summaryrefslogtreecommitdiff
path: root/samples/bpf/tracex7_user.c
diff options
context:
space:
mode:
Diffstat (limited to 'samples/bpf/tracex7_user.c')
-rw-r--r--samples/bpf/tracex7_user.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/samples/bpf/tracex7_user.c b/samples/bpf/tracex7_user.c
index fdcd6580dd73..8be7ce18d3ba 100644
--- a/samples/bpf/tracex7_user.c
+++ b/samples/bpf/tracex7_user.c
@@ -14,6 +14,11 @@ int main(int argc, char **argv)
int ret = 0;
FILE *f;
+ if (!argv[1]) {
+ fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
+ return 0;
+ }
+
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
obj = bpf_object__open_file(filename, NULL);
if (libbpf_get_error(obj)) {