Merge topic 'cmWorkingDirectory_success_checking'

5901699672 cmDepends: Remove attempt to change directory that always fails
e60e4dfc88 cmWorkingDirectory: Check success of current dir changes
e654622aee Tests: Add --build-and-test test case
a865f0beb2 Tests: Confirm test working dir set successfully

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1817

17 files changed, 226 insertions, 31 deletions

diff --git a/Source/CPack/cmCPackArchiveGenerator.cxx b/Source/CPack/cmCPackArchiveGenerator.cxx
index 9ff547a..00fbdab 100644
--- a/Source/CPack/cmCPackArchiveGenerator.cxx
+++ b/Source/CPack/cmCPackArchiveGenerator.cxx
@@ -9,6 +9,7 @@
 #include "cmSystemTools.h"
 #include "cmWorkingDirectory.h"
 
+#include <cstring>
 #include <ostream>
 #include <utility>
 #include <vector>
@@ -51,6 +52,7 @@ int cmCPackArchiveGenerator::InitializeInternal()
   this->SetOptionIfNotSet("CPACK_INCLUDE_TOPLEVEL_DIRECTORY", "1");
   return this->Superclass::InitializeInternal();
 }
+
 int cmCPackArchiveGenerator::addOneComponentToArchive(
   cmArchiveWrite& archive, cmCPackComponent* component)
 {
@@ -61,6 +63,13 @@ int cmCPackArchiveGenerator::addOneComponentToArchive(
   localToplevel += "/" + component->Name;
   // Change to local toplevel
   cmWorkingDirectory workdir(localToplevel);
+  if (workdir.Failed()) {
+    cmCPackLogger(cmCPackLog::LOG_ERROR,
+                  "Failed to change working directory to "
+                    << localToplevel << " : "
+                    << std::strerror(workdir.GetLastResult()) << std::endl);
+    return 0;
+  }
   std::string filePrefix;
   if (this->IsOn("CPACK_COMPONENT_INCLUDE_TOPLEVEL_DIRECTORY")) {
     filePrefix = this->GetOption("CPACK_PACKAGE_FILE_NAME");
@@ -237,6 +246,13 @@ int cmCPackArchiveGenerator::PackageFiles()
   // CASE 3 : NON COMPONENT package.
   DECLARE_AND_OPEN_ARCHIVE(packageFileNames[0], archive);
   cmWorkingDirectory workdir(toplevel);
+  if (workdir.Failed()) {
+    cmCPackLogger(cmCPackLog::LOG_ERROR,
+                  "Failed to change working directory to "
+                    << toplevel << " : "
+                    << std::strerror(workdir.GetLastResult()) << std::endl);
+    return 0;
+  }
   for (std::string const& file : files) {
     // Get the relative path to the file
     std::string rp = cmSystemTools::RelativePath(toplevel, file);
diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index d838b30..d41a9e5 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -6,6 +6,7 @@
 #include "cmsys/Glob.hxx"
 #include "cmsys/RegularExpression.hxx"
 #include <algorithm>
+#include <cstring>
 #include <memory> // IWYU pragma: keep
 #include <utility>
 
@@ -404,6 +405,13 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
         cmCPackLogger(cmCPackLog::LOG_DEBUG, "Change dir to: " << goToDir
                                                                << std::endl);
         cmWorkingDirectory workdir(goToDir);
+        if (workdir.Failed()) {
+          cmCPackLogger(
+            cmCPackLog::LOG_ERROR, "Failed to change working directory to "
+              << goToDir << " : " << std::strerror(workdir.GetLastResult())
+              << std::endl);
+          return 0;
+        }
         for (auto const& symlinked : symlinkedFiles) {
           cmCPackLogger(cmCPackLog::LOG_DEBUG, "Will create a symlink: "
                           << symlinked.second << "--> " << symlinked.first
diff --git a/Source/CTest/cmCTestBuildAndTestHandler.cxx b/Source/CTest/cmCTestBuildAndTestHandler.cxx
index 2e1ea4c..b2c68e7 100644
--- a/Source/CTest/cmCTestBuildAndTestHandler.cxx
+++ b/Source/CTest/cmCTestBuildAndTestHandler.cxx
@@ -11,6 +11,7 @@
 
 #include "cmsys/Process.h"
 #include <chrono>
+#include <cstring>
 #include <ratio>
 #include <stdlib.h>
 
@@ -196,6 +197,16 @@ int cmCTestBuildAndTestHandler::RunCMakeAndTest(std::string* outstring)
     cmSystemTools::MakeDirectory(this->BinaryDir);
   }
   cmWorkingDirectory workdir(this->BinaryDir);
+  if (workdir.Failed()) {
+    auto msg = "Failed to change working directory to " + this->BinaryDir +
+      " : " + std::strerror(workdir.GetLastResult()) + "\n";
+    if (outstring) {
+      *outstring = msg;
+    } else {
+      cmCTestLog(this->CTest, ERROR_MESSAGE, msg);
+    }
+    return 1;
+  }
 
   if (this->BuildNoCMake) {
     // Make the generator available for the Build call below.
@@ -307,7 +318,16 @@ int cmCTestBuildAndTestHandler::RunCMakeAndTest(std::string* outstring)
   // run the test from the this->BuildRunDir if set
   if (!this->BuildRunDir.empty()) {
     out << "Run test in directory: " << this->BuildRunDir << "\n";
-    cmSystemTools::ChangeDirectory(this->BuildRunDir);
+    if (!workdir.SetDirectory(this->BuildRunDir)) {
+      out << "Failed to change working directory : "
+          << std::strerror(workdir.GetLastResult()) << "\n";
+      if (outstring) {
+        *outstring = out.str();
+      } else {
+        cmCTestLog(this->CTest, ERROR_MESSAGE, out.str());
+      }
+      return 1;
+    }
   }
   out << "Running test command: \"" << fullPath << "\"";
   for (std::string const& testCommandArg : this->TestCommandArgs) {
diff --git a/Source/CTest/cmCTestCoverageHandler.cxx b/Source/CTest/cmCTestCoverageHandler.cxx
index 9c66e73..6cf0ac2 100644
--- a/Source/CTest/cmCTestCoverageHandler.cxx
+++ b/Source/CTest/cmCTestCoverageHandler.cxx
@@ -23,6 +23,7 @@
 #include "cmsys/RegularExpression.hxx"
 #include <algorithm>
 #include <chrono>
+#include <cstring>
 #include <iomanip>
 #include <iterator>
 #include <sstream>
@@ -975,7 +976,12 @@ int cmCTestCoverageHandler::HandleGCovCoverage(
 
   std::string testingDir = this->CTest->GetBinaryDir() + "/Testing";
   std::string tempDir = testingDir + "/CoverageInfo";
-  cmSystemTools::MakeDirectory(tempDir);
+  if (!cmSystemTools::MakeDirectory(tempDir)) {
+    cmCTestLog(this->CTest, ERROR_MESSAGE,
+               "Unable to make directory: " << tempDir << std::endl);
+    cont->Error++;
+    return 0;
+  }
   cmWorkingDirectory workdir(tempDir);
 
   int gcovStyle = 0;
@@ -1376,6 +1382,14 @@ int cmCTestCoverageHandler::HandleLCovCoverage(
                        this->Quiet);
     std::string fileDir = cmSystemTools::GetFilenamePath(f);
     cmWorkingDirectory workdir(fileDir);
+    if (workdir.Failed()) {
+      cmCTestLog(this->CTest, ERROR_MESSAGE,
+                 "Unable to change working directory to "
+                   << fileDir << " : "
+                   << std::strerror(workdir.GetLastResult()) << std::endl);
+      cont->Error++;
+      continue;
+    }
 
     cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                        "Current coverage dir: " << fileDir << std::endl,
@@ -1600,6 +1614,12 @@ bool cmCTestCoverageHandler::FindLCovFiles(std::vector<std::string>& files)
   gl.RecurseThroughSymlinksOff();
   std::string buildDir = this->CTest->GetCTestConfiguration("BuildDirectory");
   cmWorkingDirectory workdir(buildDir);
+  if (workdir.Failed()) {
+    cmCTestLog(this->CTest, ERROR_MESSAGE,
+               "Unable to change working directory to " << buildDir
+                                                        << std::endl);
+    return false;
+  }
 
   // Run profmerge to merge all *.dyn files into dpi files
   if (!cmSystemTools::RunSingleCommand("profmerge")) {
diff --git a/Source/CTest/cmCTestHandlerCommand.cxx b/Source/CTest/cmCTestHandlerCommand.cxx
index 5a7baf5..1fff2fa 100644
--- a/Source/CTest/cmCTestHandlerCommand.cxx
+++ b/Source/CTest/cmCTestHandlerCommand.cxx
@@ -9,6 +9,7 @@
 #include "cmWorkingDirectory.h"
 #include "cmake.h"
 
+#include <cstring>
 #include <sstream>
 #include <stdlib.h>
 
@@ -218,6 +219,21 @@ bool cmCTestHandlerCommand::InitialPass(std::vector<std::string> const& args,
   }
   cmWorkingDirectory workdir(
     this->CTest->GetCTestConfiguration("BuildDirectory"));
+  if (workdir.Failed()) {
+    this->SetError("failed to change directory to " +
+                   this->CTest->GetCTestConfiguration("BuildDirectory") +
+                   " : " + std::strerror(workdir.GetLastResult()));
+    if (capureCMakeError) {
+      this->Makefile->AddDefinition(this->Values[ct_CAPTURE_CMAKE_ERROR],
+                                    "-1");
+      cmCTestLog(this->CTest, ERROR_MESSAGE, this->GetName()
+                   << " " << this->GetError() << "\n");
+      // return success because failure is recorded in CAPTURE_CMAKE_ERROR
+      return true;
+    }
+    return false;
+  }
+
   int res = handler->ProcessHandler();
   if (this->Values[ct_RETURN_VALUE] && *this->Values[ct_RETURN_VALUE]) {
     std::ostringstream str;
diff --git a/Source/CTest/cmCTestMultiProcessHandler.cxx b/Source/CTest/cmCTestMultiProcessHandler.cxx
index 99cf551..14b5caa 100644
--- a/Source/CTest/cmCTestMultiProcessHandler.cxx
+++ b/Source/CTest/cmCTestMultiProcessHandler.cxx
@@ -20,6 +20,7 @@
 
 #include <algorithm>
 #include <chrono>
+#include <cstring>
 #include <iomanip>
 #include <list>
 #include <math.h>
@@ -169,13 +170,19 @@ bool cmCTestMultiProcessHandler::StartTestProcess(int test)
     }
   }
 
-  cmWorkingDirectory workdir(this->Properties[test]->Directory);
-
-  // Lock the resources we'll be using
+  // Always lock the resources we'll be using, even if we fail to set the
+  // working directory because FinishTestProcess() will try to unlock them
   this->LockResources(test);
 
-  if (testRun->StartTest(this->Total)) {
-    return true;
+  cmWorkingDirectory workdir(this->Properties[test]->Directory);
+  if (workdir.Failed()) {
+    testRun->StartFailure("Failed to change working directory to " +
+                          this->Properties[test]->Directory + " : " +
+                          std::strerror(workdir.GetLastResult()));
+  } else {
+    if (testRun->StartTest(this->Total)) {
+      return true;
+    }
   }
 
   this->FinishTestProcess(testRun, false);
@@ -694,6 +701,8 @@ void cmCTestMultiProcessHandler::PrintTestList()
     count++;
     cmCTestTestHandler::cmCTestTestProperties& p = *it.second;
 
+    // Don't worry if this fails, we are only showing the test list, not
+    // running the tests
     cmWorkingDirectory workdir(p.Directory);
 
     cmCTestRunTest testRun(*this);
diff --git a/Source/CTest/cmCTestRunTest.cxx b/Source/CTest/cmCTestRunTest.cxx
index 1ae36f7..8d8ebaa 100644
--- a/Source/CTest/cmCTestRunTest.cxx
+++ b/Source/CTest/cmCTestRunTest.cxx
@@ -14,6 +14,7 @@
 #include "cmsys/RegularExpression.hxx"
 #include <chrono>
 #include <cmAlgorithms.h>
+#include <cstring>
 #include <iomanip>
 #include <ratio>
 #include <sstream>
@@ -248,11 +249,7 @@ bool cmCTestRunTest::EndTest(size_t completed, size_t total, bool started)
     *this->TestHandler->LogFile << "Test time = " << buf << std::endl;
   }
 
-  // Set the working directory to the tests directory to process Dart files.
-  {
-    cmWorkingDirectory workdir(this->TestProperties->Directory);
-    this->DartProcessing();
-  }
+  this->DartProcessing();
 
   // if this is doing MemCheck then all the output needs to be put into
   // Output since that is what is parsed by cmCTestMemCheckHandler
@@ -338,6 +335,13 @@ bool cmCTestRunTest::StartAgain()
   this->RunAgain = false; // reset
   // change to tests directory
   cmWorkingDirectory workdir(this->TestProperties->Directory);
+  if (workdir.Failed()) {
+    this->StartFailure("Failed to change working directory to " +
+                       this->TestProperties->Directory + " : " +
+                       std::strerror(workdir.GetLastResult()));
+    return true;
+  }
+
   this->StartTest(this->TotalNumberOfTests);
   return true;
 }
@@ -386,6 +390,37 @@ void cmCTestRunTest::MemCheckPostProcess()
   handler->PostProcessTest(this->TestResult, this->Index);
 }
 
+void cmCTestRunTest::StartFailure(std::string const& output)
+{
+  // Still need to log the Start message so the test summary records our
+  // attempt to start this test
+  cmCTestLog(this->CTest, HANDLER_OUTPUT,
+             std::setw(2 * getNumWidth(this->TotalNumberOfTests) + 8)
+               << "Start "
+               << std::setw(getNumWidth(this->TestHandler->GetMaxIndex()))
+               << this->TestProperties->Index << ": "
+               << this->TestProperties->Name << std::endl);
+
+  this->ProcessOutput.clear();
+  if (!output.empty()) {
+    *this->TestHandler->LogFile << output << std::endl;
+    cmCTestLog(this->CTest, ERROR_MESSAGE, output << std::endl);
+  }
+
+  this->TestResult.Properties = this->TestProperties;
+  this->TestResult.ExecutionTime = cmDuration::zero();
+  this->TestResult.CompressOutput = false;
+  this->TestResult.ReturnValue = -1;
+  this->TestResult.CompletionStatus = "Failed to start";
+  this->TestResult.Status = cmCTestTestHandler::NOT_RUN;
+  this->TestResult.TestCount = this->TestProperties->Index;
+  this->TestResult.Name = this->TestProperties->Name;
+  this->TestResult.Path = this->TestProperties->Directory;
+  this->TestResult.Output = output;
+  this->TestResult.FullCommandLine.clear();
+  this->TestProcess = cm::make_unique<cmProcess>(*this);
+}
+
 // Starts the execution of a test.  Returns once it has started
 bool cmCTestRunTest::StartTest(size_t total)
 {
diff --git a/Source/CTest/cmCTestRunTest.h b/Source/CTest/cmCTestRunTest.h
index 073af11..3b1d674 100644
--- a/Source/CTest/cmCTestRunTest.h
+++ b/Source/CTest/cmCTestRunTest.h
@@ -74,6 +74,8 @@ public:
 
   bool StartAgain();
 
+  void StartFailure(std::string const& output);
+
   cmCTest* GetCTest() const { return this->CTest; }
 
   void FinalizeTest();
diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index 08d05c8..3bab81e 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -7,6 +7,7 @@
 #include "cm_jsoncpp_value.h"
 #include "cmsys/Process.h"
 #include <chrono>
+#include <cstring>
 #include <sstream>
 #include <stdio.h>
 #include <stdlib.h>
@@ -1532,6 +1533,15 @@ int cmCTestSubmitHandler::ProcessHandler()
     // change to the build directory so that we can uses a relative path
     // on windows since scp doesn't support "c:" a drive in the path
     cmWorkingDirectory workdir(buildDirectory);
+    if (workdir.Failed()) {
+      cmCTestLog(this->CTest, ERROR_MESSAGE,
+                 "   Failed to change directory to "
+                   << buildDirectory << " : "
+                   << std::strerror(workdir.GetLastResult()) << std::endl);
+      ofs << "   Failed to change directory to " << buildDirectory << " : "
+          << std::strerror(workdir.GetLastResult()) << std::endl;
+      return -1;
+    }
 
     if (!this->SubmitUsingSCP(this->CTest->GetCTestConfiguration("ScpCommand"),
                               "Testing/" + this->CTest->GetCurrentTag(), files,
@@ -1551,6 +1561,15 @@ int cmCTestSubmitHandler::ProcessHandler()
     // change to the build directory so that we can uses a relative path
     // on windows since scp doesn't support "c:" a drive in the path
     cmWorkingDirectory workdir(buildDirectory);
+    if (workdir.Failed()) {
+      cmCTestLog(this->CTest, ERROR_MESSAGE,
+                 "   Failed to change directory to "
+                   << buildDirectory << " : "
+                   << std::strerror(workdir.GetLastResult()) << std::endl);
+      ofs << "   Failed to change directory to " << buildDirectory << " : "
+          << std::strerror(workdir.GetLastResult()) << std::endl;
+      return -1;
+    }
     cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                        "   Change directory: " << buildDirectory << std::endl,
                        this->Quiet);
diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index d1affd4..cbaf984 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -6,6 +6,7 @@
 #include <cmsys/Base64.h>
 #include <cmsys/Directory.hxx>
 #include <cmsys/RegularExpression.hxx>
+#include <cstring>
 #include <functional>
 #include <iomanip>
 #include <iterator>
@@ -14,7 +15,6 @@
 #include <sstream>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <time.h>
 
 #include "cmAlgorithms.h"
@@ -85,6 +85,11 @@ bool cmCTestSubdirCommand::InitialPass(std::vector<std::string> const& args,
     bool readit = false;
     {
       cmWorkingDirectory workdir(fname);
+      if (workdir.Failed()) {
+        this->SetError("Failed to change directory to " + fname + " : " +
+                       std::strerror(workdir.GetLastResult()));
+        return false;
+      }
       const char* testFilename;
       if (cmSystemTools::FileExists("CTestTestfile.cmake")) {
         // does the CTestTestfile.cmake exist ?
diff --git a/Source/cmDepends.cxx b/Source/cmDepends.cxx
index cdab671..4716e14 100644
--- a/Source/cmDepends.cxx
+++ b/Source/cmDepends.cxx
@@ -7,7 +7,6 @@
 #include "cmLocalGenerator.h"
 #include "cmMakefile.h"
 #include "cmSystemTools.h"
-#include "cmWorkingDirectory.h"
 
 #include "cmsys/FStream.hxx"
 #include <sstream>
@@ -15,8 +14,7 @@
 #include <utility>
 
 cmDepends::cmDepends(cmLocalGenerator* lg, const char* targetDir)
-  : CompileDirectory()
-  , LocalGenerator(lg)
+  : LocalGenerator(lg)
   , Verbose(false)
   , FileComparison(nullptr)
   , TargetDirectory(targetDir)
@@ -73,9 +71,6 @@ bool cmDepends::Finalize(std::ostream& /*unused*/, std::ostream& /*unused*/)
 bool cmDepends::Check(const char* makeFile, const char* internalFile,
                       std::map<std::string, DependencyVector>& validDeps)
 {
-  // Dependency checks must be done in proper working directory.
-  cmWorkingDirectory workdir(this->CompileDirectory);
-
   // Check whether dependencies must be regenerated.
   bool okay = true;
   cmsys::ifstream fin(internalFile);
diff --git a/Source/cmDepends.h b/Source/cmDepends.h
index a4fee3c..4b9e05a 100644
--- a/Source/cmDepends.h
+++ b/Source/cmDepends.h
@@ -31,9 +31,6 @@ public:
       path from the build directory to the target file.  */
   cmDepends(cmLocalGenerator* lg = nullptr, const char* targetDir = "");
 
-  /** at what level will the compile be done from */
-  void SetCompileDirectory(const char* dir) { this->CompileDirectory = dir; }
-
   /** Set the local generator for the directory in which we are
       scanning dependencies.  This is not a full local generator; it
       has been setup to do relative path conversions for the current
@@ -95,9 +92,6 @@ protected:
   virtual bool Finalize(std::ostream& makeDepends,
                         std::ostream& internalDepends);
 
-  // The directory in which the build rule for the target file is executed.
-  std::string CompileDirectory;
-
   // The local generator.
   cmLocalGenerator* LocalGenerator;
 
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index c805b98..f9eb90f 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -6,11 +6,11 @@
 #include "cmsys/FStream.hxx"
 #include <algorithm>
 #include <assert.h>
+#include <cstring>
 #include <iterator>
 #include <sstream>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
 #include <windows.h>
@@ -1806,6 +1806,8 @@ int cmGlobalGenerator::Build(const std::string& /*unused*/,
                              cmSystemTools::OutputOption outputflag,
                              std::vector<std::string> const& nativeOptions)
 {
+  bool hideconsole = cmSystemTools::GetRunCommandHideConsole();
+
   /**
    * Run an executable command and put the stdout in output.
    */
@@ -1813,9 +1815,17 @@ int cmGlobalGenerator::Build(const std::string& /*unused*/,
   output += "Change Dir: ";
   output += bindir;
   output += "\n";
+  if (workdir.Failed()) {
+    cmSystemTools::SetRunCommandHideConsole(hideconsole);
+    cmSystemTools::Error("Failed to change directory: ",
+                         std::strerror(workdir.GetLastResult()));
+    output += "Failed to change directory: ";
+    output += std::strerror(workdir.GetLastResult());
+    output += "\n";
+    return 1;
+  }
 
   int retVal;
-  bool hideconsole = cmSystemTools::GetRunCommandHideConsole();
   cmSystemTools::SetRunCommandHideConsole(true);
   std::string outputBuffer;
   std::string* outputPtr = &outputBuffer;
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index a69f75f..9e53579 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -6,12 +6,12 @@
 #include "cmsys/RegularExpression.hxx"
 #include <algorithm>
 #include <assert.h>
+#include <cstring>
 #include <ctype.h>
 #include <iterator>
 #include <memory> // IWYU pragma: keep
 #include <sstream>
 #include <stdlib.h>
-#include <string.h>
 #include <utility>
 
 #include "cmAlgorithms.h"
@@ -3250,6 +3250,14 @@ int cmMakefile::TryCompile(const std::string& srcdir,
   // change to the tests directory and run cmake
   // use the cmake object instead of calling cmake
   cmWorkingDirectory workdir(bindir);
+  if (workdir.Failed()) {
+    this->IssueMessage(cmake::FATAL_ERROR,
+                       "Failed to set working directory to " + bindir + " : " +
+                         std::strerror(workdir.GetLastResult()));
+    cmSystemTools::SetFatalErrorOccured();
+    this->IsSourceFileTryCompile = false;
+    return 1;
+  }
 
   // make sure the same generator is used
   // use this program as the cmake to be run, it should not
diff --git a/Source/cmWorkingDirectory.cxx b/Source/cmWorkingDirectory.cxx
index 99c9ba8..816f104 100644
--- a/Source/cmWorkingDirectory.cxx
+++ b/Source/cmWorkingDirectory.cxx
@@ -4,10 +4,12 @@
 
 #include "cmSystemTools.h"
 
+#include <cerrno>
+
 cmWorkingDirectory::cmWorkingDirectory(std::string const& newdir)
 {
   this->OldDir = cmSystemTools::GetCurrentWorkingDirectory();
-  cmSystemTools::ChangeDirectory(newdir);
+  this->SetDirectory(newdir);
 }
 
 cmWorkingDirectory::~cmWorkingDirectory()
@@ -15,10 +17,20 @@ cmWorkingDirectory::~cmWorkingDirectory()
   this->Pop();
 }
 
+bool cmWorkingDirectory::SetDirectory(std::string const& newdir)
+{
+  if (cmSystemTools::ChangeDirectory(newdir) == 0) {
+    this->ResultCode = 0;
+    return true;
+  }
+  this->ResultCode = errno;
+  return false;
+}
+
 void cmWorkingDirectory::Pop()
 {
   if (!this->OldDir.empty()) {
-    cmSystemTools::ChangeDirectory(this->OldDir);
+    this->SetDirectory(this->OldDir);
     this->OldDir.clear();
   }
 }
diff --git a/Source/cmWorkingDirectory.h b/Source/cmWorkingDirectory.h
index aff9267..1f18ce7 100644
--- a/Source/cmWorkingDirectory.h
+++ b/Source/cmWorkingDirectory.h
@@ -9,6 +9,12 @@
 
 /** \class cmWorkingDirectory
  * \brief An RAII class to manipulate the working directory.
+ *
+ * The current working directory is set to the location given to the
+ * constructor. The working directory can be changed again as needed
+ * by calling SetDirectory(). When the object is destroyed, the destructor
+ * will restore the working directory to what it was when the object was
+ * created, regardless of any calls to SetDirectory() in the meantime.
  */
 class cmWorkingDirectory
 {
@@ -16,10 +22,21 @@ public:
   cmWorkingDirectory(std::string const& newdir);
   ~cmWorkingDirectory();
 
+  bool SetDirectory(std::string const& newdir);
   void Pop();
+  bool Failed() const { return ResultCode != 0; }
+
+  /** \return 0 if the last attempt to set the working directory was
+   *          successful. If it failed, the value returned will be the
+   *          \c errno value associated with the failure. A description
+   *          of the error code can be obtained by passing the result
+   *          to \c std::strerror().
+   */
+  int GetLastResult() const { return ResultCode; }
 
 private:
   std::string OldDir;
+  int ResultCode;
 };
 
 #endif
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index f4f4a15..323bcf6 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -98,13 +98,13 @@
 #include "cmsys/Glob.hxx"
 #include "cmsys/RegularExpression.hxx"
 #include <algorithm>
+#include <cstring>
 #include <iostream>
 #include <iterator>
 #include <memory> // IWYU pragma: keep
 #include <sstream>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <utility>
 
 namespace {
@@ -2209,6 +2209,15 @@ int cmake::GetSystemInformation(std::vector<std::string>& args)
   {
     // now run cmake on the CMakeLists file
     cmWorkingDirectory workdir(destPath);
+    if (workdir.Failed()) {
+      // We created the directory and we were able to copy the CMakeLists.txt
+      // file to it, so we wouldn't expect to get here unless the default
+      // permissions are questionable or some other process has deleted the
+      // directory
+      std::cerr << "Failed to change to directory " << destPath << " : "
+                << std::strerror(workdir.GetLastResult()) << std::endl;
+      return 1;
+    }
     std::vector<std::string> args2;
     args2.push_back(args[0]);
     args2.push_back(destPath);