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|
#!/bin/bash
set +e
verwendung() {
>&2 echo 'digest-mailer collects emails into digests before sending them.'
>&2 echo ''
>&2 echo 'Usage: digest-mailer [OPTIONS]'
>&2 echo \
'#HELPTEXT# #'
exit 1
}
if [ "x$1" = 'x--help' ]; then
verwendung
fi
if [ "x$1" = 'x--version' ]; then
echo '#VERSION#'
exit
fi
if [ $# -ne 0 ]; then
verwendung
fi
min_delay=3600
max_delay=3600
agressivity=0
mail_cmd='sendmail -t'
if [ -r #ETCDIR#/digest-mailer.conf ]
then
. #ETCDIR#/digest-mailer.conf
fi
message=$(
cat
)
sender=$(
whoami | \
sha224sum | \
awk '{print $1}'
)
receiver=$(
printf '%s\n' "${message}" | \
sed -n '
/^$/q
s/^To:\s*//
T
p
' | \
sha224sum | \
awk '{print $1}'
)
time=$(
date +%s
)
hash=$(
printf '%s' "${message}" | \
sha224sum | \
awk '{print $1}'
)
if [ -s "#LIBDIR#/digest-mailer/${sender}.${receiver}.last-sent" ]; then
last_sent=$(
cat "#LIBDIR#/digest-mailer/${sender}.${receiver}.last-sent"
)
else
last_sent='0'
fi
printf '%s' "${message}" > "#LIBDIR#/digest-mailer/${sender}.${receiver}.${time}.${hash}"
first_unsent=$(
find '#LIBDIR#/digest-mailer' -regextype grep -maxdepth 1 -mindepth 1 \
-regex ".*/${sender}\.${receiver}\.[0-9]\+\.[0-9a-f]\+\$" \
-printf '%f\n' | \
cut -d. -f3 | \
sort -nr | \
tail -n1
)
to_send=$(
find '#LIBDIR#/digest-mailer' -regextype grep -maxdepth 1 -mindepth 1 \
-regex ".*/${sender}\.${receiver}\.[0-9]\+\.[0-9a-f]\+\$" | \
sort
)
to_send_count=$(
printf '%s\n' "${to_send}" | \
wc -l
)
if [ $((last_sent + min_delay)) -gt ${time} ]; then
# last email was sent too close
exit
fi
if [ ${to_send_count} -gt 1 ] && \
[ $(printf 'scale=10; (%s+%s)*%s + (%s+%s)*(1-%s)\n' "${min_delay}" "${last_sent}" "${agressivity}" "${max_delay}" "${first_unsent}" "${agressivity}" | bc) -gt ${time} ] && \
[ $((first_unsent + max_delay)) -ge ${time} ]; then
exit
fi
printf '%s' "${time}" > "#LIBDIR#/digest-mailer/${sender}.${receiver}.last-sent"
if [ ${to_send_count} -eq 1 ]; then
${mail_cmd} < "${to_send}"
rm "${to_send}"
exit
fi
{
sed -n '
/^$/q
s/^Subject:.*$/Subject: mail-digest/
' "$(
printf '%s' "${to_send}" | \
head -n1
)"
printf '\n'
printf '%s\n' "${to_send}" | \
while read -r file; do
cat "${file}"
printf '\n'
rm "${file}"
done
} | ${mail_cmd}
|
