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Obtained from: an ancient patch of mine via 1.1.5

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Don't put partial PARMRK escape sequences in the input queue.  Use
MAX_INPUT = TTYHOG instead of TTYHOG directly for the maximum input
queue size.  Don't use the bogus MAX_INPUT advertised in
<sys/syslimits.h>.
This commit is contained in:
Bruce Evans 1995-07-21 14:41:43 +00:00
parent 2ef5801909
commit d83f358fa3
1 changed files with 11 additions and 3 deletions
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14
sys/kern/tty.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.c 8.8 (Berkeley) 1/21/94
* $Id: tty.c,v 1.49 1995/07/21 13:56:29 bde Exp $
* $Id: tty.c,v 1.50 1995/07/21 14:15:09 bde Exp $
*/
/*-
@ -185,6 +185,9 @@ char const char_type[] = {
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
#undef MAX_INPUT /* XXX wrong in <sys/syslimits.h> */
#define MAX_INPUT TTYHOG
/*
* Initial open of tty, or (re)entry to standard tty line discipline.
*/
@ -308,7 +311,11 @@ ttyinput(c, tp)
if (ISSET(iflag, IGNPAR))
return (0);
else if (ISSET(iflag, PARMRK)) {
parmrk: (void)putc(0377 | TTY_QUOTE, &tp->t_rawq);
parmrk:
if (tp->t_rawq.c_cc + tp->t_canq.c_cc >
MAX_INPUT - 3)
goto input_overflow;
(void)putc(0377 | TTY_QUOTE, &tp->t_rawq);
(void)putc(0 | TTY_QUOTE, &tp->t_rawq);
(void)putc(c | TTY_QUOTE, &tp->t_rawq);
goto endcase;
@ -518,7 +525,8 @@ parmrk: (void)putc(0377 | TTY_QUOTE, &tp->t_rawq);
/*
* Check for input buffer overflow
*/
if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) {
if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= MAX_INPUT) {
input_overflow:
if (ISSET(iflag, IMAXBEL)) {
if (tp->t_outq.c_cc < tp->t_hiwat)
(void)ttyoutput(CTRL('g'), tp);