unistd_test.cpp revision 764a99361130dceda62bbc4f8780bbf395dbc424 
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 <errno.h>
22#include <fcntl.h>
23#include <stdint.h>
24#include <unistd.h>
25#include <sys/types.h>
26#include <sys/wait.h>
27
28TEST(unistd, sysconf_SC_MONOTONIC_CLOCK) {
29  ASSERT_GT(sysconf(_SC_MONOTONIC_CLOCK), 0);
30}
31
32TEST(unistd, sbrk) {
33  void* initial_break = sbrk(0);
34
35  void* new_break = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(initial_break) + 2000);
36  ASSERT_EQ(0, brk(new_break));
37
38  void* final_break = sbrk(0);
39  ASSERT_EQ(final_break, new_break);
40}
41
42TEST(unistd, truncate) {
43  TemporaryFile tf;
44  ASSERT_EQ(0, close(tf.fd));
45  ASSERT_EQ(0, truncate(tf.filename, 123));
46
47  struct stat sb;
48  ASSERT_EQ(0, stat(tf.filename, &sb));
49  ASSERT_EQ(123, sb.st_size);
50}
51
52TEST(unistd, truncate64) {
53  TemporaryFile tf;
54  ASSERT_EQ(0, close(tf.fd));
55  ASSERT_EQ(0, truncate64(tf.filename, 123));
56
57  struct stat sb;
58  ASSERT_EQ(0, stat(tf.filename, &sb));
59  ASSERT_EQ(123, sb.st_size);
60}
61
62TEST(unistd, ftruncate) {
63  TemporaryFile tf;
64  ASSERT_EQ(0, ftruncate(tf.fd, 123));
65  ASSERT_EQ(0, close(tf.fd));
66
67  struct stat sb;
68  ASSERT_EQ(0, stat(tf.filename, &sb));
69  ASSERT_EQ(123, sb.st_size);
70}
71
72TEST(unistd, ftruncate64) {
73  TemporaryFile tf;
74  ASSERT_EQ(0, ftruncate64(tf.fd, 123));
75  ASSERT_EQ(0, close(tf.fd));
76
77  struct stat sb;
78  ASSERT_EQ(0, stat(tf.filename, &sb));
79  ASSERT_EQ(123, sb.st_size);
80}
81
82static bool gPauseTestFlag = false;
83static void PauseTestSignalHandler(int) {
84  gPauseTestFlag = true;
85}
86
87TEST(unistd, pause) {
88  ScopedSignalHandler handler(SIGALRM, PauseTestSignalHandler);
89
90  alarm(1);
91  ASSERT_FALSE(gPauseTestFlag);
92  ASSERT_EQ(-1, pause());
93  ASSERT_TRUE(gPauseTestFlag);
94}
95
96TEST(unistd, read) {
97  int fd = open("/proc/version", O_RDONLY);
98  ASSERT_TRUE(fd != -1);
99
100  char buf[5];
101  ASSERT_EQ(5, read(fd, buf, 5));
102  ASSERT_EQ(buf[0], 'L');
103  ASSERT_EQ(buf[1], 'i');
104  ASSERT_EQ(buf[2], 'n');
105  ASSERT_EQ(buf[3], 'u');
106  ASSERT_EQ(buf[4], 'x');
107  close(fd);
108}
109
110TEST(unistd, read_EBADF) {
111  // read returns ssize_t which is 64-bits on LP64, so it's worth explicitly checking that
112  // our syscall stubs correctly return a 64-bit -1.
113  char buf[1];
114  ASSERT_EQ(-1, read(-1, buf, sizeof(buf)));
115  ASSERT_EQ(EBADF, errno);
116}
117
118TEST(unistd, alarm) {
119  ASSERT_EQ(0U, alarm(0));
120}
121
122TEST(unistd, _exit) {
123  int pid = fork();
124  ASSERT_NE(-1, pid) << strerror(errno);
125
126  if (pid == 0) {
127    _exit(99);
128  }
129
130  int status;
131  ASSERT_EQ(pid, waitpid(pid, &status, 0));
132  ASSERT_TRUE(WIFEXITED(status));
133  ASSERT_EQ(99, WEXITSTATUS(status));
134}
135