hmm... Based on Philipps idea I have modified my script as follows:
#!/bin/bash
cat - > /tmp/notfallemail
from=`cat /tmp/notfallemail | head -n 50 | grep -i ^From`
from=${from// /+}
subject=`cat /tmp/notfallemail | head -n 50 | grep -i ^Subject`
subject=${subject// /+}
out=`curl -g
"https://smsgw01/cgi-bin/sms_send?text=Neue+Notfall+Email+von+$from+mit+Betreff+$subject"`
exit 0
Stdin works. The SMS message now contains the From and the Subject header.
However, OpenSMTPd still complains with "mda exited prematurely".
If I however change the script to the following, while the message OpenSMTPd
complains about is still in the queue and pending
#!/bin/bash
cat - > /dev/null
out=`curl -g "https://smsgw01/cgi-bin/sms_send?text=Neue+Notfall+Email"`
exit 0
and then issue smtpctl schedule all, then OpenSMTPd reports a successful
delivery and removes the mail from the queue.
Any ideas?
Thanks!
Cheers,
Simon
Philipp wrote:
> Hi Simon
>
> [2024-03-05 10:49] Simon Hoffmann <open...@list.simonhoffmann.net>
> > in my virtual users file, I have specified an external script additionally
> > to
> > delivery to mailboxes.
> >
> >
> > emerge...@domain.tld user1,user2,|/etc/smtpd/send_sms.sh
> >
> > Local delivery to the mailboxes works fine.
> > The script itself is called as well as I do receive the SMS message.
> >
> > However, OpenSMTPd says "MDA exited prematurely" after calling the script,
> > thus
> > leading to a TEMPFAIL and OpenSMTPd trying again periodically.
>
> This means your script exited while OpenSMTPd still has (parts of) the
> mail in the output buffer.
>
> > [...]
> >
> > The send_sms.sh script consists of a static curl call at the moment, that
> > performs a
> > HTTP Get call to the SMS Gateway with the static text "new emergency mail
> > received".
> > I am not yet parsing sender/subject etc.
>
> I would guess that you don't read stdin at all.
>
> > Sadly, I could find nothing on the man pages as to which exit codes
> > OpenSMTPd expects
> > from an mda script. Additionally, based on the documentation available, I
> > am not sure
> > if OpenSMTPd just pipes the whole message into stdin or if OpenSMTPd
> > expects some
> > form of "smtp communication" (MAIL FROM + response, RCPT TO + response,
> > ....) and
> > thus comlains that my script exits prematurely because I have not
> > implemented
> > that.
>
> smtpd pipes the mail to stdin and expect your script to read it.
>
> > So, long story short: how shall I modify my script so that OpenSMTPd
> > recognises that
> > the SMS Gateway received the call and has queued the SMS?
>
> A simple line "cat - > /dev/null" should fix it.
>
> Philipp
>
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