Re: [opensuse] cron job email attachment.bin

Sandy Drobic wrote:
Dave Howorth wrote:
I've attached a complete message. I can only see 7-bit characters and
the only control characters I can see are TAB and NL. I really hope you
can see something else, because I'm going mad!

I can't see anything though it doesn't mean there wasn't anything in it
befor you decided to attach it. For example, in you mail there are not
tabs any more, they are replaced with spaces.

I'm subscribed to this list at home as well, and the file that arrived
there still had the tabs, so I suspect it did when it arrived at your
site too :P The only place they occur is in the Received header lines.

I see, a man of principles. In that case you might want to investigate
the programs that are called in cron. cron does not control what these
programs write to standard out, so it is reasonable to assume that some
programs will produce output that causes nail to regard the text as not
ascii7.

As well as the principle, I want to eliminate a potential bug. This was
working fine for a long time and has suddenly broken, apparently of its
own accord. So I want to find out what has really changed in case it is
having some other undesirable effect.

Someone more savvy might see a way, but at least I can't tell you how
cron should be able to control, what kind of characters the called
programs write to standard out. Though I strongly suspect that it is
simply not possible.

I've looked at the source of nail now and am pretty convinced that it's
not to blame. And I agree with you that it doesn't seem like cron should
be held responsible.

Carlos E. R. wrote:
Well, cron uses the system "mail" command, which was changed not long
ago to "nail" (perhaps with 9.2, maybe 9.1). I understand that 10.2
has changed again to a new one, mailx
(<http://heirloom.sourceforge.net/mailx.html>), which seems to be the
new name or version of "nail".

I found the history <http://heirloom.sourceforge.net/mailx_history.html>
fascinating. Thanks!

Perhaps the OP could try updating it, to see if it behaves
differently.

Thanks for the suggestion, but I think that would just introduce another
variable into a situation that already has enough. I prefer to
investigate the current nail and the actual data files.

| (/usr/lib/cron/run-crons is the script that actually create and
| sends the mail, I think:
| if [ -n "${STATUS}" -o "$SEND_MAIL_ON_NO_ERROR" = true ] ; then
| mail ${SEND_TO} -s "${TITLE}" < ${CONTROL_MAIL}
| fi
| )

So, the text to be mailed is piped to the standard input. If it could
be given as a file via command, we could play with the filename
extension to change the mime type used by nail. But I don't see how
to do that.

/usr/lib/cron/run-crons uses temporary files to cache the output from
the scripts that it runs. I've hacked it so it doesn't delete them
afterwards. Tomorrow morning, I should be able to see exactly what was
produced by the scripts before it gets mangled by the mail system.

Thanks, Sandy & Carlos.

Dave
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