mgetty isn't answering the phone (ioctl problem)
I'm trying to get mgetty to answer an incoming call on a data line.
I'm running "mgetty -x 4 -D /dev/ttyS0" and it waits on the line until I
call in (I'm running it explicitly from the cmdline as root until I can
figure the problem out). On the first ring, it dumps me back to the
command prompt. When I call from a normal phone, I hear a ring, a click,
another click, and then that's it.
A peek at /var/log/mgetty/mg_ttyS0.log shows:
>10/22 16:41:48 yS0 lowering DTR to reset Modem
>10/22 16:41:48 yS0 send: \d\d\d+++\d\d\d[0d]\dATQ0V1H0[0d]
>10/22 16:41:52 yS0 waiting for ``OK'' ** found **
>10/22 16:41:52 yS0 send: AT[0d]
>10/22 16:41:52 yS0 waiting for ``OK'' ** found **
>10/22 16:41:53 yS0 waiting...
>10/22 16:42:03 yS0 waiting for ``RING'' ** found **
>10/22 16:42:03 yS0 cannot set controlling tty (ioctl): Operation not
permitted
>10/22 16:42:03 yS0 send: ATA[0d]
>10/22 16:42:03 yS0 waiting for ``CONNECT''
>10/22 16:42:03 yS0 found action string: ``NO CARRIER''
>10/22 16:42:03 ##### failed A_FAIL dev=ttyS0, pid=17138, caller=none,
conn='', name=''
Notice the "cannot set controlling tty (ioctl): Operation not permitted".
Suspecting a permission problem, I did an "ls -l /dev/ttyS*" and that
turned up:
>crw-rw-r-- 1 root dialout 4, 64 Oct 22 15:39 ttyS0
>crw-rw---- 1 root tty 4, 65 Dec 31 1969 ttyS1
>crw-rw---- 1 root tty 4, 66 Dec 31 1969 ttyS2
>crw-rw---- 1 root tty 4, 67 Dec 31 1969 ttyS3
I changed the group ownership of ttyS0 to "tty", but that didn't help.
Any ideas?
- Joe
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