mountmgr: Return a copy of the strings in query_dos_device.

dlls/mountmgr.sys/device.c

@@ -807,8 +807,7 @@ NTSTATUS remove_dos_device( int letter, const char *udi )
 }
 
 /* query information about an existing dos drive, by letter or udi */
-NTSTATUS query_dos_device( int letter, enum device_type *type,
-                           const char **device, const char **mount_point )
+NTSTATUS query_dos_device( int letter, enum device_type *type, char **device, char **mount_point )
 {
     struct dos_drive *drive;
     struct disk_device *disk_device;
@@ -818,8 +817,8 @@ NTSTATUS query_dos_device( int letter, enum device_type *type,
         if (drive->drive != letter) continue;
         disk_device = drive->volume->device;
         if (type) *type = disk_device->type;
-        if (device) *device = disk_device->unix_device;
-        if (mount_point) *mount_point = disk_device->unix_mount;
+        if (device) *device = strdupA( disk_device->unix_device );
+        if (mount_point) *mount_point = strdupA( disk_device->unix_mount );
         return STATUS_SUCCESS;
     }
     return STATUS_NO_SUCH_DEVICE;

dlls/mountmgr.sys/mountmgr.c

@@ -276,7 +276,7 @@ static NTSTATUS query_unix_drive( const void *in_buff, SIZE_T insize,
 {
     const struct mountmgr_unix_drive *input = in_buff;
     struct mountmgr_unix_drive *output = out_buff;
-    const char *device, *mount_point;
+    char *device, *mount_point;
     int letter = tolowerW( input->letter );
     NTSTATUS status;
     DWORD size, type = DEVICE_UNKNOWN;
@@ -314,7 +314,8 @@ static NTSTATUS query_unix_drive( const void *in_buff, SIZE_T insize,
             output->type = type;
             iosb->Information = FIELD_OFFSET( struct mountmgr_unix_drive, type ) + sizeof(output->type);
         }
-        return STATUS_MORE_ENTRIES;
+        status = STATUS_MORE_ENTRIES;
+        goto done;
     }
     output->size = size;
     output->letter = letter;
@@ -341,7 +342,10 @@ static NTSTATUS query_unix_drive( const void *in_buff, SIZE_T insize,
            letter, debugstr_a(device), debugstr_a(mount_point), type );
 
     iosb->Information = ptr - (char *)output;
-    return STATUS_SUCCESS;
+done:
+    RtlFreeHeap( GetProcessHeap(), 0, device );
+    RtlFreeHeap( GetProcessHeap(), 0, mount_point );
+    return status;
 }
 
 /* handler for ioctls on the mount manager device */

dlls/mountmgr.sys/mountmgr.h

@@ -57,8 +57,7 @@ extern NTSTATUS remove_volume( const char *udi );
 extern NTSTATUS add_dos_device( int letter, const char *udi, const char *device,
                                 const char *mount_point, enum device_type type, const GUID *guid );
 extern NTSTATUS remove_dos_device( int letter, const char *udi );
-extern NTSTATUS query_dos_device( int letter, enum device_type *type,
-                                  const char **device, const char **mount_point );
+extern NTSTATUS query_dos_device( int letter, enum device_type *type, char **device, char **mount_point );
 extern NTSTATUS WINAPI harddisk_driver_entry( DRIVER_OBJECT *driver, UNICODE_STRING *path );
 
 /* mount point functions */