1//===-- Unittest for fdopen -----------------------------------------------===//
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/stdio/fdopen.h"
10
11#include "hdr/fcntl_macros.h"
12#include "src/__support/libc_errno.h"
13#include "src/fcntl/open.h"
14#include "src/stdio/fclose.h"
15#include "src/stdio/fgets.h"
16#include "src/stdio/fputs.h"
17#include "src/unistd/close.h"
18#include "test/UnitTest/ErrnoSetterMatcher.h"
19#include "test/UnitTest/Test.h"
20
21#include <sys/stat.h> // For S_IRWXU
22
23TEST(LlvmLibcStdioFdopenTest, WriteAppendRead) {
24 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
25 libc_errno = 0;
26 constexpr const char *TEST_FILE_NAME = "testdata/write_read_append.test";
27 auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
28 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
29 auto *fp = LIBC_NAMESPACE::fdopen(fd, "w");
30 ASSERT_ERRNO_SUCCESS();
31 ASSERT_TRUE(nullptr != fp);
32 constexpr const char HELLO[] = "Hello";
33 LIBC_NAMESPACE::fputs(HELLO, fp);
34 LIBC_NAMESPACE::fclose(fp);
35 ASSERT_ERRNO_SUCCESS();
36
37 constexpr const char LLVM[] = "LLVM";
38 int fd2 = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_RDWR);
39 auto *fp2 = LIBC_NAMESPACE::fdopen(fd2, "a");
40 ASSERT_ERRNO_SUCCESS();
41 ASSERT_TRUE(nullptr != fp2);
42 LIBC_NAMESPACE::fputs(LLVM, fp2);
43 LIBC_NAMESPACE::fclose(fp2);
44 ASSERT_ERRNO_SUCCESS();
45
46 int fd3 = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_RDWR);
47 auto *fp3 = LIBC_NAMESPACE::fdopen(fd3, "r");
48 char buffer[10];
49 LIBC_NAMESPACE::fgets(buffer, sizeof(buffer), fp3);
50 ASSERT_STREQ("HelloLLVM", buffer);
51 LIBC_NAMESPACE::fclose(fp3);
52 ASSERT_ERRNO_SUCCESS();
53}
54
55TEST(LlvmLibcStdioFdopenTest, InvalidFd) {
56 libc_errno = 0;
57 constexpr const char *TEST_FILE_NAME = "testdata/invalid_fd.test";
58 auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
59 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC);
60 LIBC_NAMESPACE::close(fd);
61 // With `fd` already closed, `fdopen` should fail and set the `errno` to EBADF
62 auto *fp = LIBC_NAMESPACE::fdopen(fd, "r");
63 ASSERT_ERRNO_EQ(EBADF);
64 ASSERT_TRUE(nullptr == fp);
65}
66
67TEST(LlvmLibcStdioFdopenTest, InvalidMode) {
68 libc_errno = 0;
69 constexpr const char *TEST_FILE_NAME = "testdata/invalid_mode.test";
70 auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
71 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_RDONLY, S_IRWXU);
72 ASSERT_ERRNO_SUCCESS();
73 ASSERT_GT(fd, 0);
74
75 // `Mode` must be one of "r", "w" or "a"
76 auto *fp = LIBC_NAMESPACE::fdopen(fd, "m+");
77 ASSERT_ERRNO_EQ(EINVAL);
78 ASSERT_TRUE(nullptr == fp);
79
80 // If the mode argument is invalid, then `fdopen` returns a nullptr and sets
81 // the `errno` to EINVAL. In this case the `mode` param can only be "r" or
82 // "r+"
83 auto *fp2 = LIBC_NAMESPACE::fdopen(fd, "w");
84 ASSERT_ERRNO_EQ(EINVAL);
85 ASSERT_TRUE(nullptr == fp2);
86 libc_errno = 0;
87 LIBC_NAMESPACE::close(fd);
88 ASSERT_ERRNO_SUCCESS();
89}
90

source code of libc/test/src/stdio/fdopen_test.cpp