1 //===- llvm/unittest/Support/Path.cpp - Path tests ------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/Path.h"
11 #include "llvm/ADT/SmallVector.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/Triple.h"
14 #include "llvm/Support/ConvertUTF.h"
15 #include "llvm/Support/Errc.h"
16 #include "llvm/Support/ErrorHandling.h"
17 #include "llvm/Support/FileSystem.h"
18 #include "llvm/Support/FileUtilities.h"
19 #include "llvm/Support/Host.h"
20 #include "llvm/Support/MemoryBuffer.h"
21 #include "llvm/Support/raw_ostream.h"
22 #include "gtest/gtest.h"
23 
24 #ifdef LLVM_ON_WIN32
25 #include "llvm/ADT/ArrayRef.h"
26 #include <windows.h>
27 #include <winerror.h>
28 #endif
29 
30 #ifdef LLVM_ON_UNIX
31 #include <sys/stat.h>
32 #endif
33 
34 using namespace llvm;
35 using namespace llvm::sys;
36 
37 #define ASSERT_NO_ERROR(x)                                                     \
38   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
39     SmallString<128> MessageStorage;                                           \
40     raw_svector_ostream Message(MessageStorage);                               \
41     Message << #x ": did not return errc::success.\n"                          \
42             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
43             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
44     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
45   } else {                                                                     \
46   }
47 
48 namespace {
49 
50 TEST(is_separator, Works) {
51   EXPECT_TRUE(path::is_separator('/'));
52   EXPECT_FALSE(path::is_separator('\0'));
53   EXPECT_FALSE(path::is_separator('-'));
54   EXPECT_FALSE(path::is_separator(' '));
55 
56 #ifdef LLVM_ON_WIN32
57   EXPECT_TRUE(path::is_separator('\\'));
58 #else
59   EXPECT_FALSE(path::is_separator('\\'));
60 #endif
61 }
62 
63 TEST(Support, Path) {
64   SmallVector<StringRef, 40> paths;
65   paths.push_back("");
66   paths.push_back(".");
67   paths.push_back("..");
68   paths.push_back("foo");
69   paths.push_back("/");
70   paths.push_back("/foo");
71   paths.push_back("foo/");
72   paths.push_back("/foo/");
73   paths.push_back("foo/bar");
74   paths.push_back("/foo/bar");
75   paths.push_back("//net");
76   paths.push_back("//net/foo");
77   paths.push_back("///foo///");
78   paths.push_back("///foo///bar");
79   paths.push_back("/.");
80   paths.push_back("./");
81   paths.push_back("/..");
82   paths.push_back("../");
83   paths.push_back("foo/.");
84   paths.push_back("foo/..");
85   paths.push_back("foo/./");
86   paths.push_back("foo/./bar");
87   paths.push_back("foo/..");
88   paths.push_back("foo/../");
89   paths.push_back("foo/../bar");
90   paths.push_back("c:");
91   paths.push_back("c:/");
92   paths.push_back("c:foo");
93   paths.push_back("c:/foo");
94   paths.push_back("c:foo/");
95   paths.push_back("c:/foo/");
96   paths.push_back("c:/foo/bar");
97   paths.push_back("prn:");
98   paths.push_back("c:\\");
99   paths.push_back("c:foo");
100   paths.push_back("c:\\foo");
101   paths.push_back("c:foo\\");
102   paths.push_back("c:\\foo\\");
103   paths.push_back("c:\\foo/");
104   paths.push_back("c:/foo\\bar");
105 
106   SmallVector<StringRef, 5> ComponentStack;
107   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
108                                                   e = paths.end();
109                                                   i != e;
110                                                   ++i) {
111     for (sys::path::const_iterator ci = sys::path::begin(*i),
112                                    ce = sys::path::end(*i);
113                                    ci != ce;
114                                    ++ci) {
115       ASSERT_FALSE(ci->empty());
116       ComponentStack.push_back(*ci);
117     }
118 
119     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
120                                      ce = sys::path::rend(*i);
121                                      ci != ce;
122                                      ++ci) {
123       ASSERT_TRUE(*ci == ComponentStack.back());
124       ComponentStack.pop_back();
125     }
126     ASSERT_TRUE(ComponentStack.empty());
127 
128     // Crash test most of the API - since we're iterating over all of our paths
129     // here there isn't really anything reasonable to assert on in the results.
130     (void)path::has_root_path(*i);
131     (void)path::root_path(*i);
132     (void)path::has_root_name(*i);
133     (void)path::root_name(*i);
134     (void)path::has_root_directory(*i);
135     (void)path::root_directory(*i);
136     (void)path::has_parent_path(*i);
137     (void)path::parent_path(*i);
138     (void)path::has_filename(*i);
139     (void)path::filename(*i);
140     (void)path::has_stem(*i);
141     (void)path::stem(*i);
142     (void)path::has_extension(*i);
143     (void)path::extension(*i);
144     (void)path::is_absolute(*i);
145     (void)path::is_relative(*i);
146 
147     SmallString<128> temp_store;
148     temp_store = *i;
149     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
150     temp_store = *i;
151     path::remove_filename(temp_store);
152 
153     temp_store = *i;
154     path::replace_extension(temp_store, "ext");
155     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
156     stem = path::stem(filename);
157     ext  = path::extension(filename);
158     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
159 
160     path::native(*i, temp_store);
161   }
162 
163   SmallString<32> Relative("foo.cpp");
164   ASSERT_NO_ERROR(sys::fs::make_absolute("/root", Relative));
165   Relative[5] = '/'; // Fix up windows paths.
166   ASSERT_EQ("/root/foo.cpp", Relative);
167 }
168 
169 TEST(Support, RelativePathIterator) {
170   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
171   typedef SmallVector<StringRef, 4> PathComponents;
172   PathComponents ExpectedPathComponents;
173   PathComponents ActualPathComponents;
174 
175   StringRef(Path).split(ExpectedPathComponents, '/');
176 
177   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
178        ++I) {
179     ActualPathComponents.push_back(*I);
180   }
181 
182   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
183 
184   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
185     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
186   }
187 }
188 
189 TEST(Support, RelativePathDotIterator) {
190   SmallString<64> Path(StringRef(".c/.d/../."));
191   typedef SmallVector<StringRef, 4> PathComponents;
192   PathComponents ExpectedPathComponents;
193   PathComponents ActualPathComponents;
194 
195   StringRef(Path).split(ExpectedPathComponents, '/');
196 
197   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
198        ++I) {
199     ActualPathComponents.push_back(*I);
200   }
201 
202   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
203 
204   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
205     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
206   }
207 }
208 
209 TEST(Support, AbsolutePathIterator) {
210   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
211   typedef SmallVector<StringRef, 4> PathComponents;
212   PathComponents ExpectedPathComponents;
213   PathComponents ActualPathComponents;
214 
215   StringRef(Path).split(ExpectedPathComponents, '/');
216 
217   // The root path will also be a component when iterating
218   ExpectedPathComponents[0] = "/";
219 
220   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
221        ++I) {
222     ActualPathComponents.push_back(*I);
223   }
224 
225   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
226 
227   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
228     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
229   }
230 }
231 
232 TEST(Support, AbsolutePathDotIterator) {
233   SmallString<64> Path(StringRef("/.c/.d/../."));
234   typedef SmallVector<StringRef, 4> PathComponents;
235   PathComponents ExpectedPathComponents;
236   PathComponents ActualPathComponents;
237 
238   StringRef(Path).split(ExpectedPathComponents, '/');
239 
240   // The root path will also be a component when iterating
241   ExpectedPathComponents[0] = "/";
242 
243   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
244        ++I) {
245     ActualPathComponents.push_back(*I);
246   }
247 
248   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
249 
250   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
251     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
252   }
253 }
254 
255 #ifdef LLVM_ON_WIN32
256 TEST(Support, AbsolutePathIteratorWin32) {
257   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
258   typedef SmallVector<StringRef, 4> PathComponents;
259   PathComponents ExpectedPathComponents;
260   PathComponents ActualPathComponents;
261 
262   StringRef(Path).split(ExpectedPathComponents, "\\");
263 
264   // The root path (which comes after the drive name) will also be a component
265   // when iterating.
266   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
267 
268   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
269        ++I) {
270     ActualPathComponents.push_back(*I);
271   }
272 
273   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
274 
275   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
276     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
277   }
278 }
279 #endif // LLVM_ON_WIN32
280 
281 TEST(Support, AbsolutePathIteratorEnd) {
282   // Trailing slashes are converted to '.' unless they are part of the root path.
283   SmallVector<StringRef, 4> Paths;
284   Paths.push_back("/foo/");
285   Paths.push_back("/foo//");
286   Paths.push_back("//net//");
287 #ifdef LLVM_ON_WIN32
288   Paths.push_back("c:\\\\");
289 #endif
290 
291   for (StringRef Path : Paths) {
292     StringRef LastComponent = *path::rbegin(Path);
293     EXPECT_EQ(".", LastComponent);
294   }
295 
296   SmallVector<StringRef, 3> RootPaths;
297   RootPaths.push_back("/");
298   RootPaths.push_back("//net/");
299 #ifdef LLVM_ON_WIN32
300   RootPaths.push_back("c:\\");
301 #endif
302 
303   for (StringRef Path : RootPaths) {
304     StringRef LastComponent = *path::rbegin(Path);
305     EXPECT_EQ(1u, LastComponent.size());
306     EXPECT_TRUE(path::is_separator(LastComponent[0]));
307   }
308 }
309 
310 TEST(Support, HomeDirectory) {
311   std::string expected;
312 #ifdef LLVM_ON_WIN32
313   if (wchar_t const *path = ::_wgetenv(L"USERPROFILE")) {
314     auto pathLen = ::wcslen(path);
315     ArrayRef<char> ref{reinterpret_cast<char const *>(path),
316                        pathLen * sizeof(wchar_t)};
317     convertUTF16ToUTF8String(ref, expected);
318   }
319 #else
320   if (char const *path = ::getenv("HOME"))
321     expected = path;
322 #endif
323   // Do not try to test it if we don't know what to expect.
324   // On Windows we use something better than env vars.
325   if (!expected.empty()) {
326     SmallString<128> HomeDir;
327     auto status = path::home_directory(HomeDir);
328     EXPECT_TRUE(status);
329     EXPECT_EQ(expected, HomeDir);
330   }
331 }
332 
333 TEST(Support, UserCacheDirectory) {
334   SmallString<13> CacheDir;
335   SmallString<20> CacheDir2;
336   auto Status = path::user_cache_directory(CacheDir, "");
337   EXPECT_TRUE(Status ^ CacheDir.empty());
338 
339   if (Status) {
340     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "")); // should succeed
341     EXPECT_EQ(CacheDir, CacheDir2); // and return same paths
342 
343     EXPECT_TRUE(path::user_cache_directory(CacheDir, "A", "B", "file.c"));
344     auto It = path::rbegin(CacheDir);
345     EXPECT_EQ("file.c", *It);
346     EXPECT_EQ("B", *++It);
347     EXPECT_EQ("A", *++It);
348     auto ParentDir = *++It;
349 
350     // Test Unicode: "<user_cache_dir>/(pi)r^2/aleth.0"
351     EXPECT_TRUE(path::user_cache_directory(CacheDir2, "\xCF\x80r\xC2\xB2",
352                                            "\xE2\x84\xB5.0"));
353     auto It2 = path::rbegin(CacheDir2);
354     EXPECT_EQ("\xE2\x84\xB5.0", *It2);
355     EXPECT_EQ("\xCF\x80r\xC2\xB2", *++It2);
356     auto ParentDir2 = *++It2;
357 
358     EXPECT_EQ(ParentDir, ParentDir2);
359   }
360 }
361 
362 TEST(Support, TempDirectory) {
363   SmallString<32> TempDir;
364   path::system_temp_directory(false, TempDir);
365   EXPECT_TRUE(!TempDir.empty());
366   TempDir.clear();
367   path::system_temp_directory(true, TempDir);
368   EXPECT_TRUE(!TempDir.empty());
369 }
370 
371 #ifdef LLVM_ON_WIN32
372 static std::string path2regex(std::string Path) {
373   size_t Pos = 0;
374   while ((Pos = Path.find('\\', Pos)) != std::string::npos) {
375     Path.replace(Pos, 1, "\\\\");
376     Pos += 2;
377   }
378   return Path;
379 }
380 
381 /// Helper for running temp dir test in separated process. See below.
382 #define EXPECT_TEMP_DIR(prepare, expected)                                     \
383   EXPECT_EXIT(                                                                 \
384       {                                                                        \
385         prepare;                                                               \
386         SmallString<300> TempDir;                                              \
387         path::system_temp_directory(true, TempDir);                            \
388         raw_os_ostream(std::cerr) << TempDir;                                  \
389         std::exit(0);                                                          \
390       },                                                                       \
391       ::testing::ExitedWithCode(0), path2regex(expected))
392 
393 TEST(SupportDeathTest, TempDirectoryOnWindows) {
394   // In this test we want to check how system_temp_directory responds to
395   // different values of specific env vars. To prevent corrupting env vars of
396   // the current process all checks are done in separated processes.
397   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:\\OtherFolder"), "C:\\OtherFolder");
398   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"C:/Unix/Path/Seperators"),
399                   "C:\\Unix\\Path\\Seperators");
400   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"Local Path"), ".+\\Local Path$");
401   EXPECT_TEMP_DIR(_wputenv_s(L"TMP", L"F:\\TrailingSep\\"), "F:\\TrailingSep");
402   EXPECT_TEMP_DIR(
403       _wputenv_s(L"TMP", L"C:\\2\x03C0r-\x00B5\x00B3\\\x2135\x2080"),
404       "C:\\2\xCF\x80r-\xC2\xB5\xC2\xB3\\\xE2\x84\xB5\xE2\x82\x80");
405 
406   // Test $TMP empty, $TEMP set.
407   EXPECT_TEMP_DIR(
408       {
409         _wputenv_s(L"TMP", L"");
410         _wputenv_s(L"TEMP", L"C:\\Valid\\Path");
411       },
412       "C:\\Valid\\Path");
413 
414   // All related env vars empty
415   EXPECT_TEMP_DIR(
416   {
417     _wputenv_s(L"TMP", L"");
418     _wputenv_s(L"TEMP", L"");
419     _wputenv_s(L"USERPROFILE", L"");
420   },
421     "C:\\Temp");
422 
423   // Test evn var / path with 260 chars.
424   SmallString<270> Expected{"C:\\Temp\\AB\\123456789"};
425   while (Expected.size() < 260)
426     Expected.append("\\DirNameWith19Charss");
427   ASSERT_EQ(260U, Expected.size());
428   EXPECT_TEMP_DIR(_putenv_s("TMP", Expected.c_str()), Expected.c_str());
429 }
430 #endif
431 
432 class FileSystemTest : public testing::Test {
433 protected:
434   /// Unique temporary directory in which all created filesystem entities must
435   /// be placed. It is removed at the end of each test (must be empty).
436   SmallString<128> TestDirectory;
437 
438   void SetUp() override {
439     ASSERT_NO_ERROR(
440         fs::createUniqueDirectory("file-system-test", TestDirectory));
441     // We don't care about this specific file.
442     errs() << "Test Directory: " << TestDirectory << '\n';
443     errs().flush();
444   }
445 
446   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
447 
448   SmallVector<Triple::ArchType, 4> UnsupportedArchs;
449   SmallVector<Triple::OSType, 4> UnsupportedOSs;
450   SmallVector<Triple::EnvironmentType, 1> UnsupportedEnvironments;
451 
452   bool isUnsupportedOSOrEnvironment() {
453     Triple Host(Triple::normalize(sys::getProcessTriple()));
454 
455     if (find(UnsupportedEnvironments, Host.getEnvironment()) !=
456         UnsupportedEnvironments.end())
457       return true;
458 
459     if (is_contained(UnsupportedOSs, Host.getOS()))
460       return true;
461 
462     if (is_contained(UnsupportedArchs, Host.getArch()))
463       return true;
464 
465     return false;
466   }
467 
468   FileSystemTest() {
469     UnsupportedArchs.push_back(Triple::mips);
470     UnsupportedArchs.push_back(Triple::mipsel);
471   }
472 };
473 
474 TEST_F(FileSystemTest, Unique) {
475   // Create a temp file.
476   int FileDescriptor;
477   SmallString<64> TempPath;
478   ASSERT_NO_ERROR(
479       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
480 
481   // The same file should return an identical unique id.
482   fs::UniqueID F1, F2;
483   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
484   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
485   ASSERT_EQ(F1, F2);
486 
487   // Different files should return different unique ids.
488   int FileDescriptor2;
489   SmallString<64> TempPath2;
490   ASSERT_NO_ERROR(
491       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
492 
493   fs::UniqueID D;
494   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
495   ASSERT_NE(D, F1);
496   ::close(FileDescriptor2);
497 
498   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
499 
500   // Two paths representing the same file on disk should still provide the
501   // same unique id.  We can test this by making a hard link.
502   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
503   fs::UniqueID D2;
504   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
505   ASSERT_EQ(D2, F1);
506 
507   ::close(FileDescriptor);
508 
509   SmallString<128> Dir1;
510   ASSERT_NO_ERROR(
511      fs::createUniqueDirectory("dir1", Dir1));
512   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
513   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
514   ASSERT_EQ(F1, F2);
515 
516   SmallString<128> Dir2;
517   ASSERT_NO_ERROR(
518      fs::createUniqueDirectory("dir2", Dir2));
519   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
520   ASSERT_NE(F1, F2);
521   ASSERT_NO_ERROR(fs::remove(Dir1));
522   ASSERT_NO_ERROR(fs::remove(Dir2));
523   ASSERT_NO_ERROR(fs::remove(TempPath2));
524   ASSERT_NO_ERROR(fs::remove(TempPath));
525 }
526 
527 TEST_F(FileSystemTest, TempFiles) {
528   // Create a temp file.
529   int FileDescriptor;
530   SmallString<64> TempPath;
531   ASSERT_NO_ERROR(
532       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
533 
534   // Make sure it exists.
535   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
536 
537   // Create another temp tile.
538   int FD2;
539   SmallString<64> TempPath2;
540   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
541   ASSERT_TRUE(TempPath2.endswith(".temp"));
542   ASSERT_NE(TempPath.str(), TempPath2.str());
543 
544   fs::file_status A, B;
545   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
546   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
547   EXPECT_FALSE(fs::equivalent(A, B));
548 
549   ::close(FD2);
550 
551   // Remove Temp2.
552   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
553   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
554   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
555             errc::no_such_file_or_directory);
556 
557   std::error_code EC = fs::status(TempPath2.c_str(), B);
558   EXPECT_EQ(EC, errc::no_such_file_or_directory);
559   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
560 
561   // Make sure Temp2 doesn't exist.
562   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
563             errc::no_such_file_or_directory);
564 
565   SmallString<64> TempPath3;
566   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
567   ASSERT_FALSE(TempPath3.endswith("."));
568   FileRemover Cleanup3(TempPath3);
569 
570   // Create a hard link to Temp1.
571   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
572   bool equal;
573   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
574   EXPECT_TRUE(equal);
575   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
576   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
577   EXPECT_TRUE(fs::equivalent(A, B));
578 
579   // Remove Temp1.
580   ::close(FileDescriptor);
581   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
582 
583   // Remove the hard link.
584   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
585 
586   // Make sure Temp1 doesn't exist.
587   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
588             errc::no_such_file_or_directory);
589 
590 #ifdef LLVM_ON_WIN32
591   // Path name > 260 chars should get an error.
592   const char *Path270 =
593     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
594     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
595     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
596     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
597     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
598   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
599             errc::invalid_argument);
600   // Relative path < 247 chars, no problem.
601   const char *Path216 =
602     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
603     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
604     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
605     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
606   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
607   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
608 #endif
609 }
610 
611 TEST_F(FileSystemTest, CreateDir) {
612   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
613   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
614   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
615             errc::file_exists);
616   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
617 
618 #ifdef LLVM_ON_UNIX
619   // Set a 0000 umask so that we can test our directory permissions.
620   mode_t OldUmask = ::umask(0000);
621 
622   fs::file_status Status;
623   ASSERT_NO_ERROR(
624       fs::create_directory(Twine(TestDirectory) + "baz500", false,
625                            fs::perms::owner_read | fs::perms::owner_exe));
626   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
627   ASSERT_EQ(Status.permissions() & fs::perms::all_all,
628             fs::perms::owner_read | fs::perms::owner_exe);
629   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
630                                        fs::perms::all_all));
631   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
632   ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
633 
634   // Restore umask to be safe.
635   ::umask(OldUmask);
636 #endif
637 
638 #ifdef LLVM_ON_WIN32
639   // Prove that create_directories() can handle a pathname > 248 characters,
640   // which is the documented limit for CreateDirectory().
641   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
642   // Generate a directory path guaranteed to fall into that range.
643   size_t TmpLen = TestDirectory.size();
644   const char *OneDir = "\\123456789";
645   size_t OneDirLen = strlen(OneDir);
646   ASSERT_LT(OneDirLen, 12U);
647   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
648   SmallString<260> LongDir(TestDirectory);
649   for (size_t I = 0; I < NLevels; ++I)
650     LongDir.append(OneDir);
651   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
652   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
653   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
654             errc::file_exists);
655   // Tidy up, "recursively" removing the directories.
656   StringRef ThisDir(LongDir);
657   for (size_t J = 0; J < NLevels; ++J) {
658     ASSERT_NO_ERROR(fs::remove(ThisDir));
659     ThisDir = path::parent_path(ThisDir);
660   }
661 
662   // Similarly for a relative pathname.  Need to set the current directory to
663   // TestDirectory so that the one we create ends up in the right place.
664   char PreviousDir[260];
665   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
666   ASSERT_GT(PreviousDirLen, 0U);
667   ASSERT_LT(PreviousDirLen, 260U);
668   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
669   LongDir.clear();
670   // Generate a relative directory name with absolute length > 248.
671   size_t LongDirLen = 249 - TestDirectory.size();
672   LongDir.assign(LongDirLen, 'a');
673   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
674   // While we're here, prove that .. and . handling works in these long paths.
675   const char *DotDotDirs = "\\..\\.\\b";
676   LongDir.append(DotDotDirs);
677   ASSERT_NO_ERROR(fs::create_directory("b"));
678   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
679   // And clean up.
680   ASSERT_NO_ERROR(fs::remove("b"));
681   ASSERT_NO_ERROR(fs::remove(
682     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
683   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
684 #endif
685 }
686 
687 TEST_F(FileSystemTest, DirectoryIteration) {
688   std::error_code ec;
689   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
690     ASSERT_NO_ERROR(ec);
691 
692   // Create a known hierarchy to recurse over.
693   ASSERT_NO_ERROR(
694       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
695   ASSERT_NO_ERROR(
696       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
697   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
698                                          "/recursive/dontlookhere/da1"));
699   ASSERT_NO_ERROR(
700       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
701   ASSERT_NO_ERROR(
702       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
703   typedef std::vector<std::string> v_t;
704   v_t visited;
705   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
706          + "/recursive", ec), e; i != e; i.increment(ec)){
707     ASSERT_NO_ERROR(ec);
708     if (path::filename(i->path()) == "p1") {
709       i.pop();
710       // FIXME: recursive_directory_iterator should be more robust.
711       if (i == e) break;
712     }
713     if (path::filename(i->path()) == "dontlookhere")
714       i.no_push();
715     visited.push_back(path::filename(i->path()));
716   }
717   v_t::const_iterator a0 = find(visited, "a0");
718   v_t::const_iterator aa1 = find(visited, "aa1");
719   v_t::const_iterator ab1 = find(visited, "ab1");
720   v_t::const_iterator dontlookhere = find(visited, "dontlookhere");
721   v_t::const_iterator da1 = find(visited, "da1");
722   v_t::const_iterator z0 = find(visited, "z0");
723   v_t::const_iterator za1 = find(visited, "za1");
724   v_t::const_iterator pop = find(visited, "pop");
725   v_t::const_iterator p1 = find(visited, "p1");
726 
727   // Make sure that each path was visited correctly.
728   ASSERT_NE(a0, visited.end());
729   ASSERT_NE(aa1, visited.end());
730   ASSERT_NE(ab1, visited.end());
731   ASSERT_NE(dontlookhere, visited.end());
732   ASSERT_EQ(da1, visited.end()); // Not visited.
733   ASSERT_NE(z0, visited.end());
734   ASSERT_NE(za1, visited.end());
735   ASSERT_NE(pop, visited.end());
736   ASSERT_EQ(p1, visited.end()); // Not visited.
737 
738   // Make sure that parents were visited before children. No other ordering
739   // guarantees can be made across siblings.
740   ASSERT_LT(a0, aa1);
741   ASSERT_LT(a0, ab1);
742   ASSERT_LT(z0, za1);
743 
744   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
745   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
746   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
747   ASSERT_NO_ERROR(
748       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
749   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
750   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
751   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
752   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
753   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
754   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
755 
756   // Test recursive_directory_iterator level()
757   ASSERT_NO_ERROR(
758       fs::create_directories(Twine(TestDirectory) + "/reclevel/a/b/c"));
759   fs::recursive_directory_iterator I(Twine(TestDirectory) + "/reclevel", ec), E;
760   for (int l = 0; I != E; I.increment(ec), ++l) {
761     ASSERT_NO_ERROR(ec);
762     EXPECT_EQ(I.level(), l);
763   }
764   EXPECT_EQ(I, E);
765   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b/c"));
766   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a/b"));
767   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel/a"));
768   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel"));
769 }
770 
771 const char archive[] = "!<arch>\x0A";
772 const char bitcode[] = "\xde\xc0\x17\x0b";
773 const char coff_object[] = "\x00\x00......";
774 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
775     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
776 const char coff_import_library[] = "\x00\x00\xff\xff....";
777 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
778                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
779 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\x00";
780 const char macho_object[] =
781     "\xfe\xed\xfa\xce........\x00\x00\x00\x01............";
782 const char macho_executable[] =
783     "\xfe\xed\xfa\xce........\x00\x00\x00\x02............";
784 const char macho_fixed_virtual_memory_shared_lib[] =
785     "\xfe\xed\xfa\xce........\x00\x00\x00\x03............";
786 const char macho_core[] =
787     "\xfe\xed\xfa\xce........\x00\x00\x00\x04............";
788 const char macho_preload_executable[] =
789     "\xfe\xed\xfa\xce........\x00\x00\x00\x05............";
790 const char macho_dynamically_linked_shared_lib[] =
791     "\xfe\xed\xfa\xce........\x00\x00\x00\x06............";
792 const char macho_dynamic_linker[] =
793     "\xfe\xed\xfa\xce........\x00\x00\x00\x07............";
794 const char macho_bundle[] =
795     "\xfe\xed\xfa\xce........\x00\x00\x00\x08............";
796 const char macho_dsym_companion[] =
797     "\xfe\xed\xfa\xce........\x00\x00\x00\x0a............";
798 const char macho_kext_bundle[] =
799     "\xfe\xed\xfa\xce........\x00\x00\x00\x0b............";
800 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
801 const char macho_dynamically_linked_shared_lib_stub[] =
802     "\xfe\xed\xfa\xce........\x00\x00\x00\x09............";
803 
804 TEST_F(FileSystemTest, Magic) {
805   struct type {
806     const char *filename;
807     const char *magic_str;
808     size_t magic_str_len;
809     fs::file_magic magic;
810   } types[] = {
811 #define DEFINE(magic)                                           \
812     { #magic, magic, sizeof(magic), fs::file_magic::magic }
813     DEFINE(archive),
814     DEFINE(bitcode),
815     DEFINE(coff_object),
816     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
817     DEFINE(coff_import_library),
818     DEFINE(elf_relocatable),
819     DEFINE(macho_universal_binary),
820     DEFINE(macho_object),
821     DEFINE(macho_executable),
822     DEFINE(macho_fixed_virtual_memory_shared_lib),
823     DEFINE(macho_core),
824     DEFINE(macho_preload_executable),
825     DEFINE(macho_dynamically_linked_shared_lib),
826     DEFINE(macho_dynamic_linker),
827     DEFINE(macho_bundle),
828     DEFINE(macho_dynamically_linked_shared_lib_stub),
829     DEFINE(macho_dsym_companion),
830     DEFINE(macho_kext_bundle),
831     DEFINE(windows_resource)
832 #undef DEFINE
833     };
834 
835   // Create some files filled with magic.
836   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
837                                                                      ++i) {
838     SmallString<128> file_pathname(TestDirectory);
839     path::append(file_pathname, i->filename);
840     std::error_code EC;
841     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
842     ASSERT_FALSE(file.has_error());
843     StringRef magic(i->magic_str, i->magic_str_len);
844     file << magic;
845     file.close();
846     EXPECT_EQ(i->magic, fs::identify_magic(magic));
847     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
848   }
849 }
850 
851 #ifdef LLVM_ON_WIN32
852 TEST_F(FileSystemTest, CarriageReturn) {
853   SmallString<128> FilePathname(TestDirectory);
854   std::error_code EC;
855   path::append(FilePathname, "test");
856 
857   {
858     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
859     ASSERT_NO_ERROR(EC);
860     File << '\n';
861   }
862   {
863     auto Buf = MemoryBuffer::getFile(FilePathname.str());
864     EXPECT_TRUE((bool)Buf);
865     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
866   }
867 
868   {
869     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
870     ASSERT_NO_ERROR(EC);
871     File << '\n';
872   }
873   {
874     auto Buf = MemoryBuffer::getFile(FilePathname.str());
875     EXPECT_TRUE((bool)Buf);
876     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
877   }
878   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
879 }
880 #endif
881 
882 TEST_F(FileSystemTest, Resize) {
883   int FD;
884   SmallString<64> TempPath;
885   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
886   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
887   fs::file_status Status;
888   ASSERT_NO_ERROR(fs::status(FD, Status));
889   ASSERT_EQ(Status.getSize(), 123U);
890   ::close(FD);
891   ASSERT_NO_ERROR(fs::remove(TempPath));
892 }
893 
894 TEST_F(FileSystemTest, FileMapping) {
895   // Create a temp file.
896   int FileDescriptor;
897   SmallString<64> TempPath;
898   ASSERT_NO_ERROR(
899       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
900   unsigned Size = 4096;
901   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
902 
903   // Map in temp file and add some content
904   std::error_code EC;
905   StringRef Val("hello there");
906   {
907     fs::mapped_file_region mfr(FileDescriptor,
908                                fs::mapped_file_region::readwrite, Size, 0, EC);
909     ASSERT_NO_ERROR(EC);
910     std::copy(Val.begin(), Val.end(), mfr.data());
911     // Explicitly add a 0.
912     mfr.data()[Val.size()] = 0;
913     // Unmap temp file
914   }
915   ASSERT_EQ(close(FileDescriptor), 0);
916 
917   // Map it back in read-only
918   {
919     int FD;
920     EC = fs::openFileForRead(Twine(TempPath), FD);
921     ASSERT_NO_ERROR(EC);
922     fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
923     ASSERT_NO_ERROR(EC);
924 
925     // Verify content
926     EXPECT_EQ(StringRef(mfr.const_data()), Val);
927 
928     // Unmap temp file
929     fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
930     ASSERT_NO_ERROR(EC);
931     ASSERT_EQ(close(FD), 0);
932   }
933   ASSERT_NO_ERROR(fs::remove(TempPath));
934 }
935 
936 TEST(Support, NormalizePath) {
937 #if defined(LLVM_ON_WIN32)
938 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
939   EXPECT_EQ(path__, windows__);
940 #else
941 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
942   EXPECT_EQ(path__, not_windows__);
943 #endif
944 
945   SmallString<64> Path1("a");
946   SmallString<64> Path2("a/b");
947   SmallString<64> Path3("a\\b");
948   SmallString<64> Path4("a\\\\b");
949   SmallString<64> Path5("\\a");
950   SmallString<64> Path6("a\\");
951 
952   path::native(Path1);
953   EXPECT_PATH_IS(Path1, "a", "a");
954 
955   path::native(Path2);
956   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
957 
958   path::native(Path3);
959   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
960 
961   path::native(Path4);
962   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
963 
964   path::native(Path5);
965   EXPECT_PATH_IS(Path5, "\\a", "/a");
966 
967   path::native(Path6);
968   EXPECT_PATH_IS(Path6, "a\\", "a/");
969 
970 #undef EXPECT_PATH_IS
971 
972 #if defined(LLVM_ON_WIN32)
973   SmallString<64> PathHome;
974   path::home_directory(PathHome);
975 
976   const char *Path7a = "~/aaa";
977   SmallString<64> Path7(Path7a);
978   path::native(Path7);
979   EXPECT_TRUE(Path7.endswith("\\aaa"));
980   EXPECT_TRUE(Path7.startswith(PathHome));
981   EXPECT_EQ(Path7.size(), PathHome.size() + strlen(Path7a + 1));
982 
983   const char *Path8a = "~";
984   SmallString<64> Path8(Path8a);
985   path::native(Path8);
986   EXPECT_EQ(Path8, PathHome);
987 
988   const char *Path9a = "~aaa";
989   SmallString<64> Path9(Path9a);
990   path::native(Path9);
991   EXPECT_EQ(Path9, "~aaa");
992 
993   const char *Path10a = "aaa/~/b";
994   SmallString<64> Path10(Path10a);
995   path::native(Path10);
996   EXPECT_EQ(Path10, "aaa\\~\\b");
997 #endif
998 }
999 
1000 TEST(Support, RemoveLeadingDotSlash) {
1001   StringRef Path1("././/foolz/wat");
1002   StringRef Path2("./////");
1003 
1004   Path1 = path::remove_leading_dotslash(Path1);
1005   EXPECT_EQ(Path1, "foolz/wat");
1006   Path2 = path::remove_leading_dotslash(Path2);
1007   EXPECT_EQ(Path2, "");
1008 }
1009 
1010 static std::string remove_dots(StringRef path,
1011     bool remove_dot_dot) {
1012   SmallString<256> buffer(path);
1013   path::remove_dots(buffer, remove_dot_dot);
1014   return buffer.str();
1015 }
1016 
1017 TEST(Support, RemoveDots) {
1018 #if defined(LLVM_ON_WIN32)
1019   EXPECT_EQ("foolz\\wat", remove_dots(".\\.\\\\foolz\\wat", false));
1020   EXPECT_EQ("", remove_dots(".\\\\\\\\\\", false));
1021 
1022   EXPECT_EQ("a\\..\\b\\c", remove_dots(".\\a\\..\\b\\c", false));
1023   EXPECT_EQ("b\\c", remove_dots(".\\a\\..\\b\\c", true));
1024   EXPECT_EQ("c", remove_dots(".\\.\\c", true));
1025   EXPECT_EQ("..\\a\\c", remove_dots("..\\a\\b\\..\\c", true));
1026   EXPECT_EQ("..\\..\\a\\c", remove_dots("..\\..\\a\\b\\..\\c", true));
1027 
1028   SmallString<64> Path1(".\\.\\c");
1029   EXPECT_TRUE(path::remove_dots(Path1, true));
1030   EXPECT_EQ("c", Path1);
1031 #else
1032   EXPECT_EQ("foolz/wat", remove_dots("././/foolz/wat", false));
1033   EXPECT_EQ("", remove_dots("./////", false));
1034 
1035   EXPECT_EQ("a/../b/c", remove_dots("./a/../b/c", false));
1036   EXPECT_EQ("b/c", remove_dots("./a/../b/c", true));
1037   EXPECT_EQ("c", remove_dots("././c", true));
1038   EXPECT_EQ("../a/c", remove_dots("../a/b/../c", true));
1039   EXPECT_EQ("../../a/c", remove_dots("../../a/b/../c", true));
1040   EXPECT_EQ("/a/c", remove_dots("/../../a/c", true));
1041   EXPECT_EQ("/a/c", remove_dots("/../a/b//../././/c", true));
1042 
1043   SmallString<64> Path1("././c");
1044   EXPECT_TRUE(path::remove_dots(Path1, true));
1045   EXPECT_EQ("c", Path1);
1046 #endif
1047 }
1048 
1049 TEST(Support, ReplacePathPrefix) {
1050   SmallString<64> Path1("/foo");
1051   SmallString<64> Path2("/old/foo");
1052   SmallString<64> OldPrefix("/old");
1053   SmallString<64> NewPrefix("/new");
1054   SmallString<64> NewPrefix2("/longernew");
1055   SmallString<64> EmptyPrefix("");
1056 
1057   SmallString<64> Path = Path1;
1058   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1059   EXPECT_EQ(Path, "/foo");
1060   Path = Path2;
1061   path::replace_path_prefix(Path, OldPrefix, NewPrefix);
1062   EXPECT_EQ(Path, "/new/foo");
1063   Path = Path2;
1064   path::replace_path_prefix(Path, OldPrefix, NewPrefix2);
1065   EXPECT_EQ(Path, "/longernew/foo");
1066   Path = Path1;
1067   path::replace_path_prefix(Path, EmptyPrefix, NewPrefix);
1068   EXPECT_EQ(Path, "/new/foo");
1069   Path = Path2;
1070   path::replace_path_prefix(Path, OldPrefix, EmptyPrefix);
1071   EXPECT_EQ(Path, "/foo");
1072 }
1073 
1074 TEST_F(FileSystemTest, PathFromFD) {
1075   // Create a temp file.
1076   int FileDescriptor;
1077   SmallString<64> TempPath;
1078   ASSERT_NO_ERROR(
1079       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1080   FileRemover Cleanup(TempPath);
1081 
1082   // Make sure it exists.
1083   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1084 
1085   // Try to get the path from the file descriptor
1086   SmallString<64> ResultPath;
1087   std::error_code ErrorCode =
1088       fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1089 
1090   // If we succeeded, check that the paths are the same (modulo case):
1091   if (!ErrorCode) {
1092     // The paths returned by createTemporaryFile and getPathFromOpenFD
1093     // should reference the same file on disk.
1094     fs::UniqueID D1, D2;
1095     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1096     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1097     ASSERT_EQ(D1, D2);
1098   }
1099 
1100   ::close(FileDescriptor);
1101 }
1102 
1103 TEST_F(FileSystemTest, PathFromFDWin32) {
1104   // Create a temp file.
1105   int FileDescriptor;
1106   SmallString<64> TempPath;
1107   ASSERT_NO_ERROR(
1108     fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1109   FileRemover Cleanup(TempPath);
1110 
1111   // Make sure it exists.
1112   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1113 
1114   SmallVector<char, 8> ResultPath;
1115   std::error_code ErrorCode =
1116     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1117 
1118   if (!ErrorCode) {
1119     // Now that we know how much space is required for the path, create a path
1120     // buffer with exactly enough space (sans null terminator, which should not
1121     // be present), and call getPathFromOpenFD again to ensure that the API
1122     // properly handles exactly-sized buffers.
1123     SmallVector<char, 8> ExactSizedPath(ResultPath.size());
1124     ErrorCode = fs::getPathFromOpenFD(FileDescriptor, ExactSizedPath);
1125     ResultPath = ExactSizedPath;
1126   }
1127 
1128   if (!ErrorCode) {
1129     fs::UniqueID D1, D2;
1130     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1131     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1132     ASSERT_EQ(D1, D2);
1133   }
1134   ::close(FileDescriptor);
1135 }
1136 
1137 TEST_F(FileSystemTest, PathFromFDUnicode) {
1138   // Create a temp file.
1139   int FileDescriptor;
1140   SmallString<64> TempPath;
1141 
1142   // Test Unicode: "<temp directory>/(pi)r^2<temp rand chars>.aleth.0"
1143   ASSERT_NO_ERROR(
1144     fs::createTemporaryFile("\xCF\x80r\xC2\xB2",
1145                             "\xE2\x84\xB5.0", FileDescriptor, TempPath));
1146   FileRemover Cleanup(TempPath);
1147 
1148   // Make sure it exists.
1149   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1150 
1151   SmallVector<char, 8> ResultPath;
1152   std::error_code ErrorCode =
1153     fs::getPathFromOpenFD(FileDescriptor, ResultPath);
1154 
1155   if (!ErrorCode) {
1156     fs::UniqueID D1, D2;
1157     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1158     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1159     ASSERT_EQ(D1, D2);
1160   }
1161   ::close(FileDescriptor);
1162 }
1163 
1164 TEST_F(FileSystemTest, OpenFileForRead) {
1165   // Create a temp file.
1166   int FileDescriptor;
1167   SmallString<64> TempPath;
1168   ASSERT_NO_ERROR(
1169       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
1170   FileRemover Cleanup(TempPath);
1171 
1172   // Make sure it exists.
1173   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1174 
1175   // Open the file for read
1176   int FileDescriptor2;
1177   SmallString<64> ResultPath;
1178   ASSERT_NO_ERROR(
1179       fs::openFileForRead(Twine(TempPath), FileDescriptor2, &ResultPath))
1180 
1181   // If we succeeded, check that the paths are the same (modulo case):
1182   if (!ResultPath.empty()) {
1183     // The paths returned by createTemporaryFile and getPathFromOpenFD
1184     // should reference the same file on disk.
1185     fs::UniqueID D1, D2;
1186     ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), D1));
1187     ASSERT_NO_ERROR(fs::getUniqueID(Twine(ResultPath), D2));
1188     ASSERT_EQ(D1, D2);
1189   }
1190 
1191   ::close(FileDescriptor);
1192 }
1193 
1194 #define CHECK_UNSUPPORTED() \
1195   do { \
1196     if (isUnsupportedOSOrEnvironment()) \
1197       return; \
1198   } while (0); \
1199 
1200 TEST_F(FileSystemTest, is_local) {
1201   CHECK_UNSUPPORTED();
1202 
1203   SmallString<128> CurrentPath;
1204   ASSERT_NO_ERROR(fs::current_path(CurrentPath));
1205 
1206   bool Result;
1207   ASSERT_NO_ERROR(fs::is_local(CurrentPath, Result));
1208   EXPECT_TRUE(Result);
1209   EXPECT_TRUE(fs::is_local(CurrentPath));
1210 
1211   int FD;
1212   SmallString<64> TempPath;
1213   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
1214   FileRemover Cleanup(TempPath);
1215 
1216   // Make sure it exists.
1217   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
1218 
1219   ASSERT_NO_ERROR(fs::is_local(FD, Result));
1220   EXPECT_TRUE(Result);
1221   EXPECT_TRUE(fs::is_local(FD));
1222 }
1223 
1224 TEST_F(FileSystemTest, set_current_path) {
1225   SmallString<128> path;
1226 
1227   ASSERT_NO_ERROR(fs::current_path(path));
1228   ASSERT_NE(TestDirectory, path);
1229 
1230   struct RestorePath {
1231     SmallString<128> path;
1232     RestorePath(const SmallString<128> &path) : path(path) {}
1233     ~RestorePath() { fs::set_current_path(path); }
1234   } restore_path(path);
1235 
1236   ASSERT_NO_ERROR(fs::set_current_path(TestDirectory));
1237 
1238   ASSERT_NO_ERROR(fs::current_path(path));
1239 
1240   fs::UniqueID D1, D2;
1241   ASSERT_NO_ERROR(fs::getUniqueID(TestDirectory, D1));
1242   ASSERT_NO_ERROR(fs::getUniqueID(path, D2));
1243   ASSERT_EQ(D1, D2) << "D1: " << TestDirectory << "\nD2: " << path;
1244 }
1245 
1246 } // anonymous namespace
1247