Non-SFI mode: Add syscalls which are needed for nacl_helper_nonsfi's sandbox.

tests/nonsfi/file_descriptor_test.cc

+/*
+ * Copyright 2014 The Native Client 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 <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "native_client/src/include/nacl_assert.h"
+
+static ssize_t read_from_fd(int fd, char* buf, size_t buf_len) {
+  size_t len = 0;
+  while (len < buf_len) {
+    ssize_t rc = read(fd, buf + len, buf_len - len);
+    if (rc < 0)
+      return -1;
+    if (rc == 0)
+      break;  // EOF.
+    len += rc;
+  }
+  return len;
+}
+
+void test_openat(const char *test_directory) {
+  puts("test for openat()");
+  const char test_file_name[] = "test_openat_file.txt";
+  const char test_file_content[] = "Hello, World.\n";
+
+  char test_path[PATH_MAX];
+  snprintf(test_path, PATH_MAX, "%s/%s", test_directory, test_file_name);
+
+  // Create a test file under the |test_directory|.
+  {
+    FILE *fp = fopen(test_path, "w");
+    ASSERT_NE(fp, NULL);
+    fputs(test_file_content, fp);
+    fclose(fp);
+  }
+
+  int dirfd = open(test_directory, O_RDONLY | O_DIRECTORY);
+  ASSERT_GE(dirfd, 0);
+
+  int fd = openat(dirfd, test_file_name, O_RDONLY);
+  ASSERT_GE(fd, 0);
+
+  // Read the file content.
+  const int kBufLen = 80;
+  char buf[kBufLen];
+  ssize_t len = read_from_fd(fd, buf, kBufLen);
+  ASSERT_EQ(len, sizeof(test_file_content) - 1);
+  ASSERT_EQ(memcmp(buf, test_file_content, len), 0);
+
+  // Open for the non-directory fd.
+  int fd2 = openat(fd, test_file_name, O_RDONLY);
+  ASSERT_EQ(fd2, -1);
+  ASSERT_EQ(errno, ENOTDIR);
+  errno = 0;
+
+  int rc = close(fd);
+  ASSERT_EQ(rc, 0);
+
+  // Test for AT_FDCWD.
+  fd = openat(AT_FDCWD, test_path, O_RDONLY);

[hamaji, 2014/12/08 07:38:39]

Doesn't this test pass even if AT_FDCWD == dirfd? I think chdir(test_directory)
+ openat(AT_FDCWD, test_file_name) would be a slightly better test.

[hidehiko, 2014/12/08 12:39:39]

Done.

+  ASSERT_GE(fd, 0);
+  len = read_from_fd(fd, buf, kBufLen);
+  ASSERT_EQ(len, sizeof(test_file_content) - 1);
+  ASSERT_EQ(memcmp(buf, test_file_content, len), 0);
+
+  // Test for non-existing file.
+  fd = openat(dirfd, "non-existing-file", O_RDONLY);
+  ASSERT_EQ(fd, -1);
+  ASSERT_EQ(errno, ENOENT);
+  errno = 0;
+
+  rc = close(dirfd);
+  ASSERT_EQ(rc, 0);
+
+  // Test for invalid directory fd.
+  fd = openat(-1, test_file_name, O_RDONLY);
+  ASSERT_EQ(fd, -1);
+  ASSERT_EQ(errno, EBADF);
+}
+
+void test_fstatat(const char *test_directory) {
+  puts("test for fstatat()");
+  const char test_file_name[] = "test_fstatat_file.txt";
+  char test_path[PATH_MAX];
+  snprintf(test_path, PATH_MAX, "%s/%s", test_directory, test_file_name);
+
+  // Create an empty file.
+  {
+    FILE *fp = fopen(test_path, "w");
+    fclose(fp);
+  }
+
+  struct stat buf;
+  struct stat buf2;
+  int rc = stat(test_path, &buf);
+  ASSERT_EQ(rc, 0);
+  int dirfd = open(test_directory, O_RDONLY | O_DIRECTORY);
+  ASSERT_GE(dirfd, 0);
+  // Currently, no |flag| is defined. So, pass 0.
+  rc = fstatat(dirfd, test_file_name, &buf2, 0);
+  ASSERT_EQ(rc, 0);
+  ASSERT_EQ(buf.st_dev, buf2.st_dev);
+  ASSERT_EQ(buf.st_mode, buf2.st_mode);
+  ASSERT_EQ(buf.st_nlink, buf2.st_nlink);
+  ASSERT_EQ(buf.st_uid, buf2.st_uid);
+  ASSERT_EQ(buf.st_gid, buf2.st_gid);
+  ASSERT_EQ(buf.st_rdev, buf2.st_rdev);
+  ASSERT_EQ(buf.st_size, buf2.st_size);
+  ASSERT_EQ(buf.st_blksize, buf2.st_blksize);
+  ASSERT_EQ(buf.st_blocks, buf2.st_blocks);
+  ASSERT_EQ(buf.st_atime, buf2.st_atime);
+  ASSERT_EQ(buf.st_mtime, buf2.st_mtime);
+  ASSERT_EQ(buf.st_ctime, buf2.st_ctime);
+
+  // Test for AT_FDCWD.
+  rc = fstatat(AT_FDCWD, test_path, &buf2, 0);
+  ASSERT_EQ(rc, 0);
+  ASSERT_EQ(buf.st_dev, buf2.st_dev);
+  ASSERT_EQ(buf.st_mode, buf2.st_mode);
+  ASSERT_EQ(buf.st_nlink, buf2.st_nlink);
+  ASSERT_EQ(buf.st_uid, buf2.st_uid);
+  ASSERT_EQ(buf.st_gid, buf2.st_gid);
+  ASSERT_EQ(buf.st_rdev, buf2.st_rdev);
+  ASSERT_EQ(buf.st_size, buf2.st_size);
+  ASSERT_EQ(buf.st_blksize, buf2.st_blksize);
+  ASSERT_EQ(buf.st_blocks, buf2.st_blocks);
+  ASSERT_EQ(buf.st_atime, buf2.st_atime);
+  ASSERT_EQ(buf.st_mtime, buf2.st_mtime);
+  ASSERT_EQ(buf.st_ctime, buf2.st_ctime);
+
+  // Test for non-existing file.
+  rc = fstatat(dirfd, "not-existing-file", &buf, 0);
+  ASSERT_EQ(rc, -1);
+  ASSERT_EQ(errno, ENOENT);
+  errno = 0;
+
+  rc = close(dirfd);
+  ASSERT_EQ(rc, 0);
+
+  // With invalid file descriptor.
+  rc = fstatat(-1, test_file_name, &buf2, 0);
+  ASSERT_EQ(rc, -1);
+  ASSERT_EQ(errno, EBADF);
+  errno = 0;
+
+  // Test with non-directory file descriptor.
+  int fd = open(test_path, O_RDONLY);
+  ASSERT_GE(fd, 0);
+  rc = fstatat(fd, test_file_name, &buf2, 0);
+  ASSERT_EQ(rc, -1);
+  ASSERT_EQ(errno, ENOTDIR);
+  errno = 0;
+
+  rc = close(fd);
+  ASSERT_EQ(rc, 0);
+}
+
+int main(int argc, char *argv[]) {
+  if (argc != 2) {
+    printf("Please specify the test directory name.\n");
+    exit(-1);
+  }
+
+  const char* test_directory = argv[1];
+  test_openat(test_directory);
+  test_fstatat(test_directory);
+
+  puts("PASSED");
+  return 0;
+}