+
+static void show_option_range(struct fio_option *o)
+{
+ if (!o->minval && !o->maxval)
+ return;
+
+ printf("%16s: min=%d, max=%d\n", "range", o->minval, o->maxval);
+}
+
+static void show_option_values(struct fio_option *o)
+{
+ const char *msg;
+ int i = 0;
+
+ if (!o->posval)
+ return;
+
+ do {
+ msg = o->posval[i];
+ if (!msg)
+ break;
+
+ if (!i)
+ printf("%16s: ", "valid values");
+
+ printf("%s,", msg);
+ i++;
+ } while (1);
+
+ if (i)
+ printf("\n");
+}
+
+int show_cmd_help(struct fio_option *options, const char *name)
+{
+ int show_all = !strcmp(name, "all");
+ const char *typehelp[] = {
+ "string (opt=bla)",
+ "string with possible k/m/g postfix (opt=4k)",
+ "string with range and postfix (opt=1k-4k)",
+ "string with time postfix (opt=10s)",
+ "string (opt=bla)",
+ "string with dual range (opt=1k-4k,4k-8k)",
+ "integer value (opt=100)",
+ "boolean value (opt=1)",
+ "no argument (opt)",
+ };
+ struct fio_option *o;
+ int found = 0;
+
+ for (o = &options[0]; o->name; o++) {
+ int match = !strcmp(name, o->name);
+
+ if (show_all || match) {
+ found = 1;
+ printf("%16s: %s\n", o->name, o->help);
+ if (show_all)
+ continue;
+ }
+
+ if (!match)
+ continue;
+
+ printf("%16s: %s\n", "type", typehelp[o->type]);
+ printf("%16s: %s\n", "default", o->def ? o->def : "no default");
+ show_option_range(o);
+ show_option_values(o);
+ }
+
+ if (found)
+ return 0;
+
+ printf("No such command: %s\n", name);
+ return 1;
+}
+
+/*
+ * Handle parsing of default parameters.
+ */
+void fill_default_options(void *data, struct fio_option *options)
+{
+ struct fio_option *o;
+
+ for (o = &options[0]; o->name; o++)
+ if (o->def)
+ handle_option(o, o->def, data);
+}
+
+/*
+ * Sanitize the options structure. For now it just sets min/max for bool
+ * values and whether both callback and offsets are given.
+ */
+void options_init(struct fio_option *options)
+{
+ struct fio_option *o;
+
+ for (o = &options[0]; o->name; o++) {
+ if (o->type == FIO_OPT_BOOL) {
+ o->minval = 0;
+ o->maxval = 1;
+ }
+ if (o->cb && (o->off1 || o->off2 || o->off3 || o->off4))
+ fprintf(stderr, "Option %s: both cb and offset given\n", o->name);
+ }
+}