1 /*
2  * Copyright (C) 2024 HiHope Open Source Organization.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #include <cstring>
17 #include <fcntl.h>
18 #include <unistd.h>
19 #include <gtest/gtest.h>
20 #include <sys/stat.h>
21 #include <sys/types.h>
22 
23 using namespace testing::ext;
24 using namespace std;
25 
26 class Pread64Test : public testing::Test {
27 public:
28     static void SetUpTestCase();
29     static void TearDownTestCase();
30     void SetUp();
31     void TearDown();
32 
33 private:
34 };
35 
36 static const char* TEST_DATA = "Hello, world!";
37 static const size_t TEST_LEN = strlen(TEST_DATA);
38 static const char* TEST_FILE = "/data/local/tmp/test_file.txt";
39 
SetUpTestCase()40 void Pread64Test::SetUpTestCase()
41 {
42 }
43 
TearDownTestCase()44 void Pread64Test::TearDownTestCase()
45 {
46 }
47 
SetUp()48 void Pread64Test::SetUp()
49 {
50     int fd = -1;
51     if (access(TEST_FILE, F_OK) == 0) {
52         remove(TEST_FILE);
53     }
54 
55     fd = open(TEST_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
56     write(fd, TEST_DATA, strlen(TEST_DATA));
57     close(fd);
58 }
59 
TearDown()60 void Pread64Test::TearDown()
61 {
62     (void)remove(TEST_FILE);
63 }
64 
65 /*
66  * @tc.number : SUB_KERNEL_SYSCALL_PREAD64_0100
67  * @tc.name   : Pread64ReadSuccess_0001
68  * @tc.desc   : Test basic read functionality of pread64.
69  * @tc.size   : MediumTest
70  * @tc.type   : Function
71  * @tc.level  : Level 1
72  */
HWTEST_F(Pread64Test, Pread64ReadSuccess_0001, Function | MediumTest | Level1)73 HWTEST_F(Pread64Test, Pread64ReadSuccess_0001, Function | MediumTest | Level1)
74 {
75     ssize_t size;
76     int midLen = TEST_LEN / 2;
77     char buf[20] = {0};
78     int fd = open(TEST_FILE, O_RDONLY);
79 
80     // pread64 from file start
81     size = pread64(fd, buf, TEST_LEN, 0);
82     EXPECT_EQ(size, TEST_LEN);
83     EXPECT_STREQ(buf, TEST_DATA);
84 
85     // pread64 from file middle
86     std::fill_n(buf, sizeof(buf), 0);
87     size = pread64(fd, buf, TEST_LEN, midLen);
88     EXPECT_EQ(size, TEST_LEN - midLen);
89     EXPECT_STREQ(buf, &TEST_DATA[midLen]);
90 
91     // pread64 from file end
92     std::fill_n(buf, sizeof(buf), 0);
93     size = pread64(fd, buf, TEST_LEN, TEST_LEN);
94     EXPECT_EQ(size, 0);
95 
96     close(fd);
97 }
98 
99 /*
100  * @tc.number : SUB_KERNEL_SYSCALL_PREAD64_0200
101  * @tc.name   : Pread64InvalidFdFailed_0002
102  * @tc.desc   : Test using an invalid file descriptor, errno EBADF.
103  * @tc.size   : MediumTest
104  * @tc.type   : Function
105  * @tc.level  : Level 2
106  */
HWTEST_F(Pread64Test, Pread64InvalidFdFailed_0002, Function | MediumTest | Level2)107 HWTEST_F(Pread64Test, Pread64InvalidFdFailed_0002, Function | MediumTest | Level2)
108 {
109     char buf[20] = {0};
110     ssize_t size;
111     errno = 0;
112     size = pread64(-1, buf, TEST_LEN, 0);
113     EXPECT_EQ(size, -1);
114     EXPECT_EQ(errno, EBADF);
115 }
116