+const char *dss_version(void);
+static void handle_version_and_help(void)
+{
+ char *txt;
+
+ if (OPT_GIVEN(DSS, VERSION)) {
+ printf("%s\n", dss_version());
+ exit(EXIT_SUCCESS);
+ }
+ if (OPT_GIVEN(DSS, DETAILED_HELP))
+ txt = lls_long_help(CMD_PTR(DSS));
+ else if (OPT_GIVEN(DSS, HELP))
+ txt = lls_short_help(CMD_PTR(DSS));
+ else
+ return;
+ printf("%s", txt);
+ printf("\nRun dss help for help on subcommands.\n");
+ free(txt);
+ exit(EXIT_SUCCESS);
+}
+
+static void show_subcommand_summary(void)
+{
+ const struct lls_command *cmd;
+ int i;
+
+ printf("Available subcommands:\n");
+ for (i = 1; (cmd = lls_cmd(i, dss_suite)); i++) {
+ const char *name = lls_command_name(cmd);
+ const char *purpose = lls_purpose(cmd);
+ printf("%-11s%s\n", name, purpose);
+ }
+ printf("\nRun dss help <subcmd> for help on <subcmd>.\n");
+}
+
+static int com_help(void)
+{
+ int ret;
+ char *errctx, *help;
+ const char *arg;
+ const struct lls_command *cmd;
+
+ ret = lls_check_arg_count(sublpr, 0, 1, &errctx);
+ if (ret < 0)
+ return lopsub_error(ret, &errctx);
+ if (lls_num_inputs(sublpr) == 0) {
+ show_subcommand_summary();
+ return 0;
+ }
+ arg = lls_input(0, sublpr);
+ ret = lls_lookup_subcmd(arg, dss_suite, &errctx);
+ if (ret < 0)
+ return lopsub_error(ret, &errctx);
+ cmd = lls_cmd(ret, dss_suite);
+ if (OPT_GIVEN(HELP, LONG))
+ help = lls_long_help(cmd);
+ else
+ help = lls_short_help(cmd);
+ printf("%s", help);
+ free(help);
+ if (!OPT_GIVEN(HELP, LONG))
+ printf("\nRun dss -- help -l %s for long help.\n", arg);
+ return 0;
+}
+EXPORT_CMD_HANDLER(help);
+