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console: add question-mark escape operator 

Some termcaps (found using SLES11SP1) use [? sequences. According to man
console_codes (http://linux.die.net/man/4/console_codes) the question mark
is a nop and should simply be ignored.

This patch does exactly that, rendering screen output readable when
outputting guest serial consoles to the graphical console emulator.

Signed-off-by: Alexander Graf <agraf@suse.de>
Message-id: 20170829113818.42482-1-agraf@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Alexander Graf 2017-08-29 13:38:18 +02:00 committed by Gerd Hoffmann
parent 1540008629
commit 7c336f9fe5
1 changed files with 2 additions and 1 deletions
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3
ui/console.c
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@ -880,8 +880,9 @@ static void console_putchar(QemuConsole *s, int ch)
} else {
if (s->nb_esc_params < MAX_ESC_PARAMS)
s->nb_esc_params++;
if (ch == ';')
if (ch == ';' || ch == '?') {
break;
}
trace_console_putchar_csi(s->esc_params[0], s->esc_params[1],
ch, s->nb_esc_params);
s->state = TTY_STATE_NORM;