Correct issue #346 if drive is removed during the FS grab

conf/glances-monitor.conf

@@ -106,7 +106,7 @@ mem_critical=90
 list_1_description=Dropbox
 list_1_regex=.*dropbox.*
 list_1_countmin=1
-list_1_command=dropbox status
+list_1_command=dropbox status | head -1
 list_2_description=Python programs
 list_2_regex=.*python.*
 list_3_description=Famous Xeyes

glances/plugins/glances_fs.py

@@ -59,7 +59,12 @@ class glancesGrabFs:
             fs_current['fs_type'] = fs_stat[fs].fstype
             fs_current['mnt_point'] = fs_stat[fs].mountpoint
             # Grab the disk usage
+            try:
                 fs_usage = psutil.disk_usage(fs_current['mnt_point'])
+            except OSError:
+                # Correct issue #346
+                # Disk is ejected during the command
+                continue
             fs_current['size'] = fs_usage.total
             fs_current['used'] = fs_usage.used
             fs_current['avail'] = fs_usage.free