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imap-download: fix fetchmail (we think)

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This commit is contained in:
Starbeamrainbowlabs 2021-05-26 00:33:35 +01:00
parent 2380e84985
commit ec583792d3
Signed by: sbrl
GPG key ID: 1BE5172E637709C2
2 changed files with 30 additions and 7 deletions
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6
images/imap-download/Dockerfile
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@ -6,7 +6,8 @@ FROM ${REPO_LOCATION}minideb
RUN install_packages ca-certificates fetchmail procmail inotify-tools mpack
RUN mkdir /srv/home \
&& ln -s /mnt/fetchmailrc /srv/home/.fetchmailrc \
&& mkdir /tmp/maildir
&& mkdir /tmp/maildir \
&& useradd --system --home=/srv/home --uid=10000 --gid=10000 fetchmail
ENV HOME /srv/home
@ -23,7 +24,4 @@ VOLUME /mnt/output
# idle
# ssl
USER 10000:10000
ENTRYPOINT [ "/srv/run.sh" ]

31
images/imap-download/run.sh
View file

@ -1,5 +1,12 @@
#!/usr/bin/env bash
dir_newmail="/tmp/maildir/Mail/new";
target_dir="/mnt/output";
fetchmail_uid="$(id -u "fetchmail")";
fetchmail_gid="$(id -g "fetchmail")";
temp_dir="$(mktemp --tmpdir -d "imap-download-XXXXXXX")";
on_exit() {
rm -rf "${temp_dir}";
@ -7,15 +14,33 @@ on_exit() {
trap on_exit EXIT;
do_fetchmail() {
fetchmail --mda "/usr/bin/procmail -m /srv/procmail.conf";
log_msg "Starting fetchmail";
while :; do
# Ref https://github.com/SinusBot/docker/pull/40
# WORKAROUND for `setpriv: libcap-ng is too old for "all" caps`, previously "-all" was used here
# create a list to drop all capabilities supported by current kernel
cap_prefix="-cap_";
caps="$cap_prefix$(seq -s ",$cap_prefix" 0 "$(cat /proc/sys/kernel/cap_last_cap)")";
setpriv --inh-caps="${caps}" --reuid "${fetchmail_uid}" --clear-groups --regid "${fetchmail_gid}" fetchmail --mda "/usr/bin/procmail -m /srv/procmail.conf";
exit_code="$?";
if [[ "$exit_code" -eq 127 ]]; then
log_msg "setpriv failed, exiting with code 127";
exit 127;
fi
log_msg "Fetchmail exited with code ${exit_code}, sleeping 60 seconds";
sleep 60
done
}
log_msg() {
echo "$(date -u +"%Y-%m-%d %H:%M:%S") imap-download: $*";
}
dir_newmail="/tmp/maildir/Mail/new";
target_dir="/mnt/output";
mkdir -p "${dir_newmail}";
do_attachments() {
while :; do # : = infinite loop