# Copyright 2021 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description   "Missive Daemon"
author        "chromium-os-dev@chromium.org"

# TODO(zatrudo): added for testing remove to allow dbus serivce activation
start on started system-services

stop on stopping system-services

respawn
respawn limit 3 10  # if the job respawns 3 times in 10 seconds, stop trying.

# Allow us to be killed as we are not critical to the system.  If we have a
# leak while collecting reports, better to crash & restart than to OOM-panic
# the system.
oom score -100
# TODO(zatrudo): Add a "limit as" after doing some runtime analysis.

# Minijail forks off the desired process.
expect fork

# Prepare directory used as storage for reports. Even though the system should
# have handled the directory during boot, here we enforce it again. See
# platform2/init/tmpfiles.d/README.
tmpfiles /usr/lib/tmpfiles.d/missived.conf

# TODO(zatrudo): Add '-S "${SECCOMP_POLICY_FILE}" \' to exec when ready
# env SECCOMP_POLICY_FILE=/usr/share/policy/missived-seccomp.policy

# -u run as user missived
# -g run as group missived
# -i exit immediately after fork (do not act as init).
# -l enter new IPC namespace
# -N enter new cgroup namespace
# -p enter new pid namespace
# -n set no_new_privs
# -t mount a new /tmp inside chroot
# -b/-k directories to mount into chroot
# -b /run/dbus: enables DBus communication
#
# /var/cache/reporting must still be mounted even though it's deprecated. See
# the comments titled {{{ Notes on /var/cache/reporting }}} in
# platform2/missived/tmpfiles.d/missived.conf for details.
exec minijail0 -u missived -g missived -i -l -N -p -n -t \
     --profile=minimalistic-mountns \
     -k '/run,/run,tmpfs,MS_NODEV|MS_NOEXEC|MS_NOSUID,mode=755,size=10M'  \
     -k '/var,/var,tmpfs,MS_NODEV|MS_NOEXEC|MS_NOSUID,mode=755,size=100M' \
     -b /var/cache/reporting,,1  \
     -b /var/spool/reporting,,1  \
     -b /var/lib/metrics,,1 \
     -b /run/dbus --uts \
     -- /usr/bin/missived

# Wait for daemon to claim its D-Bus name before transitioning to started.
post-start exec minijail0 -u missived -g missived /usr/bin/gdbus \
    wait --system --timeout 15 org.chromium.Missived