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os: fix 'CUU' terminal command 

Decrement the y position to move the cursor up.

Fixes #3379
This commit is contained in:
Christian Prochaska 2019-05-25 19:22:22 +02:00 committed by Christian Helmuth
parent d417d26ce8
commit f99a1d78bb
1 changed files with 1 additions and 1 deletions
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2
repos/os/include/terminal/char_cell_array_character_screen.h
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@ -318,7 +318,7 @@ class Char_cell_array_character_screen : public Terminal::Character_screen
{
Cursor_guard guard(*this);
_cursor_pos.x += dy;
_cursor_pos.y -= dy;
_cursor_pos.y = Genode::max(0, _cursor_pos.y);
}