kernel: vcons: Support ASCII_BS for backspace

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/dev/vcons/vcons_io.c b/sys/dev/vcons/vcons_io.c
index 4c0151a..f4e693e 100644
--- a/sys/dev/vcons/vcons_io.c
+++ b/sys/dev/vcons/vcons_io.c
@@ -69,6 +69,12 @@ vcons_process_output(struct vcons_screen *scr, int c)
     case ASCII_HT:
         vcons_expand_tab(scr);
         break;
+    case ASCII_BS:
+        if (cursor->xpos > 0) {
+            scr->cpy_x--;
+            cursor->xpos -= FONT_WIDTH;
+        }
+        break;
     default:
         return -1;
     }