CMake: enable setting default dir creation permissions

Introduces CMAKE_DEFAULT_DIRECTORY_INSTALL_PERMISSIONS
variable which enables the user to specify the default
permissions for directory creation. This setting is then
used to auto set the permissions on directories which
are implicitly created by install() and file(INSTALL)
commands such as CMAKE_INSTALL_PREFIX directories.

1 files changed, 22 insertions, 1 deletions

diff --git a/Source/cmFileCommand.cxx b/Source/cmFileCommand.cxx
index 191a666fe9..a9824d7f1b 100644
--- a/Source/cmFileCommand.cxx
+++ b/Source/cmFileCommand.cxx
@@ -2015,9 +2015,30 @@ bool cmFileInstaller::HandleInstallDestination()
     this->DestDirLength = int(sdestdir.size());
   }
 
+  // check if default dir creation permissions were set
+  mode_t default_dir_mode_v = 0;
+  mode_t* default_dir_mode = nullptr;
+  const char* default_dir_install_permissions = this->Makefile->GetDefinition(
+    "CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS");
+  if (default_dir_install_permissions && *default_dir_install_permissions) {
+    std::vector<std::string> items;
+    cmSystemTools::ExpandListArgument(default_dir_install_permissions, items);
+    for (const auto& arg : items) {
+      if (!this->CheckPermissions(arg, default_dir_mode_v)) {
+        std::ostringstream e;
+        e << this->FileCommand->GetError()
+          << " Set with CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS variable.";
+        this->FileCommand->SetError(e.str());
+        return false;
+      }
+    }
+
+    default_dir_mode = &default_dir_mode_v;
+  }
+
   if (this->InstallType != cmInstallType_DIRECTORY) {
     if (!cmSystemTools::FileExists(destination.c_str())) {
-      if (!cmSystemTools::MakeDirectory(destination.c_str())) {
+      if (!cmSystemTools::MakeDirectory(destination, default_dir_mode)) {
         std::string errstring = "cannot create directory: " + destination +
           ". Maybe need administrative privileges.";
         this->FileCommand->SetError(errstring);