How can I fix a problem(Operation not permitted)?

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Hi,

Margad-Erdene. P wrote:
> ZyXEL, that connected to the /dev/ttyS0. The /etc/inittab file contains
> following line:
> s4:56:respawn:/usr/sbin/mgetty -x 9 -a -D ttyS0
> I tried to connect to the Linux, but couldn't. Following error in the
> mgetty.ttyS0:

Let me see...

> 10/03 12:58:04 yS0 CND: OK[0a]RING ** found **
> 10/03 12:58:04 yS0 cannot set controlling tty (ioctl): Operation not
> permitted

This is interesting, and should only happen if you run mgetty from the
command line (as opposed to "run from inittab"). But it is not the cause
for the next problem:

> 10/03 12:58:04 yS0 send: ATA[0d]
> 10/03 12:58:04 yS0 waiting for ``CONNECT''
> 10/03 12:58:04 yS0 got: [0d]
> 10/03 12:58:04 yS0 CND: RING[0a][0d][0a]NO CARRIER
> 10/03 12:58:04 yS0 found action string: ``NO CARRIER''

The reason for this is: "User error".

The manual CLEARLY says "DO NOT USE ATS0=1 (AUTO-ANSWER)". Nevertheless
you do:

> 10/03 12:53:28 yS0 CND: AT&FS0=1Q0&D3&C1[0d][0a]OK ** found **
      ^^^^
so what do you expect? There are good reasons why the things in the
manual are written down that way.

gert
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