I thought that was understood to be the reason.
Probably opening fifo should also help (in place of
running in nodaemon mode) since it keeps one file descriptor
(am I right ?)
On Thu, 21 Oct 1999, Ed G. wrote:
> Umm, could this possibly be the source of your problem?
>
> Ed G.
>
> PS: a simple workaround is run in diald in non-daemon mode, i.e.,
> include -daemon in your diald.conf file.
>
> ------- Forwarded Message Follows -------
> From: "Ed G." <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Date sent: Thu, 7 Oct 1999 20:12:25 -0400
> Subject: chat fails due to diald bug?
> Send reply to: [EMAIL PROTECTED]
> Copies to: [EMAIL PROTECTED]
>
> On my setup (LRP 2.9.4 running diald-99-1 and kernel 2.2.11), chat
> works fine when slip is the proxy device, but fails when using
> ethertap:
>
> Oct 7 16:39:10 myrouter2 diald[538]: running '/usr/sbin/chat -v -f
> /etc/chatscripts/provider'
> Oct 7 16:39:10 myrouter2 chat[556]: Can't get terminal
> parameters: Invalid argument
> Oct 7 16:39:10 myrouter2 diald[538]: SIGCHLD[4]: pid 555 dial,
> status 512
> Oct 7 16:39:10 myrouter2 diald[538]: Connect script failed.
>
> strace shows chat dying when it is unable to open STDIN (file
> descriptor zero):
>
> 556 <chat> 16:39:10 ioctl(0, TCGETS, 0xbffffcf8) = -1 EINVAL
> (Invalid argument)
> 556 <chat> 16:39:10 send(2, "<147>Oct 7 16:39:10 chat[556
> <chat>]: "..., 80, 0) = 80
> 556 <chat> 16:39:10 sigaction(SIGPIPE, {SIG_DFL}, NULL) = 0
> 556 <chat> 16:39:10 _exit(2) = ?
>
> It seems diald is inadvertently closing the modem fd in run_shell
> before it starts chat. Function run_shell closes closes file
> descriptors 0, 1 and 2 (STDIN, STDOUT and STDERR) and then
> creates new file descriptors for STDIN and STDOUT pointing to the
> modem.
>
> The assumption appears to be that the modem fd will never be less
> than 3.
>
> Unfortunately, this appears not to be the case.
>
> strace shows diald returning a file descriptor of 2 for the modem
> when ethertap is loaded:
>
> 538 <diald> 16:39:09 open("/dev/ttyS0",
> O_RDWR|O_NONBLOCK) = 2
>
>
>
>
>
>
>
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