From 27ca8d86742199683e85e77bccba68671782b13a Mon Sep 17 00:00:00 2001
From: Andy Bauer <knnniggett@hotmail.com>
Date: Tue, 21 Feb 2017 12:33:05 -0600
Subject: [PATCH 1/2] use === operator in getDiskPercent function

---
 web/includes/functions.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/web/includes/functions.php b/web/includes/functions.php
index 970a5a822..8e3f910cb 100644
--- a/web/includes/functions.php
+++ b/web/includes/functions.php
@@ -1434,12 +1434,12 @@ function getLoad() {
 
 function getDiskPercent($path = ZM_DIR_EVENTS) {
   $total = disk_total_space($path);
-  if ( ! $total ) {
+  if ( $total === false ) {
     Error("disk_total_space returned false for " . $path );
     return 0;
   }
   $free = disk_free_space($path);
-  if ( ! $free ) {
+  if ( $free === false ) {
     Error("disk_free_space returned false for " . $path );
   }
   $space = round(($total - $free) / $total * 100);

From 8759e2bdb43a66ee8595e5ffa3367860e7190043 Mon Sep 17 00:00:00 2001
From: Andy Bauer <knnniggett@hotmail.com>
Date: Tue, 21 Feb 2017 13:10:41 -0600
Subject: [PATCH 2/2] prevent divide by zero, make error messages more
 descriptive

---
 web/includes/functions.php | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/web/includes/functions.php b/web/includes/functions.php
index 8e3f910cb..82676b27d 100644
--- a/web/includes/functions.php
+++ b/web/includes/functions.php
@@ -1435,14 +1435,17 @@ function getLoad() {
 function getDiskPercent($path = ZM_DIR_EVENTS) {
   $total = disk_total_space($path);
   if ( $total === false ) {
-    Error("disk_total_space returned false for " . $path );
+    Error("disk_total_space returned false. Verify the web account user has access to " . $path );
     return 0;
+  } elseif ( $total == 0 ) {
+    Error("disk_total_space indicates the following path has a filesystem size of zero bytes" . $path );
+    return 100;
   }
   $free = disk_free_space($path);
   if ( $free === false ) {
-    Error("disk_free_space returned false for " . $path );
+    Error("disk_free_space returned false. Verify the web account user has access to " . $path );
   }
-  $space = round(($total - $free) / $total * 100);
+  $space = round((($total - $free) / $total) * 100);
   return( $space );
 }