoding Linux specifics

1 files changed, 62 insertions, 0 deletions

diff --git a/src/linux/up-backend.c b/src/linux/up-backend.c
index b528c67..c12102d 100644
--- a/src/linux/up-backend.c
+++ b/src/linux/up-backend.c
@@ -460,6 +460,68 @@ out:
 }
 
 /**
+ * up_backend_get_used_swap:
+ *
+ * Return value: a percentage value
+ **/
+gfloat
+up_backend_get_used_swap (UpBackend *backend)
+{
+	gchar *contents = NULL;
+	gchar **lines = NULL;
+	GError *error = NULL;
+	gchar **tokens;
+	gboolean ret;
+	guint active = 0;
+	guint swap_free = 0;
+	guint swap_total = 0;
+	guint len;
+	guint i;
+	gfloat percentage = 0.0f;
+	const gchar *filename = "/proc/meminfo";
+
+	/* get memory data */
+	ret = g_file_get_contents (filename, &contents, NULL, &error);
+	if (!ret) {
+		egg_warning ("failed to open %s: %s", filename, error->message);
+		g_error_free (error);
+		goto out;
+	}
+
+	/* process each line */
+	lines = g_strsplit (contents, "\n", -1);
+	for (i=1; lines[i] != NULL; i++) {
+		tokens = g_strsplit_set (lines[i], ": ", -1);
+		len = g_strv_length (tokens);
+		if (len > 3) {
+			if (g_strcmp0 (tokens[0], "SwapFree") == 0)
+				swap_free = atoi (tokens[len-2]);
+			if (g_strcmp0 (tokens[0], "SwapTotal") == 0)
+				swap_total = atoi (tokens[len-2]);
+			else if (g_strcmp0 (tokens[0], "Active") == 0)
+				active = atoi (tokens[len-2]);
+		}
+		g_strfreev (tokens);
+	}
+
+	/* first check if we even have swap, if not consider all swap space used */
+	if (swap_total == 0) {
+		egg_debug ("no swap space found");
+		percentage = 100.0f;
+		goto out;
+	}
+
+	/* work out how close to the line we are */
+	if (swap_free > 0 && active > 0)
+		percentage = (active * 100) / swap_free;
+	egg_debug ("total swap available %i kb, active memory %i kb (%.1f%%)", swap_free, active, percentage);
+out:
+	g_free (contents);
+	g_strfreev (lines);
+	return percentage;
+}
+
+/**
  * up_backend_class_init:
  * @klass: The UpBackendClass
  **/