qt-bugs@ issue : none

Trolltech task ID : none yet

bugs.kde.org number : None

applied: no

author: Dirk Mueller <mueller@kde.org>

in big user environments, getgrgid_r() needs more memory than sysconf() returns.

Try a bit harder.

--- src/corelib/io/qfsfileengine_unix.cpp

+++ src/corelib/io/qfsfileengine_unix.cpp

@@ -831,9 +831,16 @@ QString QFSFileEngine::owner(FileOwner o

     } else if (own == OwnerGroup) {

         struct group *gr = 0;

 #if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && !defined(Q_OS_OPENBSD)

-        buf.resize(sysconf(_SC_GETGR_R_SIZE_MAX));

-        struct group entry;

-        getgrgid_r(ownerId(own), &entry, buf.data(), buf.size(), &gr);

+        for (unsigned size = sysconf(_SC_GETGR_R_SIZE_MAX); size < 256000; size += size)

+        {

+            buf.resize(size);

+            struct group entry;

+            // ERANGE indicates that the buffer was too small

+            if (!getgrgid_r(ownerId(own), &entry, buf.data(), buf.size(), &gr)

+                || errno != ERANGE)

+                break;

+        }

+

 #else

         gr = getgrgid(ownerId(own));

 #endif