Prevent repmgr/repmgrd running as root

repmgrd.c

@@ -142,6 +142,20 @@ main(int argc, char **argv)
 
 	set_progname(argv[0]);
 
+	/* Disallow running as root to prevent directory ownership problems */
+	if (geteuid() == 0)
+	{
+		fprintf(stderr,
+				_("%s: cannot be run as root\n"
+				  "Please log in (using, e.g., \"su\") as the "
+				  "(unprivileged) user that owns "
+				  "the data directory.\n"
+				),
+				progname());
+		exit(1);
+	}
+
+
 	while ((c = getopt_long(argc, argv, "?Vf:vmdp:", long_options, &optindex)) != -1)
 	{
 		switch (c)