Fix typos, path to file which was moved and renamed and replace "which mdadm"...

Fix typos, path to file which was moved and renamed and replace "which mdadm" call to file_exist('/proc/mdstat') as we are not using mdadm in this script anyway.

server/mods-available/monitor_core_module.inc.php

@@ -69,8 +69,8 @@ class monitor_core_module {
 
 	//** Get distribution identifier
 	//** IMPORTANT!
-	//   This is the same code as in /install/install.php
-	//   So if you change it here, you also have to change it in /install/install.php!
+	//   This is the same code as in install/lib/install.lib.php
+	//   So if you change it here, you also have to change it in there!
 	//   Please do not forget to remove the swriteln(); - lines here at this file
 	function get_distname() {
 
@@ -838,11 +838,11 @@ class monitor_core_module {
 		/** The type of the data */
 		$type = 'system_update';
 
-		/* This monitoring is only available at debian or Ubuntu */
+		/* This monitoring is only available on Debian or Ubuntu */
 		if(file_exists('/etc/debian_version')) {
 
 			/*
-             * first update the "update-database"
+             * first update the "apt database"
 			*/
 			shell_exec('apt-get update');
 
@@ -914,7 +914,7 @@ class monitor_core_module {
 		}
 		else {
 			/*
-             * It is not debian/Ubuntu, so there is no data and no state
+             * It is not Debian/Ubuntu, so there is no data and no state
              *
              * no_state, NOT unknown, because "unknown" is shown as state
              * inside the GUI. no_state is hidden.
@@ -1001,16 +1001,15 @@ class monitor_core_module {
 		$type = 'raid_state';
 
 		/*
-		 * We support some RAIDS. But if we can't find any of them, we have no data
+		 * We support several RAID types, but if we can't find any of them, we have no data
 		*/
 		$state = 'no_state';
 		$data['output']= '';
 
 		/*
-		 * Check, if we have mdadm installed (software-raid)
+		 * Check, if Software-RAID is enabled
 		*/
-		system('which mdadm', $retval);
-		if($retval === 0) {
+		if(file_exists('/proc/mdstat')) {
 			/*
              * Fetch the output
 			*/
@@ -1825,4 +1824,4 @@ class monitor_core_module {
 		return $res;
 	}
 }
-?>
\ No newline at end of file
+?>