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path: root/drivers/tty/vt/vt.c
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Diffstat (limited to 'drivers/tty/vt/vt.c')
-rw-r--r--drivers/tty/vt/vt.c152
1 files changed, 122 insertions, 30 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 9a8e8c5a0c7..b33b00b386d 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -735,7 +735,7 @@ static void visual_init(struct vc_data *vc, int num, int init)
vc->vc_num = num;
vc->vc_display_fg = &master_display_fg;
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
- vc->vc_uni_pagedir = 0;
+ vc->vc_uni_pagedir = NULL;
vc->vc_hi_font_mask = 0;
vc->vc_complement_mask = 0;
vc->vc_can_do_color = 0;
@@ -1164,6 +1164,8 @@ static void csi_J(struct vc_data *vc, int vpar)
scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
vc->vc_screenbuf_size >> 1);
set_origin(vc);
+ if (CON_IS_VISIBLE(vc))
+ update_screen(vc);
/* fall through */
case 2: /* erase whole display */
count = vc->vc_cols * vc->vc_rows;
@@ -1229,6 +1231,52 @@ static void default_attr(struct vc_data *vc)
vc->vc_color = vc->vc_def_color;
}
+struct rgb { u8 r; u8 g; u8 b; };
+
+struct rgb rgb_from_256(int i)
+{
+ struct rgb c;
+ if (i < 8) { /* Standard colours. */
+ c.r = i&1 ? 0xaa : 0x00;
+ c.g = i&2 ? 0xaa : 0x00;
+ c.b = i&4 ? 0xaa : 0x00;
+ } else if (i < 16) {
+ c.r = i&1 ? 0xff : 0x55;
+ c.g = i&2 ? 0xff : 0x55;
+ c.b = i&4 ? 0xff : 0x55;
+ } else if (i < 232) { /* 6x6x6 colour cube. */
+ c.r = (i - 16) / 36 * 85 / 2;
+ c.g = (i - 16) / 6 % 6 * 85 / 2;
+ c.b = (i - 16) % 6 * 85 / 2;
+ } else /* Grayscale ramp. */
+ c.r = c.g = c.b = i * 10 - 2312;
+ return c;
+}
+
+static void rgb_foreground(struct vc_data *vc, struct rgb c)
+{
+ u8 hue, max = c.r;
+ if (c.g > max)
+ max = c.g;
+ if (c.b > max)
+ max = c.b;
+ hue = (c.r > max/2 ? 4 : 0)
+ | (c.g > max/2 ? 2 : 0)
+ | (c.b > max/2 ? 1 : 0);
+ if (hue == 7 && max <= 0x55)
+ hue = 0, vc->vc_intensity = 2;
+ else
+ vc->vc_intensity = (max > 0xaa) + 1;
+ vc->vc_color = (vc->vc_color & 0xf0) | hue;
+}
+
+static void rgb_background(struct vc_data *vc, struct rgb c)
+{
+ /* For backgrounds, err on the dark side. */
+ vc->vc_color = (vc->vc_color & 0x0f)
+ | (c.r&0x80) >> 1 | (c.g&0x80) >> 2 | (c.b&0x80) >> 3;
+}
+
/* console_lock is held */
static void csi_m(struct vc_data *vc)
{
@@ -1300,21 +1348,55 @@ static void csi_m(struct vc_data *vc)
case 27:
vc->vc_reverse = 0;
break;
- case 38: /* ANSI X3.64-1979 (SCO-ish?)
- * Enables underscore, white foreground
- * with white underscore (Linux - use
- * default foreground).
+ case 38: /* ITU T.416
+ * Higher colour modes.
+ * They break the usual properties of SGR codes
+ * and thus need to be detected and ignored by
+ * hand. Strictly speaking, that standard also
+ * wants : rather than ; as separators, contrary
+ * to ECMA-48, but no one produces such codes
+ * and almost no one accepts them.
*/
- vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
- vc->vc_underline = 1;
+ i++;
+ if (i > vc->vc_npar)
+ break;
+ if (vc->vc_par[i] == 5 && /* 256 colours */
+ i < vc->vc_npar) { /* ubiquitous */
+ i++;
+ rgb_foreground(vc,
+ rgb_from_256(vc->vc_par[i]));
+ } else if (vc->vc_par[i] == 2 && /* 24 bit */
+ i <= vc->vc_npar + 3) {/* extremely rare */
+ struct rgb c = {r:vc->vc_par[i+1],
+ g:vc->vc_par[i+2],
+ b:vc->vc_par[i+3]};
+ rgb_foreground(vc, c);
+ i += 3;
+ }
+ /* Subcommands 3 (CMY) and 4 (CMYK) are so insane
+ * there's no point in supporting them.
+ */
break;
- case 39: /* ANSI X3.64-1979 (SCO-ish?)
- * Disable underline option.
- * Reset colour to default? It did this
- * before...
- */
+ case 48:
+ i++;
+ if (i > vc->vc_npar)
+ break;
+ if (vc->vc_par[i] == 5 && /* 256 colours */
+ i < vc->vc_npar) {
+ i++;
+ rgb_background(vc,
+ rgb_from_256(vc->vc_par[i]));
+ } else if (vc->vc_par[i] == 2 && /* 24 bit */
+ i <= vc->vc_npar + 3) {
+ struct rgb c = {r:vc->vc_par[i+1],
+ g:vc->vc_par[i+2],
+ b:vc->vc_par[i+3]};
+ rgb_background(vc, c);
+ i += 3;
+ }
+ break;
+ case 39:
vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0);
- vc->vc_underline = 0;
break;
case 49:
vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f);
@@ -1579,9 +1661,9 @@ static void restore_cur(struct vc_data *vc)
vc->vc_need_wrap = 0;
}
-enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
+enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
- ESpalette };
+ ESpalette, ESosc };
/* console_lock is held (except via vc_init()) */
static void reset_terminal(struct vc_data *vc, int do_clear)
@@ -1641,11 +1723,15 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
* Control characters can be used in the _middle_
* of an escape sequence.
*/
+ if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
+ return;
switch (c) {
case 0:
return;
case 7:
- if (vc->vc_bell_duration)
+ if (vc->vc_state == ESosc)
+ vc->vc_state = ESnormal;
+ else if (vc->vc_bell_duration)
kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
return;
case 8:
@@ -1756,7 +1842,9 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
} else if (c=='R') { /* reset palette */
reset_palette(vc);
vc->vc_state = ESnormal;
- } else
+ } else if (c>='0' && c<='9')
+ vc->vc_state = ESosc;
+ else
vc->vc_state = ESnormal;
return;
case ESpalette:
@@ -1796,9 +1884,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_par[vc->vc_npar] *= 10;
vc->vc_par[vc->vc_npar] += c - '0';
return;
- } else
- vc->vc_state = ESgotpars;
- case ESgotpars:
+ }
vc->vc_state = ESnormal;
switch(c) {
case 'h':
@@ -2012,6 +2098,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
vc->vc_state = ESnormal;
return;
+ case ESosc:
+ return;
default:
vc->vc_state = ESnormal;
}
@@ -3138,8 +3226,7 @@ int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
con_back = &registered_con_driver[i];
- if (con_back->con &&
- !(con_back->flag & CON_DRIVER_FLAG_MODULE)) {
+ if (con_back->con && con_back->con != csw) {
defcsw = con_back->con;
retval = 0;
break;
@@ -3244,6 +3331,7 @@ static int vt_unbind(struct con_driver *con)
{
const struct consw *csw = NULL;
int i, more = 1, first = -1, last = -1, deflt = 0;
+ int ret;
if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) ||
con_is_graphics(con->con, con->first, con->last))
@@ -3269,8 +3357,10 @@ static int vt_unbind(struct con_driver *con)
if (first != -1) {
console_lock();
- do_unbind_con_driver(csw, first, last, deflt);
+ ret = do_unbind_con_driver(csw, first, last, deflt);
console_unlock();
+ if (ret != 0)
+ return ret;
}
first = -1;
@@ -3557,17 +3647,20 @@ err:
*/
int do_unregister_con_driver(const struct consw *csw)
{
- int i, retval = -ENODEV;
+ int i;
/* cannot unregister a bound driver */
if (con_is_bound(csw))
- goto err;
+ return -EBUSY;
+
+ if (csw == conswitchp)
+ return -EINVAL;
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
struct con_driver *con_driver = &registered_con_driver[i];
if (con_driver->con == csw &&
- con_driver->flag & CON_DRIVER_FLAG_MODULE) {
+ con_driver->flag & CON_DRIVER_FLAG_INIT) {
vtconsole_deinit_device(con_driver);
device_destroy(vtconsole_class,
MKDEV(0, con_driver->node));
@@ -3578,12 +3671,11 @@ int do_unregister_con_driver(const struct consw *csw)
con_driver->flag = 0;
con_driver->first = 0;
con_driver->last = 0;
- retval = 0;
- break;
+ return 0;
}
}
-err:
- return retval;
+
+ return -ENODEV;
}
EXPORT_SYMBOL_GPL(do_unregister_con_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 11:23:04 +0000