Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 50 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/posix/dl-fileid.h b/REORG.TODO/sysdeps/posix/dl-fileid.h
new file mode 100644
index 0000000000..0ab98272ba
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/dl-fileid.h
@@ -0,0 +1,50 @@
+/* File identity for the dynamic linker.  Generic POSIX.1 version.
+   Copyright (C) 2015-2017 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 <stdbool.h>
+#include <sys/stat.h>
+
+/* For POSIX.1 systems, the pair of st_dev and st_ino constitute
+   a unique identifier for a file.  */
+struct r_file_id
+  {
+    dev_t dev;
+    ino64_t ino;
+  };
+
+/* Sample FD to fill in *ID.  Returns true on success.
+   On error, returns false, with errno set.  */
+static inline bool
+_dl_get_file_id (int fd, struct r_file_id *id)
+{
+  struct stat64 st;
+
+  if (__glibc_unlikely (__fxstat64 (_STAT_VER, fd, &st) < 0))
+    return false;
+
+  id->dev = st.st_dev;
+  id->ino = st.st_ino;
+  return true;
+}
+
+/* Compare two results from _dl_get_file_id for equality.  */
+static inline bool
+_dl_file_id_match_p (const struct r_file_id *a, const struct r_file_id *b)
+{
+  return a->dev == b->dev && a->ino == b->ino;
+}