Add the statx function

sysdeps/unix/sysv/linux/statx.c

@@ -0,0 +1,41 @@
+/* Linux statx implementation.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sys/stat.h>
+
+#include "statx_generic.c"
+
+int
+statx (int fd, const char *path, int flags,
+       unsigned int mask, struct statx *buf)
+{
+#ifdef __NR_statx
+  int ret = INLINE_SYSCALL_CALL (statx, fd, path, flags, mask, buf);
+# ifdef __ASSUME_STATX
+  return ret;
+# else
+  if (ret == 0 || errno != ENOSYS)
+    /* Preserve non-error/non-ENOSYS return values.  */
+    return ret;
+# endif
+#endif
+#ifndef __ASSUME_STATX
+  return statx_generic (fd, path, flags, mask, buf);
+#endif
+}