zircon/system/utest/posixio/main.cc

// Copyright 2017 The Fuchsia 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 <sys/stat.h>

#include <zxtest/zxtest.h>

TEST(PosixioTest, stat_empty_test) {
  struct stat s;
  int rc = stat("", &s);
  int err = errno;
  ASSERT_EQ(rc, -1);
  ASSERT_EQ(err, ENOENT);
}

TEST(PosixioTest, lstat_empty_test) {
  struct stat s;
  int rc = lstat("", &s);
  int err = errno;
  ASSERT_EQ(rc, -1);
  ASSERT_EQ(err, ENOENT);
}

TEST(PosixioTest, open_empty_test) {
  const int oflags[] = {
      O_EXEC, O_RDONLY, O_RDWR, O_SEARCH, O_WRONLY,
  };

  const int additional_oflags[] = {
      0,       O_APPEND,           O_CLOEXEC,           O_APPEND | O_CLOEXEC,
      O_TRUNC, O_APPEND | O_TRUNC, O_CLOEXEC | O_TRUNC, O_APPEND | O_CLOEXEC | O_TRUNC,
  };

  const mode_t modes[] = {
      0777,
      0644,
      0600,
      0000,
  };

  const int fds[] = {
      0,
      1,
      2,
      AT_FDCWD,
  };

  for (int oflag : oflags) {
    for (int additional_oflag : additional_oflags) {
      int flags = oflag | additional_oflag;
      int rc = open("", flags);
      int err = errno;
      ASSERT_EQ(rc, -1);
      ASSERT_EQ(err, ENOENT);

      for (int fd : fds) {
        int rc = openat(fd, "", flags);
        int err = errno;
        ASSERT_EQ(rc, -1);
        ASSERT_EQ(err, ENOENT);
      }

      for (mode_t mode : modes) {
        rc = open("", flags | O_CREAT, mode);
        err = errno;
        ASSERT_EQ(rc, -1);
        ASSERT_EQ(err, ENOENT);

        for (int fd : fds) {
          int rc = openat(fd, "", flags | O_CREAT, mode);
          int err = errno;
          ASSERT_EQ(rc, -1);
          ASSERT_EQ(err, ENOENT);
        }
      }
    }
  }
}