git: 805f6029286e - stable/13 - kyua: Stop using readdir_r()

The branch stable/13 has been updated by des:

URL: https://cgit.FreeBSD.org/src/commit/?id=805f6029286e2045326877e8d06ae1adc2e41862

commit 805f6029286e2045326877e8d06ae1adc2e41862
Author:     Dag-Erling Smørgrav <des@FreeBSD.org>
AuthorDate: 2025-08-01 23:11:26 +0000
Commit:     Dag-Erling Smørgrav <des@FreeBSD.org>
CommitDate: 2025-08-08 19:46:33 +0000

    kyua: Stop using readdir_r()
    
    It cannot be used safely, and Kyua doesn't even pretend to try.
    
    MFC after:      1 week
    Sponsored by:   Klara, Inc.
    Reviewed by:    igoro
    Differential Revision:  https://reviews.freebsd.org/D51680
    
    (cherry picked from commit 65bae451c23b8d61b2433259d8e707250660eeff)
---
 contrib/kyua/utils/fs/directory.cpp | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/contrib/kyua/utils/fs/directory.cpp b/contrib/kyua/utils/fs/directory.cpp
index ff7ad5e34357..9103c2377c34 100644
--- a/contrib/kyua/utils/fs/directory.cpp
+++ b/contrib/kyua/utils/fs/directory.cpp
@@ -127,16 +127,9 @@ struct utils::fs::detail::directory_iterator::impl : utils::noncopyable {
     /// not.  A null pointer means an invalid iterator.
     ::DIR* _dirp;
 
-    /// Raw representation of the system directory entry.
-    ///
-    /// We need to keep this at the class level so that we can use the
-    /// readdir_r(3) function.
-    ::dirent _dirent;
-
     /// Custom representation of the directory entry.
     ///
-    /// This is separate from _dirent because this is the type we return to the
-    /// user.  We must keep this as a pointer so that we can support the common
+    /// We must keep this as a pointer so that we can support the common
     /// operators (* and ->) over iterators.
     std::auto_ptr< directory_entry > _entry;
 
@@ -192,22 +185,23 @@ struct utils::fs::detail::directory_iterator::impl : utils::noncopyable {
     /// It is possible to use this function on a new directory_entry object to
     /// initialize the first entry.
     ///
-    /// \throw system_error If the call to readdir_r fails.
+    /// \throw system_error If the call to readdir fails.
     void
     next(void)
     {
         ::dirent* result;
 
-        if (::readdir_r(_dirp, &_dirent, &result) == -1) {
+        errno = 0;
+        if ((result = ::readdir(_dirp)) == NULL && errno != 0) {
             const int original_errno = errno;
-            throw fs::system_error(F("readdir_r(%s) failed") % _path,
+            throw fs::system_error(F("readdir(%s) failed") % _path,
                                    original_errno);
         }
         if (result == NULL) {
             _entry.reset(NULL);
             close();
         } else {
-            _entry.reset(new directory_entry(_dirent.d_name));
+            _entry.reset(new directory_entry(result->d_name));
         }
     }
 };