Added mmcblk device type MMC

Added the abbreviation MMC for mmcblk devices such as SD and
microSD cards and some low budget laptops.

Changed log message from "USB bridge, no pass-through support"
to "Smart data unavailable" as no smart data could be caused by
a non USB device such as mmcblk as well as USB devices with no ATA
pass through and other devices that smartctl does not detect.

Author: PartialVolume

src/context.h

@@ -38,7 +38,8 @@ typedef enum nwipe_device_t_ {
     NWIPE_DEVICE_ATA,
     NWIPE_DEVICE_NVME,
     NWIPE_DEVICE_VIRT,
-    NWIPE_DEVICE_SAS
+    NWIPE_DEVICE_SAS,
+    NWIPE_DEVICE_MMC
 } nwipe_device_t;
 
 typedef enum nwipe_pass_t_ {

src/device.c

@@ -365,6 +365,10 @@ int check_device( nwipe_context_t*** c, PedDevice* dev, int dcount )
             strcpy( next_device->device_type_str, " SAS" );
             check_HPA = 1;
             break;
+
+        case NWIPE_DEVICE_MMC:
+            strcpy( next_device->device_type_str, " MMC" );
+            break;
     }
     if( next_device->device_is_ssd )
     {
@@ -638,6 +642,13 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, i
                             {
                                 *bus = NWIPE_DEVICE_VIRT;
                             }
+                            else
+                            {
+                                if( strstr( result, "/mmcblk" ) != 0 )
+                                {
+                                    *bus = NWIPE_DEVICE_MMC;
+                                }
+                            }
                         }
                     }
                 }
@@ -859,9 +870,9 @@ int nwipe_get_device_bus_type_and_serialno( char* device, nwipe_device_t* bus, i
 
                 if( exit_status == 1 )
                 {
-                    nwipe_log( NWIPE_LOG_WARNING, "%s USB bridge, no pass-through support", device );
+                    nwipe_log( NWIPE_LOG_WARNING, "Smartctl is unable to provide smart data for %s", device );
 
-                    if( *bus == NWIPE_DEVICE_USB )
+                    if( *bus == NWIPE_DEVICE_USB || *bus == NWIPE_DEVICE_MMC )
                     {
                         strcpy( serialnumber, "(S/N: unknown)" );
                         set_return_value = 5;