Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!floyd!harpo!seismo!hao!hplabs!sri-unix!salkind@nyu From: salkind%nyu@sri-unix.UUCP Newsgroups: net.unix-wizards Subject: dh soft carrier bug Message-ID: <16085@sri-arpa.UUCP> Date: Fri, 27-Jan-84 19:49:10 EST Article-I.D.: sri-arpa.16085 Posted: Fri Jan 27 19:49:10 1984 Date-Received: Sun, 5-Feb-84 14:06:07 EST Lines: 26 From: Lou SalkindSubject: dh soft carrier bug Index: sys/vaxuba/dh.c 4.2BSD Description: If the soft carrier flag for a dh line is set (dhsoftCAR), and a dm modem interrupt occurs on the line, the TS_CARR_ON flag may be cleared. This causes future reads/writes to the terminal to return EIO. Repeat-By: On a line with modem control, bring down DTR to force a modem interrupt. (This really can happen!) Fix: In dmintr(), add the declaration: register int unit; and change if (addr->dmcsr&DM_CF) { tp = &dh11[(dm<<4)+(addr->dmcsr&0xf)]; to unit = addr->dmcsr & 0xf; if (addr->dmcsr&DM_CF && (dhsoftCAR[dm]&(1<