Implement lstat by stat in nacl_io

native_client_sdk/src/tests/nacl_io_test/kernel_proxy_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <sys/stat.h>
 
@@ skipping 398 matching lines @@
   ASSERT_EQ(4, ki_write(dup_fd, "more", 4));
 
   ASSERT_EQ(0, ki_close(dup2_fd));
   // fd, new_fd -> "/bar"
   // dup_fd -> "/foo"
 
   ASSERT_EQ(dup_fd, ki_dup2(fd, dup_fd));
   // fd, new_fd, dup_fd -> "/bar"
 }
 
+TEST_F(KernelProxyTest, Lstat) {
+  int fd = ki_open("/foo", O_CREAT | O_RDWR);
+  ASSERT_GT(fd, -1);
+  ASSERT_EQ(0, ki_mkdir("/bar", S_IREAD | S_IWRITE));
+
+  struct stat buf;
+  EXPECT_EQ(0, ki_lstat("/foo", &buf));
+  EXPECT_EQ(0, buf.st_size);
+  EXPECT_TRUE(S_ISREG(buf.st_mode));
+
+  EXPECT_EQ(0, ki_lstat("/bar", &buf));
+  EXPECT_EQ(0, buf.st_size);
+  EXPECT_TRUE(S_ISDIR(buf.st_mode));
+
+  EXPECT_EQ(-1, ki_lstat("/no-such-file", &buf));
+  EXPECT_EQ(ENOENT, errno);
+}
+
 namespace {
 
 StringMap_t g_string_map;
 
 class KernelProxyMountTest_Filesystem : public MemFs {
  public:
   using MemFs::Init;
 
   virtual Error Init(const FsInitArgs& args) {
     g_string_map = args.string_map;
@@ skipping 238 matching lines @@
 
   int fd = ki_open("/dummy", O_RDONLY);
   EXPECT_NE(0, fd);
 
   char buf[20];
   EXPECT_EQ(-1, ki_read(fd, &buf[0], 20));
   // The Filesystem should be able to return whatever error it wants and have it
   // propagate through.
   EXPECT_EQ(1234, errno);
 }