samples/bpf: xdp_monitor, accept short options

Updated optstring parameter for getopt_long() to accept short options.
Also updated usage() function.

Signed-off-by: Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/samples/bpf/xdp_monitor_user.c b/samples/bpf/xdp_monitor_user.c
index 894bc64c2cac651851c0603e8f51af45a3692a45..05ad3f590c918647ace13c39f2d8a0ee0d2b7c0c 100644 (file)
--- a/samples/bpf/xdp_monitor_user.c
+++ b/samples/bpf/xdp_monitor_user.c
@@ -58,7 +58,7 @@ static void usage(char *argv[])
                        printf(" flag (internal value:%d)",
                               *long_options[i].flag);
                else
-                       printf("(internal short-option: -%c)",
+                       printf("short-option: -%c",
                               long_options[i].val);
                printf("\n");
        }
@@ -594,7 +594,7 @@ int main(int argc, char **argv)
        snprintf(bpf_obj_file, sizeof(bpf_obj_file), "%s_kern.o", argv[0]);
 
        /* Parse commands line args */
-       while ((opt = getopt_long(argc, argv, "h",
+       while ((opt = getopt_long(argc, argv, "hDSs:",
                                  long_options, &longindex)) != -1) {
                switch (opt) {
                case 'D':