1 //===-- Unittests for chmod -----------------------------------------------===// 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/sys/stat/chmod.h" 12 #include "src/unistd/close.h" 13 #include "src/unistd/write.h" 14 #include "test/ErrnoSetterMatcher.h" 15 #include "test/UnitTest/Test.h" 16 17 #include <fcntl.h> 18 #include <sys/stat.h> 19 20 TEST(LlvmLibcChmodTest, ChangeAndOpen) { 21 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 22 using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; 23 24 // The test file is initially writable. We open it for writing and ensure 25 // that it indeed can be opened for writing. Next, we close the file and 26 // make it readonly using chmod. We test that chmod actually succeeded by 27 // trying to open the file for writing and failing. 28 constexpr const char *TEST_FILE = "testdata/chmod.test"; 29 const char WRITE_DATA[] = "test data"; 30 constexpr ssize_t WRITE_SIZE = ssize_t(sizeof(WRITE_DATA)); 31 libc_errno = 0; 32 33 int fd = __llvm_libc::open(TEST_FILE, O_APPEND | O_WRONLY); 34 ASSERT_GT(fd, 0); 35 ASSERT_EQ(libc_errno, 0); 36 ASSERT_EQ(__llvm_libc::write(fd, WRITE_DATA, sizeof(WRITE_DATA)), WRITE_SIZE); 37 ASSERT_THAT(__llvm_libc::close(fd), Succeeds(0)); 38 39 fd = __llvm_libc::open(TEST_FILE, O_PATH); 40 ASSERT_GT(fd, 0); 41 ASSERT_EQ(libc_errno, 0); 42 ASSERT_THAT(__llvm_libc::close(fd), Succeeds(0)); 43 EXPECT_THAT(__llvm_libc::chmod(TEST_FILE, S_IRUSR), Succeeds(0)); 44 45 // Opening for writing should fail. 46 EXPECT_EQ(__llvm_libc::open(TEST_FILE, O_APPEND | O_WRONLY), -1); 47 EXPECT_NE(libc_errno, 0); 48 libc_errno = 0; 49 // But opening for reading should succeed. 50 fd = __llvm_libc::open(TEST_FILE, O_APPEND | O_RDONLY); 51 EXPECT_GT(fd, 0); 52 EXPECT_EQ(libc_errno, 0); 53 54 EXPECT_THAT(__llvm_libc::close(fd), Succeeds(0)); 55 EXPECT_THAT(__llvm_libc::chmod(TEST_FILE, S_IRWXU), Succeeds(0)); 56 } 57 58 TEST(LlvmLibcChmodTest, NonExistentFile) { 59 libc_errno = 0; 60 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 61 ASSERT_THAT(__llvm_libc::chmod("non-existent-file", S_IRUSR), Fails(ENOENT)); 62 libc_errno = 0; 63 } 64