diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-03-24 10:43:26 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-06-01 00:30:25 +0100 |
| commit | 303f7c4c27da1ba0d54c62eb1ae66330bc1c835e (patch) | |
| tree | 009f7b8370834df34a039f5530b037883d4fded2 | |
| parent | bd7c606e6724adc01009d8551b7666a8bcb64a5c (diff) | |
| download | linux-303f7c4c27da1ba0d54c62eb1ae66330bc1c835e.tar.gz linux-303f7c4c27da1ba0d54c62eb1ae66330bc1c835e.tar.bz2 linux-303f7c4c27da1ba0d54c62eb1ae66330bc1c835e.zip | |
tty: vt: fix up tabstops properly
commit f1869a890cdedb92a3fab969db5d0fd982850273 upstream.
Tabs on a console with long lines do not wrap properly, so correctly
account for the line length when computing the tab placement location.
Reported-by: James Holderness <j4_james@hotmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/tty/vt/vt.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 306f844db714..0dd569212f0d 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1676,7 +1676,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear) default_attr(vc); update_attr(vc); - vc->vc_tab_stop[0] = 0x01010100; + vc->vc_tab_stop[0] = vc->vc_tab_stop[1] = vc->vc_tab_stop[2] = vc->vc_tab_stop[3] = @@ -1715,7 +1715,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_pos -= (vc->vc_x << 1); while (vc->vc_x < vc->vc_cols - 1) { vc->vc_x++; - if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) + if (vc->vc_tab_stop[7 & (vc->vc_x >> 5)] & (1 << (vc->vc_x & 31))) break; } vc->vc_pos += (vc->vc_x << 1); @@ -1775,7 +1775,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) lf(vc); return; case 'H': - vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); + vc->vc_tab_stop[7 & (vc->vc_x >> 5)] |= (1 << (vc->vc_x & 31)); return; case 'Z': respond_ID(tty); @@ -1968,7 +1968,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) return; case 'g': if (!vc->vc_par[0]) - vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); + vc->vc_tab_stop[7 & (vc->vc_x >> 5)] &= ~(1 << (vc->vc_x & 31)); else if (vc->vc_par[0] == 3) { vc->vc_tab_stop[0] = vc->vc_tab_stop[1] = |