Viktor Dukhovni:
>
> > On Dec 22, 2016, at 3:51 AM, St?phane MERLE <stephane.me...@distrigame.com>
> > wrote:
> >
> > First, I save the message in the file descriptor 3
> >
> > msg=$(mktemp /tmp/msg.XXXXXX) || exit 75
> > cat > $msg || { rm $msg; exit 75; }
> > exec 3< $msg || { rm $msg; exit 75; }
> > rm $msg
> >
> > then I use it by rewinding it :
> >
> > perl -e 'open IN, "<&", 3; seek(IN, 0, 0);'
>
> I meant to use "sysseek" there, not "seek" by the way, though
> in practice it seems that "seek" has the same effect, the former
> is more correct.
>
> >
> > is there a way to rewind without using perl ?
>
> If you need to avoid tools like Perl that expose system call
> interfaces, just go with the "trap" approach and don't "pre-unlink"
> the message file.
>
> msg=$(mktemp /tmp/msg.XXXXXX)
> trap "rm -f $msg" EXIT
> trap "rm -f $msg; exit 75" HUP INT TERM
> cat > $msg
>
> ...
> if grep "..." $msg >/dev/null; then
> set -- "$@" "$additional_recipient"
> fi
> ...
>
> # Final command. Shell will remove the temp file and exit with
> # Sendmail's exit code.
> /usr/sbin/sendmail "$@"
And do not forget the '--' in
pipe ... argv=/path/to/script -f ${sender} -- ${recipient}
Wietse
