1 //===-- Unittests for lseek -----------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "src/errno/libc_errno.h"
10 #include "src/fcntl/open.h"
11 #include "src/unistd/close.h"
12 #include "src/unistd/lseek.h"
13 #include "src/unistd/read.h"
14 #include "test/UnitTest/ErrnoSetterMatcher.h"
15 #include "test/UnitTest/Test.h"
16
17 #include <unistd.h>
18
TEST(LlvmLibcUniStd,LseekTest)19 TEST(LlvmLibcUniStd, LseekTest) {
20 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
21 constexpr const char *FILENAME = "testdata/lseek.test";
22 auto TEST_FILE = libc_make_test_file_path(FILENAME);
23 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);
24 ASSERT_ERRNO_SUCCESS();
25 ASSERT_GT(fd, 0);
26 constexpr const char LSEEK_TEST[] = "lseek test";
27 constexpr int LSEEK_TEST_SIZE = sizeof(LSEEK_TEST) - 1;
28
29 char read_buf[20];
30 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),
31 Succeeds(LSEEK_TEST_SIZE));
32 read_buf[LSEEK_TEST_SIZE] = '\0';
33 EXPECT_STREQ(read_buf, LSEEK_TEST);
34
35 // Seek to the beginning of the file and re-read.
36 ASSERT_THAT(LIBC_NAMESPACE::lseek(fd, 0, SEEK_SET), Succeeds(0));
37 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),
38 Succeeds(LSEEK_TEST_SIZE));
39 read_buf[LSEEK_TEST_SIZE] = '\0';
40 EXPECT_STREQ(read_buf, LSEEK_TEST);
41
42 // Seek to the beginning of the file from the end and re-read.
43 ASSERT_THAT(LIBC_NAMESPACE::lseek(fd, -LSEEK_TEST_SIZE, SEEK_END),
44 Succeeds(0));
45 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),
46 Succeeds(LSEEK_TEST_SIZE));
47 read_buf[LSEEK_TEST_SIZE] = '\0';
48 EXPECT_STREQ(read_buf, LSEEK_TEST);
49
50 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
51 }
52
TEST(LlvmLibcUniStd,LseekFailsTest)53 TEST(LlvmLibcUniStd, LseekFailsTest) {
54 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
55 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
56 constexpr const char *FILENAME = "testdata/lseek.test";
57 auto TEST_FILE = libc_make_test_file_path(FILENAME);
58 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);
59 ASSERT_ERRNO_SUCCESS();
60 ASSERT_GT(fd, 0);
61 EXPECT_THAT(LIBC_NAMESPACE::lseek(fd, -1, SEEK_CUR), Fails(EINVAL));
62 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
63 }
64