unistd_test.cpp revision 13613137bc4266656bffce464e525eb9ae6371f0 
1/*
2 * Copyright (C) 2012 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 <gtest/gtest.h>
18#include "ScopedSignalHandler.h"
19#include "TemporaryFile.h"
20
21#include <stdint.h>
22#include <unistd.h>
23
24TEST(unistd, sysconf_SC_MONOTONIC_CLOCK) {
25  ASSERT_GT(sysconf(_SC_MONOTONIC_CLOCK), 0);
26}
27
28TEST(unistd, sbrk) {
29  void* initial_break = sbrk(0);
30
31  void* new_break = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(initial_break) + 2000);
32  ASSERT_EQ(0, brk(new_break));
33
34  void* final_break = sbrk(0);
35  ASSERT_EQ(final_break, new_break);
36}
37
38TEST(unistd, truncate) {
39  TemporaryFile tf;
40  ASSERT_EQ(0, close(tf.fd));
41  ASSERT_EQ(0, truncate(tf.filename, 123));
42
43  struct stat sb;
44  ASSERT_EQ(0, stat(tf.filename, &sb));
45  ASSERT_EQ(123, sb.st_size);
46}
47
48TEST(unistd, truncate64) {
49  TemporaryFile tf;
50  ASSERT_EQ(0, close(tf.fd));
51  ASSERT_EQ(0, truncate64(tf.filename, 123));
52
53  struct stat sb;
54  ASSERT_EQ(0, stat(tf.filename, &sb));
55  ASSERT_EQ(123, sb.st_size);
56}
57
58TEST(unistd, ftruncate) {
59  TemporaryFile tf;
60  ASSERT_EQ(0, ftruncate(tf.fd, 123));
61  ASSERT_EQ(0, close(tf.fd));
62
63  struct stat sb;
64  ASSERT_EQ(0, stat(tf.filename, &sb));
65  ASSERT_EQ(123, sb.st_size);
66}
67
68TEST(unistd, ftruncate64) {
69  TemporaryFile tf;
70  ASSERT_EQ(0, ftruncate64(tf.fd, 123));
71  ASSERT_EQ(0, close(tf.fd));
72
73  struct stat sb;
74  ASSERT_EQ(0, stat(tf.filename, &sb));
75  ASSERT_EQ(123, sb.st_size);
76}
77
78static bool gPauseTestFlag = false;
79static void PauseTestSignalHandler(int) {
80  gPauseTestFlag = true;
81}
82
83TEST(unistd, pause) {
84  ScopedSignalHandler handler(SIGALRM, PauseTestSignalHandler);
85
86  alarm(1);
87  ASSERT_FALSE(gPauseTestFlag);
88  ASSERT_EQ(-1, pause());
89  ASSERT_TRUE(gPauseTestFlag);
90}
91