1//===-- Unittests for isatty ----------------------------------------------===//
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/fcntl/open.h"
10#include "src/unistd/close.h"
11#include "src/unistd/isatty.h"
12#include "test/UnitTest/ErrnoCheckingTest.h"
13#include "test/UnitTest/ErrnoSetterMatcher.h"
14#include "test/UnitTest/Test.h"
15
16#include <sys/stat.h>
17
18using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
19using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
20using LlvmLibcIsATTYTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
21
22TEST_F(LlvmLibcIsATTYTest, StdInOutTests) {
23 // If stdin is connected to a terminal, assume that all of the standard i/o
24 // fds are.
25 if (LIBC_NAMESPACE::isatty(0)) {
26 EXPECT_THAT(LIBC_NAMESPACE::isatty(0), Succeeds(1)); // stdin
27 EXPECT_THAT(LIBC_NAMESPACE::isatty(1), Succeeds(1)); // stdout
28 EXPECT_THAT(LIBC_NAMESPACE::isatty(2), Succeeds(1)); // stderr
29 } else {
30 EXPECT_THAT(LIBC_NAMESPACE::isatty(0), Fails(ENOTTY, 0)); // stdin
31 EXPECT_THAT(LIBC_NAMESPACE::isatty(1), Fails(ENOTTY, 0)); // stdout
32 EXPECT_THAT(LIBC_NAMESPACE::isatty(2), Fails(ENOTTY, 0)); // stderr
33 }
34}
35
36TEST_F(LlvmLibcIsATTYTest, BadFdTest) {
37 EXPECT_THAT(LIBC_NAMESPACE::isatty(-1), Fails(EBADF, 0)); // invalid fd
38}
39
40TEST_F(LlvmLibcIsATTYTest, DevTTYTest) {
41 constexpr const char *FILENAME = "/dev/tty";
42 auto TTY_FILE = libc_make_test_file_path(FILENAME);
43 int fd = LIBC_NAMESPACE::open(TTY_FILE, O_RDONLY);
44 if (fd > 0) {
45 ASSERT_ERRNO_SUCCESS();
46 EXPECT_THAT(LIBC_NAMESPACE::isatty(fd), Succeeds(1));
47 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
48 } else {
49 ASSERT_ERRNO_FAILURE();
50 }
51}
52
53TEST_F(LlvmLibcIsATTYTest, FileTest) {
54 constexpr const char *FILENAME = "isatty.test";
55 auto TEST_FILE = libc_make_test_file_path(FILENAME);
56 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
57 ASSERT_ERRNO_SUCCESS();
58 ASSERT_GT(fd, 0);
59 EXPECT_THAT(LIBC_NAMESPACE::isatty(fd), Fails(ENOTTY, 0));
60 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
61}
62

source code of libc/test/src/unistd/isatty_test.cpp