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- Path: sparky!uunet!olivea!spool.mu.edu!wupost!csus.edu!netcom.com!james
- From: james@netcom.com (James L. Paul)
- Newsgroups: comp.os.linux
- Subject: High Speed Modems and getty
- Keywords: getty, modems, SIGHUP, IOCTL
- Message-ID: <-qwn96l.james@netcom.com>
- Date: 12 Sep 92 14:46:20 GMT
- Organization: Netcom
- Lines: 45
-
- I'm using 0.97.2 and uugetty from the getty_ps203 package. I've never
- turned on the debugging, and it answers the ring fine, and sets speeds
- properly. However, I'm still struggling with 2 problems...
-
- 1. Apparently, my problem with the shell not getting a SIGHUP was
- related to the CLOCAL in my default /etc/gettydefs. I removed the
- CLOCAL and now my shell gets the SIGHUP. SOMETIMES!!! If there are
- any child processes, nothing dies at all, including the shell, and
- I have to kill them off by hand. When I manually kill a shell in this
- situation, then uugetty is automatically respawned immediately.
-
- Basically, if a user is running anything and not just sitting in the
- shell when modem connection is lost, that tty is unavailable until I
- correct this problem manually.
-
- 2. I can reliably use my modem at 19.2k bps with xcomm, etc. and do this
- regularly. My ports are 16550A, and I have yet to see a single zmodem
- fault when using xcomm. However, 19.2k is unreliable for gettys. When
- logged in via a 19.2k getty, simple keyboard and terminal operations
- work fine, but file transfers are out of the question. I have to use
- 9600 if I want any serious traffic via a getty line.
-
- So, the overhead involved with being logged in on a port is enough to
- knock the speed back one notch, at least in my case. I'm disappointed,
- since it's obvious my ports are fast enough, and it's just a matter of
- kernel overhead. (I assume.) Since I'm running a slow CPU, I'm just
- pointing this out, not complaining. I'll bet something faster than 16MHz
- would help make up the difference. ;)
-
- 3. Now, a final tack-on question...
-
- Where is an accurate source of IOCTL info, so I can examine all the
- possible flags for my /etc/gettydefs? I suspect some of my problems
- might be fixable with flags, but have been unable to find the right
- set of man pages. (For example, I have no idea what CLOCAL does, but
- removing it from the first entry half-solved a problem! Perhaps adding
- some flag may solve the other half! ;)
-
- --
- James L. Paul
-
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