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implement requirement to ack recipients as a sendmail check
[etc/mutt.git] / .mutt / sendmail-checks.d / ack-recipients
1 #!/bin/sh
2 #
3 # ack-recipients – require double-checking of some recipients
4 #
5 # refuse to send a mail as long as recipients listed in ~/.mutt/ack-recipients
6 # are not individually "signed-off" by adding their e-mail addresses to the
7 # X-Acked header. This header is removed from the mail before it is sent.
8 #
9 # Copyright © 2010 martin f. krafft <madduck@madduck.net>
10 # Released under the terms of the Artistic Licence 2.0
11 #
12 set -eu
13
14 CHECKLIST="$HOME/.mutt/ack-recipients"
15 HEADER=X-Acked
16 ACKED_RCPTS=$(formail -czx ${HEADER}: < $1 | tr -d ',')
17 MAILFILE="$1"; shift
18
19 ret=0
20 for r in $@; do
21   ack=0
22   # check if this recipient is in the list of acked recipients
23   for a in $ACKED_RCPTS; do [ $a = $r ] && ack=1 && break; done
24   re=$(echo $r | sed -e 's,\.,\\.,')
25   # now check if this unacked recipient needs to be acked
26   if [ $ack -eq 0 ] && grep -qi "^${re}$" "$CHECKLIST"; then
27     echo >&2 "E: will not send mail until $r has been added to the $HEADER header"
28     ret=1
29   fi
30 done
31
32 [ $ret -eq 0 ] || exit $ret
33
34 # now remove the X-Acked header from the mail
35 TMPFILE=$(tempfile -p mutt-sendmail -s .msg)
36 settrap () { trap "$@" 0 1 2 3 4 5 6 7 8 10 11 12 13 14 15; }
37 cleanup () { rm -f "$TMPFILE"; settrap -; }
38 settrap cleanup
39 formail -I ${HEADER}: < "$MAILFILE" > "$TMPFILE"
40 mv "$TMPFILE" "$MAILFILE"
41 settrap -