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n_tty: Fix handling of control characters and continuations

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Fix process_output_block to detect continuation characters correctly
and to handle control characters even when O_OLCUC is enabled.  Make
similar change to do_output_char().

Signed-off-by: Joe Peterson <joe@skyrush.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Peterson 2009-01-02 13:43:25 +00:00 committed by Linus Torvalds
parent fc6f623822
commit a59c0d6f14
1 changed files with 15 additions and 9 deletions
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24
drivers/char/n_tty.c
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@ -351,10 +351,12 @@ static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
tty->column--;
break;
default:
if (O_OLCUC(tty))
c = toupper(c);
if (!iscntrl(c) && !is_continuation(c, tty))
tty->column++;
if (!iscntrl(c)) {
if (O_OLCUC(tty))
c = toupper(c);
if (!is_continuation(c, tty))
tty->column++;
}
break;
}
@ -425,7 +427,9 @@ static ssize_t process_output_block(struct tty_struct *tty,
nr = space;
for (i = 0, cp = buf; i < nr; i++, cp++) {
switch (*cp) {
unsigned char c = *cp;
switch (c) {
case '\n':
if (O_ONLRET(tty))
tty->column = 0;
@ -447,10 +451,12 @@ static ssize_t process_output_block(struct tty_struct *tty,
tty->column--;
break;
default:
if (O_OLCUC(tty))
goto break_out;
if (!iscntrl(*cp))
tty->column++;
if (!iscntrl(c)) {
if (O_OLCUC(tty))
goto break_out;
if (!is_continuation(c, tty))
tty->column++;
}
break;
}
}