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Disable bogus attempt to switch from the TS_ISOPEN state to the

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TS_WOPEN state when CLOCAL is toggled from on to off while there
is no carrier.  There is no way back, and with sio there is no way
forward either (TS_ISOPEN will never be set again for the current
open).  This bug was observed in 1.1 and was fixed in 1.1.5.
This commit is contained in:
Bruce Evans 1995-02-08 22:02:02 +00:00
parent 2c3a858e68
commit a2d5fd1975
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6254
1 changed files with 3 additions and 1 deletions
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4
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 1.18 1995/01/06 14:56:42 bde Exp $
* $Id: tty.c,v 1.19 1995/01/30 06:16:59 bde Exp $
*/
#include <sys/param.h>
@ -783,8 +783,10 @@ ttioctl(tp, cmd, data, flag)
if (!ISSET(tp->t_state, TS_CARR_ON) &&
ISSET(tp->t_cflag, CLOCAL) &&
!ISSET(t->c_cflag, CLOCAL)) {
#if 0
CLR(tp->t_state, TS_ISOPEN);
SET(tp->t_state, TS_WOPEN);
#endif
ttwakeup(tp);
}
tp->t_cflag = t->c_cflag;