Merge pull request #188 from bbannier/topic/bbannier/getcwd-with-NULL-buf

Avoid GNU `getcwd` extension behavior

.cirrus.yml

@@ -11,25 +11,24 @@ freebsd_task:
   test_script: |
     sudo -u testuser .ci/unix-test.sh
 
-centos7_task:
+rockylinux8_task:
   container:
-    image: centos:7
+    image: docker.io/rockylinux:8
   install_script: |
-    yum install -y centos-release-scl
-    yum install -y devtoolset-9
-    curl -L https://github.com/Kitware/CMake/releases/download/v3.16.4/cmake-3.16.4-Linux-x86_64.tar.gz | tar xzvf - -C /usr/local --strip-components 1
+    dnf group install -y "Development Tools"
+    dnf install cmake -y
   build_script: |
-    source /opt/rh/devtoolset-9/enable && PATH=$PATH:/usr/local/bin .ci/unix-build.sh
+    .ci/unix-build.sh
   test_script: |
-    PATH=$PATH:/usr/local/bin .ci/unix-test.sh
+    .ci/unix-test.sh
 
-centos8_task:
+rockylinux9_task:
   container:
-    image: quay.io/centos/centos:stream8
+    image: docker.io/rockylinux:9
   install_script: |
-    yum group install -y "Development Tools"
-    curl -L https://github.com/Kitware/CMake/releases/download/v3.16.4/cmake-3.16.4-Linux-x86_64.tar.gz | tar xzvf - -C /usr/local --strip-components 1
+    dnf group install -y "Development Tools"
+    dnf install cmake -y
   build_script: |
-    PATH=$PATH:/usr/local/bin .ci/unix-build.sh
+    .ci/unix-build.sh
   test_script: |
-    PATH=$PATH:/usr/local/bin .ci/unix-test.sh
+    .ci/unix-test.sh

include/ghc/filesystem.hpp

@@ -4229,7 +4229,7 @@ GHC_INLINE path current_path(std::error_code& ec)
     }
     return path(std::wstring(buffer.get()), path::native_format);
 #elif defined(__GLIBC__)
-    std::unique_ptr<char, decltype(&std::free)> buffer { ::getcwd(NULL, 0), std::free };
+    std::unique_ptr<char, decltype(&std::free)> buffer { ::get_current_dir_name(), std::free };
     if (buffer == nullptr) {
         ec = detail::make_system_error();
         return path();