+static int access_check(void) {
+
+#ifdef HAVE_ACL
+ if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
+ log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
+ return -EACCES;
+ }
+
+ if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
+ log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
+#else
+ if (geteuid() != 0 && in_group("adm") <= 0) {
+ log_error("No access to messages. Only users in the group 'adm' can see messages.");
+ return -EACCES;
+ }
+#endif
+
+ return 0;
+}
+