QNX: Remember information on whether a file is a link

This avoids an additional call to lstat() When using QDir::entryList()
with the QDir::NoSymLinks flag.

This is a backport of
qtbase commit 03cd922e312428aca54892039da9ed79479cfa17

Change-Id: I5ef10c369ce6790c8d0de1346436f9ea7aaa4194
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Kevin Krammer <kevin.krammer@kdab.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/corelib/io/qfilesystemengine.cpp b/src/corelib/io/qfilesystemengine.cpp
index 2102837..02b7aba 100644
--- a/src/corelib/io/qfilesystemengine.cpp
+++ b/src/corelib/io/qfilesystemengine.cpp
@@ -312,6 +312,13 @@ void QFileSystemMetaData::fillFromDirEnt(const QT_DIRENT &entry)
             const struct dirent_extra_stat * const extra_stat =
                     reinterpret_cast<struct dirent_extra_stat *>(extra);
 
+            // Remember whether this was a link or not, this saves an lstat() call later.
+            if (extra->d_type == _DTYPE_LSTAT) {
+                knownFlagsMask |= QFileSystemMetaData::LinkType;
+                if (S_ISLNK(extra_stat->d_stat.st_mode))
+                    entryFlags |= QFileSystemMetaData::LinkType;
+            }
+
             // For symlinks, the extra type _DTYPE_LSTAT doesn't work for filling out the meta data,
             // as we need the stat() information there, not the lstat() information.
             // In this case, don't use the extra information.