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>

1 files changed, 2 insertions, 2 deletions

diff --git a/samples/bpf/xdp_monitor_user.c b/samples/bpf/xdp_monitor_user.c
index 894bc64c2cac..05ad3f590c91 100644
--- 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':