linux: Use internal DIR locks when accessing filepos on telldir

Since it might change during a readdir call.

Checked on x86_64-linux-gnu and i686-linux-gnu.

diff --git a/sysdeps/posix/telldir.c b/sysdeps/posix/telldir.c
index 1bb822c8075be731754c803f61bda1cccdfb028c..57d435ed21d2d1ab2c4e7ef41da162d25971cc52 100644 (file)
--- a/sysdeps/posix/telldir.c
+++ b/sysdeps/posix/telldir.c
@@ -23,5 +23,11 @@
 long int
 telldir (DIR *dirp)
 {
-  return dirp->filepos;
+  long int ret;
+
+  __libc_lock_lock (dirp->lock);
+  ret = dirp->filepos;
+  __libc_lock_unlock (dirp->lock);
+
+  return ret;
 }