+static enum {
+ ACTION_ESCAPE,
+ ACTION_UNESCAPE,
+ ACTION_MANGLE
+} arg_action = ACTION_ESCAPE;
+static const char *arg_suffix = NULL;
+static const char *arg_template = NULL;
+static bool arg_path = false;
+
+static void help(void) {
+ printf("%s [OPTIONS...] [NAME...]\n\n"
+ "Show system and user paths.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --suffix=SUFFIX Unit suffix to append to escaped strings\n"
+ " --template=TEMPLATE Insert strings as instance into template\n"
+ " -u --unescape Unescape strings\n"
+ " -m --mangle Mangle strings\n"
+ " -p --path When escaping/unescaping assume the string is a path\n"
+ , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_SUFFIX,
+ ARG_TEMPLATE
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "suffix", required_argument, NULL, ARG_SUFFIX },
+ { "template", required_argument, NULL, ARG_TEMPLATE },
+ { "unescape", no_argument, NULL, 'u' },
+ { "mangle", no_argument, NULL, 'm' },
+ { "path", no_argument, NULL, 'p' },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_SUFFIX:
+
+ if (unit_type_from_string(optarg) < 0) {
+ log_error("Invalid unit suffix type %s.", optarg);
+ return -EINVAL;
+ }
+
+ arg_suffix = optarg;
+ break;
+
+ case ARG_TEMPLATE:
+
+ if (!unit_name_is_valid(optarg, true) || !unit_name_is_template(optarg)) {
+ log_error("Template name %s is not valid.", optarg);
+ return -EINVAL;
+ }
+
+ arg_template = optarg;
+ break;
+
+ case 'u':
+ arg_action = ACTION_UNESCAPE;
+ break;
+
+ case 'm':
+ arg_action = ACTION_MANGLE;
+ break;
+
+ case 'p':
+ arg_path = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (optind >= argc) {
+ log_error("Not enough arguments.");
+ return -EINVAL;
+ }
+
+ if (arg_template && arg_suffix) {
+ log_error("--suffix= and --template= may not be combined.");
+ return -EINVAL;
+ }