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Date: Sun, 21 Apr 2002 23:07:36 +0400
From: Nikolai Zhubr <s001@hotbox.ru>
Message-ID: <1192349996.20020421230736@hotbox.ru>
To: discuss@linmodems.org
Subject: /bin/login causes modem hangup :(
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Hi,
First of all, lots of thanks to all people who made it possible to
use soft modems with linux!
I'm not sure if my problem is right on topic, so appologise if rather
not.
I have Lucent1646-based modem and it works almost fine, but I found
one annoying issue: I can't use mgetty + /bin/login to log in by phone
because regular /bin/login causes line drop. Though, if I tell mgetty
to directly start /bin/sh or whatever, the modem remains online ok.
My config: RH 7.1, regular kernel 2.4.2-2, modem driver version 6.00.
My investigation shows that actually line drop occures in the
following place:
*** login.c: -------------------------------------------------------
        if((chown(ttyn, 0, 0) == 0) && (chmod(ttyn, TTY_MODE) == 0)) {
            tcsetattr(0,TCSAFLUSH,&ttt);
            signal(SIGHUP, SIG_IGN); /* so vhangup() wont kill us */
            vhangup();
            signal(SIGHUP, SIG_DFL); // --- The line drops here !!!
        }
             -------------------------------------------------------
I'm not familiar enough with linux to know what it means or how to
deal with it right way.
Any ideas appreciated.
(Please CC me, I'm not subscribed)
-- 
Best regards,
 Nikolai Zhubr