1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "os.h"
18
19#include <sys/types.h>
20#include <sys/stat.h>
21#include <fcntl.h>
22#include <cstddef>
23#include <memory>
24
25#include "base/logging.h"
26#include "base/unix_file/fd_file.h"
27
28namespace art {
29
30File* OS::OpenFileForReading(const char* name) {
31  return OpenFileWithFlags(name, O_RDONLY);
32}
33
34File* OS::OpenFileReadWrite(const char* name) {
35  return OpenFileWithFlags(name, O_RDWR);
36}
37
38File* OS::CreateEmptyFile(const char* name) {
39  return OpenFileWithFlags(name, O_RDWR | O_CREAT | O_TRUNC);
40}
41
42File* OS::OpenFileWithFlags(const char* name, int flags) {
43  CHECK(name != NULL);
44  std::unique_ptr<File> file(new File);
45  if (!file->Open(name, flags, 0666)) {
46    return NULL;
47  }
48  return file.release();
49}
50
51bool OS::FileExists(const char* name) {
52  struct stat st;
53  if (stat(name, &st) == 0) {
54    return S_ISREG(st.st_mode);  // TODO: Deal with symlinks?
55  } else {
56    return false;
57  }
58}
59
60bool OS::DirectoryExists(const char* name) {
61  struct stat st;
62  if (stat(name, &st) == 0) {
63    return S_ISDIR(st.st_mode);  // TODO: Deal with symlinks?
64  } else {
65    return false;
66  }
67}
68
69}  // namespace art
70