testdisplay: Allow getopt to print error messages

By not assigning opterr, getopt will print its own error message that
includes information about whether an option is unknown or just requires
an additional argument.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>

diff --git a/tests/testdisplay.c b/tests/testdisplay.c
index 0fcce19..a0f43e9 100644 (file)
--- a/tests/testdisplay.c
+++ b/tests/testdisplay.c
@@ -723,7 +723,6 @@ int main(int argc, char **argv)
 
        enter_exec_path( argv );
 
-       opterr = 0;
        while ((c = getopt(argc, argv, optstr)) != -1) {
                switch (c) {
                case '3':
@@ -771,7 +770,6 @@ int main(int argc, char **argv)
                        sscanf(optarg, "%d,%d", &specified_disp_id, &specified_mode_num);
                        break;
                default:
-                       fprintf(stderr, "unknown option %c\n", c);
                        /* fall through */
                case 'h':
                        usage(argv[0]);