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#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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systemd-analyze log-level debug
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Start a test process inside of our own cgroup
sleep infinity &
INTERNALPID = $!
disown
# Start a test process outside of our own cgroup
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systemd-run -p DynamicUser = 1 --unit= test20-sleep.service /bin/sleep infinity
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EXTERNALPID = " $( systemctl show -P MainPID test20-sleep.service) "
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# Update our own main PID to the external test PID, this should work
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systemd-notify MAINPID = " $EXTERNALPID "
test " $( systemctl show -P MainPID testsuite-20.service) " -eq " $EXTERNALPID "
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# Update our own main PID to the internal test PID, this should work, too
systemd-notify MAINPID = $INTERNALPID
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq " $INTERNALPID "
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# Update it back to our own PID, this should also work
systemd-notify MAINPID = $$
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Try to set it to PID 1, which it should ignore, because that's the manager
systemd-notify MAINPID = 1
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Try to set it to PID 0, which is invalid and should be ignored
systemd-notify MAINPID = 0
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Try to set it to a valid but non-existing PID, which should be ignored. (Note
# that we set the PID to a value well above any known /proc/sys/kernel/pid_max,
# which means we can be pretty sure it doesn't exist by coincidence)
systemd-notify MAINPID = 1073741824
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Change it again to the external PID, without privileges this time. This should be ignored, because the PID is from outside of our cgroup and we lack privileges.
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systemd-notify --uid= 1000 MAINPID = " $EXTERNALPID "
test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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# Change it again to the internal PID, without privileges this time. This should work, as the process is on our cgroup, and that's enough even if we lack privileges.
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systemd-notify --uid= 1000 MAINPID = " $INTERNALPID "
test " $( systemctl show -P MainPID testsuite-20.service) " -eq " $INTERNALPID "
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# Update it back to our own PID, this should also work
systemd-notify --uid= 1000 MAINPID = $$
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test " $( systemctl show -P MainPID testsuite-20.service) " -eq $$
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cat >/tmp/test20-mainpid.sh <<EOF
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#!/usr/bin/env bash
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set -eux
set -o pipefail
# Create a number of children, and make one the main one
sleep infinity &
disown
sleep infinity &
MAINPID = \$ !
disown
sleep infinity &
disown
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echo \$ MAINPID >/run/mainpidsh/pid
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EOF
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chmod +x /tmp/test20-mainpid.sh
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systemd-run --unit= test20-mainpidsh.service -p StandardOutput = tty -p StandardError = tty -p Type = forking -p RuntimeDirectory = mainpidsh -p PIDFile = /run/mainpidsh/pid /tmp/test20-mainpid.sh
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test " $( systemctl show -P MainPID test20-mainpidsh.service) " -eq " $( cat /run/mainpidsh/pid) "
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cat >/tmp/test20-mainpid2.sh <<EOF
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#!/usr/bin/env bash
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set -eux
set -o pipefail
# Create a number of children, and make one the main one
sleep infinity &
disown
sleep infinity &
MAINPID = \$ !
disown
sleep infinity &
disown
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echo \$ MAINPID >/run/mainpidsh2/pid
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chown 1001:1001 /run/mainpidsh2/pid
EOF
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chmod +x /tmp/test20-mainpid2.sh
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systemd-run --unit= test20-mainpidsh2.service -p StandardOutput = tty -p StandardError = tty -p Type = forking -p RuntimeDirectory = mainpidsh2 -p PIDFile = /run/mainpidsh2/pid /tmp/test20-mainpid2.sh
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test " $( systemctl show -P MainPID test20-mainpidsh2.service) " -eq " $( cat /run/mainpidsh2/pid) "
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cat >/dev/shm/test20-mainpid3.sh <<EOF
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#!/usr/bin/env bash
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set -eux
set -o pipefail
sleep infinity &
disown
sleep infinity &
disown
sleep infinity &
disown
# Let's try to play games, and link up a privileged PID file
ln -s ../mainpidsh/pid /run/mainpidsh3/pid
# Quick assertion that the link isn't dead
test -f /run/mainpidsh3/pid
EOF
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chmod 755 /dev/shm/test20-mainpid3.sh
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# This has to fail, as we shouldn't accept the dangerous PID file, and then
# inotify-wait on it to be corrected which we never do.
systemd-run --unit= test20-mainpidsh3.service \
-p StandardOutput = tty \
-p StandardError = tty \
-p Type = forking \
-p RuntimeDirectory = mainpidsh3 \
-p PIDFile = /run/mainpidsh3/pid \
-p DynamicUser = 1 \
-p TimeoutStartSec = 2s \
/dev/shm/test20-mainpid3.sh \
&& { echo 'unexpected success' ; exit 1; }
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# Test that this failed due to timeout, and not some other error
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test " $( systemctl show -P Result test20-mainpidsh3.service) " = timeout
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# Test that scope units work
systemd-run --scope --unit test20-true.scope /bin/true
test " $( systemctl show -P Result test20-true.scope) " = success
# Test that user scope units work as well
runas( ) {
declare userid = $1
shift
# shellcheck disable=SC2016
su " $userid " -s /bin/sh -c 'XDG_RUNTIME_DIR=/run/user/$UID exec "$@"' -- sh " $@ "
}
systemctl start user@4711.service
runas testuser systemd-run --scope --user --unit test20-true.scope /bin/true
test " $( systemctl show -P Result test20-true.scope) " = success
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systemd-analyze log-level info
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echo OK >/testok
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exit 0