fix div by zero error when swaptotal is zero (Flo Gleixner)

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@834 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 6 insertions, 3 deletions

diff --git a/plugins/check_swap.c b/plugins/check_swap.c
index fe792e87..1155ed0e 100644
--- a/plugins/check_swap.c
+++ b/plugins/check_swap.c
@@ -73,8 +73,8 @@ main (int argc, char **argv)
         bindtextdomain (PACKAGE, LOCALEDIR);
         textdomain (PACKAGE);
 
-        status = strdup("");
-        perf = strdup("");
+        status = strdup ("");
+        perf = strdup ("");
 
         if (process_arguments (argc, argv) != OK)
                 usage (_("Invalid command arguments supplied\n"));
@@ -90,7 +90,10 @@ main (int argc, char **argv)
                         used_swap += dskused;
                         free_swap += dskfree;
                         if (allswaps) {
-                                percent = 100 * (((double) dskused) / ((double) dsktotal));
+                                if (dsktotal == 0)
+                                        percent=100.0;
+                                else
+                                        percent = 100 * (((double) dskused) / ((double) dsktotal));
                                 result = max_state (result, check_swap (percent, dskfree));
                                 if (verbose)
                                         asprintf (&status, "%s [%llu (%d%%)]", status, dskfree, 100 - percent);