set -eux
set -o pipefail
+# Test changing the main PID
+
systemd-analyze log-level debug
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+# The main service PID should be the parent bash process
+MAINPID="${PPID:?}"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# Start a test process inside of our own cgroup
sleep infinity &
# Update our own main PID to the external test PID, this should work
systemd-notify MAINPID="$EXTERNALPID"
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq "$EXTERNALPID"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$EXTERNALPID"
# Update our own main PID to the internal test PID, this should work, too
systemd-notify MAINPID=$INTERNALPID
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq "$INTERNALPID"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$INTERNALPID"
# Update it back to our own PID, this should also work
-systemd-notify MAINPID=$$
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+systemd-notify MAINPID="$MAINPID"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# Try to set it to PID 1, which it should ignore, because that's the manager
systemd-notify MAINPID=1
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# Try to set it to PID 0, which is invalid and should be ignored
systemd-notify MAINPID=0
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# Try to set it to a valid but non-existing PID, which should be ignored. (Note
# that we set the PID to a value well above any known /proc/sys/kernel/pid_max,
# which means we can be pretty sure it doesn't exist by coincidence)
systemd-notify MAINPID=1073741824
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# 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.
systemd-notify --uid=1000 MAINPID="$EXTERNALPID"
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
# Change it again to the internal PID, without privileges this time. This should work, as the process is on our cgroup, and that's enough even if we lack privileges.
systemd-notify --uid=1000 MAINPID="$INTERNALPID"
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq "$INTERNALPID"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$INTERNALPID"
# Update it back to our own PID, this should also work
-systemd-notify --uid=1000 MAINPID=$$
-test "$(systemctl show -P MainPID testsuite-20.service)" -eq $$
+systemd-notify --uid=1000 MAINPID="$MAINPID"
+test "$(systemctl show -P MainPID testsuite-07.service)" -eq "$MAINPID"
-cat >/tmp/test-mainpid.sh <<EOF
+cat >/tmp/test-mainpid.sh <<\EOF
#!/usr/bin/env bash
set -eux
disown
sleep infinity &
-MAINPID=\$!
+MAINPID=$!
disown
sleep infinity &
disown
-echo \$MAINPID >/run/mainpidsh/pid
+echo $MAINPID >/run/mainpidsh/pid
EOF
chmod +x /tmp/test-mainpid.sh
-systemd-run --unit=test-mainpidsh.service -p StandardOutput=tty -p StandardError=tty -p Type=forking -p RuntimeDirectory=mainpidsh -p PIDFile=/run/mainpidsh/pid /tmp/test-mainpid.sh
+systemd-run --unit=test-mainpidsh.service \
+ -p StandardOutput=tty \
+ -p StandardError=tty \
+ -p Type=forking \
+ -p RuntimeDirectory=mainpidsh \
+ -p PIDFile=/run/mainpidsh/pid \
+ /tmp/test-mainpid.sh
test "$(systemctl show -P MainPID test-mainpidsh.service)" -eq "$(cat /run/mainpidsh/pid)"
-cat >/tmp/test-mainpid2.sh <<EOF
+cat >/tmp/test-mainpid2.sh <<\EOF
#!/usr/bin/env bash
set -eux
disown
sleep infinity &
-MAINPID=\$!
+MAINPID=$!
disown
sleep infinity &
disown
-echo \$MAINPID >/run/mainpidsh2/pid
+echo $MAINPID >/run/mainpidsh2/pid
chown 1001:1001 /run/mainpidsh2/pid
EOF
chmod +x /tmp/test-mainpid2.sh
-systemd-run --unit=test-mainpidsh2.service -p StandardOutput=tty -p StandardError=tty -p Type=forking -p RuntimeDirectory=mainpidsh2 -p PIDFile=/run/mainpidsh2/pid /tmp/test-mainpid2.sh
+systemd-run --unit=test-mainpidsh2.service \
+ -p StandardOutput=tty \
+ -p StandardError=tty \
+ -p Type=forking \
+ -p RuntimeDirectory=mainpidsh2 \
+ -p PIDFile=/run/mainpidsh2/pid \
+ /tmp/test-mainpid2.sh
test "$(systemctl show -P MainPID test-mainpidsh2.service)" -eq "$(cat /run/mainpidsh2/pid)"
cat >/dev/shm/test-mainpid3.sh <<EOF
-p RuntimeDirectory=mainpidsh3 \
-p PIDFile=/run/mainpidsh3/pid \
-p DynamicUser=1 \
+ `# Make sanitizers happy when DynamicUser=1 pulls in instrumented systemd NSS modules` \
+ -p EnvironmentFile=-/usr/lib/systemd/systemd-asan-env \
-p TimeoutStartSec=2s \
/dev/shm/test-mainpid3.sh)
test "$(systemctl show -P Result test-true.scope)" = success
systemd-analyze log-level info
-
-echo OK >/testok
-
-exit 0