systemd/test/units/TEST-78-SIGQUEUE.sh

#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -ex
set -o pipefail

if ! env --block-signal=SIGUSR1 true 2> /dev/null ; then
    echo "env tool too old, can't block signals, skipping test." >&2
    echo OK >/testok
    exit 0
fi

systemd-analyze log-level debug

UNIT="test-sigqueue-$RANDOM.service"

systemd-run -u "$UNIT" -p Type=notify -p DynamicUser=1 -- env --block-signal=SIGRTMIN+7 systemd-notify --exec --ready \; sleep infinity

systemctl kill --kill-whom=main --kill-value=4 --signal=SIGRTMIN+7 "$UNIT"
systemctl kill --kill-whom=main --kill-value=4 --signal=SIGRTMIN+7 "$UNIT"
systemctl kill --kill-whom=main --kill-value=7 --signal=SIGRTMIN+7 "$UNIT"
systemctl kill --kill-whom=main --kill-value=16 --signal=SIGRTMIN+7 "$UNIT"
systemctl kill --kill-whom=main --kill-value=32 --signal=SIGRTMIN+7 "$UNIT"
systemctl kill --kill-whom=main --kill-value=16 --signal=SIGRTMIN+7 "$UNIT"

# We simply check that six signals are queued now. There's no easy way to check
# from shell which ones those are, hence we don't check that.
P=$(systemctl show -P MainPID "$UNIT")

test "$(grep SigQ: /proc/"$P"/status | cut -d: -f2 | cut -d/ -f1)" -eq 6

systemctl stop $UNIT

systemd-analyze log-level info

touch /testok