test: ignore ENOENT and EACCES from nvme_scan_topology

Replace nvme_scan with nvme_scan_topology and ignore any ENOENT and
EACCES. Either the nvme module is not loaded/present or the current
user might now have permissions to access the device.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

libnvme/test/cpp.cc

@@ -18,9 +18,16 @@ int main()
 	nvme_ctrl_t c;
 	nvme_path_t p;
 	nvme_ns_t n;
+	int err;
 
-	if (nvme_scan(NULL, &ctx))
-		return -1;
+	ctx = nvme_create_global_ctx(stdout, DEFAULT_LOGLEVEL);
+	if (!ctx)
+		return 1;
+
+	err = nvme_scan_topology(ctx, NULL, NULL);
+	if (err && !(err == -ENOENT || err == -EACCES))
+		goto out;
+	err = 0;
 
 	nvme_for_each_host(ctx, h) {
 		nvme_for_each_subsystem(h, s) {
@@ -60,7 +67,9 @@ int main()
 		}
 	}
 	std::cout << "\n";
+
+out:
 	nvme_free_global_ctx(ctx);
 
-	return 0;
+	return err != 0 ? 1 : 0;
 }