+ enum {
+ ARG_PREFIX
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "prefix", required_argument, NULL, ARG_PREFIX },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_PREFIX: {
+ char *p;
+
+ for (p = optarg; *p; p++)
+ if (*p == '.')
+ *p = '/';
+
+ arg_prefix = optarg;
+
+ break;
+ }
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}