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, 71 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/select.c b/REORG.TODO/sysdeps/unix/sysv/linux/select.c
new file mode 100644
index 0000000000..be4a456a51
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/select.c
@@ -0,0 +1,71 @@
+/* Linux select implementation.
+   Copyright (C) 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 <sys/time.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <errno.h>
+#include <sysdep-cancel.h>
+
+/* Check the first NFDS descriptors each in READFDS (if not NULL) for read
+   readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS
+   (if not NULL) for exceptional conditions.  If TIMEOUT is not NULL, time out
+   after waiting the interval specified therein.  Returns the number of ready
+   descriptors, or -1 for errors.  */
+
+#ifdef __NR__newselect
+# undef __NR_select
+# define __NR_select __NR__newselect
+#endif
+
+int
+__select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+	  struct timeval *timeout)
+{
+#ifdef __NR_select
+  return SYSCALL_CANCEL (select, nfds, readfds, writefds, exceptfds,
+			 timeout);
+#else
+  int result;
+  struct timespec ts, *tsp = NULL;
+
+  if (timeout)
+    {
+      TIMEVAL_TO_TIMESPEC (timeout, &ts);
+      tsp = &ts;
+    }
+
+  result = SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, tsp,
+			   NULL);
+
+  if (timeout)
+    {
+      /* Linux by default will update the timeout after a pselect6 syscall
+         (though the pselect() glibc call suppresses this behavior).
+         Since select() on Linux has the same behavior as the pselect6
+         syscall, we update the timeout here.  */
+      TIMESPEC_TO_TIMEVAL (timeout, &ts);
+    }
+
+  return result;
+#endif
+}
+libc_hidden_def (__select)
+
+weak_alias (__select, select)
+weak_alias (__select, __libc_select)