test: new test to verify support for forking services

Issue #223

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/Makefile.am

@@ -29,6 +29,7 @@ TESTS			+= start-stop-service.sh
 TESTS			+= start-stop-service-sub-config.sh
 TESTS			+= start-kill-service.sh
 TESTS			+= start-stop-sysv.sh
+TESTS			+= start-stop-fserv.sh
 TESTS			+= signal-service.sh
 
 clean-local:

test/common/.gitignore

@@ -1,2 +1,5 @@
 /Makefile
 /Makefile.in
+
+/.deps/
+/fserv

test/common/Makefile.am

@@ -1,2 +1,4 @@
 EXTRA_DIST	= service.conf service.sh S01-service.sh slay.sh
 
+noinst_PROGRAMS = fserv
+fserv_SOURCES   = fserv.c

test/common/fserv.c

@@ -0,0 +1,55 @@
+/* Basic forking UNIX daemon with no options to run in foreground */
+
+#include <err.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static void sig(int signo)
+{
+	warnx("We got signal %d ...", signo);
+	exit(0);
+}
+
+static void pidfile(char *nm)
+{
+	char fn[80];
+	pid_t pid;
+	FILE *fp;
+
+	if (!nm)
+		nm = "fserv";
+
+	snprintf(fn, sizeof(fn), "%s%s.pid", _PATH_VARRUN, nm);
+	pid = getpid();
+	warnx("Creating PID file %s with %d", fn, pid);
+
+	fp = fopen(fn, "w");
+	if (!fp)
+		exit(1);
+	fprintf(fp, "%d\n", pid);
+	fclose(fp);
+}
+
+int main(void)
+{
+	/* Daemonize, fork to background etc. */
+	if (daemon(0, 1))
+		return 1;
+
+	/* Signal handlers first *then* PID file */
+	signal(SIGTERM, sig);
+
+	/* Tell finit where we really are */
+	pidfile(NULL);
+
+	warnx("Entering while(1) loop");
+	while (1)
+		sleep(1);
+
+	warnx("Leaving ...");
+	return 0;
+}

test/start-stop-fserv.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+set -eu
+
+TEST_DIR=$(dirname "$0")
+
+# shellcheck source=/dev/null
+. "$TEST_DIR/tenv/lib.sh"
+
+test_teardown()
+{
+	say "Test done $(date)"
+	say "Running test teardown."
+
+	texec rm -f "$FINIT_CONF"
+	texec rm -f /test_assets/fserv
+}
+
+say "Test start $(date)"
+
+cp "$TEST_DIR"/common/fserv "$TENV_ROOT"/test_assets/
+
+say "Add service stanza in $FINIT_CONF"
+texec sh -c "echo 'service [2345] pid:!/run/fserv.pid /test_assets/fserv -- Forking service' > $FINIT_CONF"
+
+say 'Reload Finit'
+#texec sh -c "initctl debug"
+texec sh -c "initctl reload"
+#texec sh -c "initctl status"
+#texec sh -c "ps"
+
+# Wait for process to fork, create its PID file so Finit can register
+# its new PID -- this is the major difference from regular services.
+sleep 2
+
+#texec sh -c "initctl status"
+#texec sh -c "ps"
+#texec sh -c "initctl status fserv"
+
+retry 'assert_num_children 1 fserv'
+
+say 'Stop the service'
+texec sh -c "initctl stop fserv"
+
+retry 'assert_num_children 0 fserv'
+
+say 'Start the service again'
+texec sh -c "initctl start fserv"
+
+retry 'assert_num_children 1 fserv'