[libc] fix unit tests (#75361)

Fixes #75261

Author: nickdesaulniers

libc/test/src/fcntl/creat_test.cpp

@@ -13,6 +13,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcCreatTest, CreatAndOpen) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE = "testdata/creat.test";

libc/test/src/sys/resource/getrlimit_setrlimit_test.cpp

@@ -17,6 +17,7 @@
 #include "test/UnitTest/Test.h"
 
 #include <sys/resource.h>
+#include <sys/stat.h>
 
 TEST(LlvmLibcResourceLimitsTest, SetNoFileLimit) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;

libc/test/src/unistd/access_test.cpp

@@ -14,6 +14,7 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
 #include <unistd.h>
 
 TEST(LlvmLibcAccessTest, CreateAndTest) {

libc/test/src/unistd/dup2_test.cpp

@@ -16,6 +16,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcdupTest, ReadAndWriteViaDup) {
   constexpr int DUPFD = 0xD0;
   libc_errno = 0;

libc/test/src/unistd/dup3_test.cpp

@@ -16,6 +16,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 // The tests here are exactly the same as those of dup2. We only test the
 // plumbing of the dup3 syscall and not the dup3 functionality itself as it is
 // a simple syscall wrapper. Testing dup3 functionality is beyond the scope of

libc/test/src/unistd/dup_test.cpp

@@ -16,6 +16,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcdupTest, ReadAndWriteViaDup) {
   libc_errno = 0;
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;

libc/test/src/unistd/ftruncate_test.cpp

@@ -17,6 +17,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 namespace cpp = LIBC_NAMESPACE::cpp;
 
 TEST(LlvmLibcFtruncateTest, CreateAndTruncate) {

libc/test/src/unistd/isatty_test.cpp

@@ -13,6 +13,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
 

libc/test/src/unistd/link_test.cpp

@@ -14,6 +14,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcLinkTest, CreateAndUnlink) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE = "testdata/link.test";

libc/test/src/unistd/linkat_test.cpp

@@ -14,6 +14,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcLinkatTest, CreateAndUnlink) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_DIR = "testdata";

libc/test/src/unistd/pread_pwrite_test.cpp

@@ -17,6 +17,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcUniStd, PWriteAndPReadBackTest) {
   // The strategy here is that we first create a file and write to it. Next,
   // we open that file again and write at an offset. Finally, we open the

libc/test/src/unistd/read_write_test.cpp

@@ -15,6 +15,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcUniStd, WriteAndReadBackTest) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE = "__unistd_read_write.test";

libc/test/src/unistd/symlink_test.cpp

@@ -14,6 +14,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcSymlinkTest, CreateAndUnlink) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE_BASE = "symlink.test";

libc/test/src/unistd/symlinkat_test.cpp

@@ -14,6 +14,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcSymlinkatTest, CreateAndUnlink) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_DIR = "testdata";

libc/test/src/unistd/syscall_test.cpp

@@ -12,6 +12,7 @@
 #include "test/UnitTest/Test.h"
 
 #include <fcntl.h>
+#include <sys/stat.h>    // For S_* flags.
 #include <sys/syscall.h> // For syscall numbers.
 #include <unistd.h>
 

libc/test/src/unistd/truncate_test.cpp

@@ -17,6 +17,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 namespace cpp = LIBC_NAMESPACE::cpp;
 
 TEST(LlvmLibcTruncateTest, CreateAndTruncate) {

libc/test/src/unistd/unlink_test.cpp

@@ -13,6 +13,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcUnlinkTest, CreateAndUnlink) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_FILE = "testdata/unlink.test";

libc/test/src/unistd/unlinkat_test.cpp

@@ -14,6 +14,8 @@
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
+#include <sys/stat.h>
+
 TEST(LlvmLibcUnlinkatTest, CreateAndDeleteTest) {
   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
   constexpr const char *TEST_DIR = "testdata";