mdadm: Add option validation for --update-subarray

[thirdparty/mdadm.git] / ReadMe.c

diff --git a/ReadMe.c b/ReadMe.c
index 50a5e36d05fc0f19955362dc93f2477ea186cd74..bd8d50d286618de0001700c88e5fc24cdcbf580e 100644 (file)
--- a/ReadMe.c
+++ b/ReadMe.c
@@ -655,3 +655,34 @@ char *mode_help[mode_count] = {
        [GROW]          = Help_grow,
        [INCREMENTAL]   = Help_incr,
 };
+
+/**
+ * fprint_update_options() - Print valid update options depending on the mode.
+ * @outf: File (output stream)
+ * @update_mode: Used to distinguish update and update_subarray
+ */
+void fprint_update_options(FILE *outf, enum update_opt update_mode)
+{
+       int counter = UOPT_NAME, breakpoint = UOPT_HELP;
+       mapping_t *map = update_options;
+
+       if (!outf)
+               return;
+       if (update_mode == UOPT_SUBARRAY_ONLY) {
+               breakpoint = UOPT_SUBARRAY_ONLY;
+               fprintf(outf, "Valid --update options for update-subarray are:\n\t");
+       } else
+               fprintf(outf, "Valid --update options are:\n\t");
+       while (map->num) {
+               if (map->num >= breakpoint)
+                       break;
+               fprintf(outf, "'%s', ", map->name);
+               if (counter % 5 == 0)
+                       fprintf(outf, "\n\t");
+               counter++;
+               map++;
+       }
+       if ((counter - 1) % 5)
+               fprintf(outf, "\n");
+       fprintf(outf, "\r");
+}