1 files changed, 47 insertions, 0 deletions
diff --git a/benchmarks/tcp/nsjoin.c b/benchmarks/tcp/nsjoin.c
new file mode 100644
index 000000000..524b4d549
--- /dev/null
+++ b/benchmarks/tcp/nsjoin.c
@@ -0,0 +1,47 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main(int argc, char** argv) {
+  if (argc <= 2) {
+    fprintf(stderr, "error: must provide a namespace file.\n");
+    fprintf(stderr, "usage: %s <file> [arguments...]\n", argv[0]);
+    return 1;
+  }
+
+  int fd = open(argv[1], O_RDONLY);
+  if (fd < 0) {
+    fprintf(stderr, "error opening %s: %s\n", argv[1], strerror(errno));
+    return 1;
+  }
+  if (setns(fd, 0) < 0) {
+    fprintf(stderr, "error joining %s: %s\n", argv[1], strerror(errno));
+    return 1;
+  }
+
+  execvp(argv[2], &argv[2]);
+  return 1;
+}