test: rename fserv -> serv, more features to be added

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

test/common/serv.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 = "serv";
+
+	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;
+}