testsuite: cover sdexec perilog configuration

Problem: there is no test coverage for configuring the system
prolog and epilog to run under sdexec.

Add a test script.

t/Makefile.am

@@ -181,6 +181,7 @@ TESTSCRIPTS = \
 	t2409-sdexec.t \
 	t2410-exec-systemd.t \
 	t2411-sdexec-job.t \
+	t2412-sdexec-perilog.t \
 	t2500-job-attach.t \
 	t2501-job-status.t \
 	t2600-job-shell-rcalc.t \

t/t2412-sdexec-perilog.t

@@ -0,0 +1,68 @@
+#!/bin/sh
+# ci=system
+
+test_description='Test that prolog and epilog can be run under systemd'
+
+. $(dirname $0)/sharness.sh
+
+if ! flux version | grep systemd; then
+	skip_all="flux was not built with systemd"
+	test_done
+fi
+if ! systemctl --user show --property Version; then
+	skip_all="user systemd is not running"
+	test_done
+fi
+if ! busctl --user status >/dev/null; then
+	skip_all="user dbus is not running"
+	test_done
+fi
+
+mkdir -p config
+cat >config/config.toml <<EOT
+[systemd]
+enable = true
+sdbus-debug = true
+sdexec-debug = true
+
+[exec]
+service = "sdexec"
+
+[job-manager]
+plugins = [
+    { load = "perilog.so" }
+]
+prolog.command = [
+   "flux", "perilog-run", "prolog", "--sdexec", "-e", "$(pwd)/flist.sh"
+]
+epilog.command = [
+   "flux", "perilog-run", "epilog", "--sdexec", "-e", "$(pwd)/flist.sh"
+]
+EOT
+
+test_under_flux 1 full -o,--config-path=$(pwd)/config
+
+flux setattr log-stderr-level 1
+
+test_expect_success 'create flist.sh script' '
+	cat >flist.sh<<-EOT &&
+	#!/bin/sh
+	systemctl --user list-units --type=service | grep "active running"
+	EOT
+	chmod +x flist.sh
+'
+test_expect_success 'run a single node job and capture broker logs' '
+	flux dmesg -C &&
+	flux run --wait-event=clean -vvv -N1 ./flist.sh >run.out &&
+	flux dmesg >dmesg.out
+'
+test_expect_success 'shell was run under systemd' '
+	grep "User workload" run.out
+'
+test_expect_success 'prolog was run under systemd' '
+	grep "System prolog script" dmesg.out
+'
+test_expect_success 'epilog was run under systemd' '
+	grep "System epilog script" dmesg.out
+'
+test_done