Y2038: add function __gettimeofday64

Implementing a 64-bit settimeofday requires adding a new
file to build under time/ and we cannot name that new file
'settimeofday.c' or it will break the 32-bit settimeofday
symbol, so we call it 'settimeofday64.c'.

1 files changed, 52 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/gettimeofday64.c b/sysdeps/unix/sysv/linux/gettimeofday64.c
new file mode 100644
index 0000000..e1538a9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/gettimeofday64.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 2015-2018 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/time.h>
+
+#undef __gettimeofday
+
+#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
+# define HAVE_VSYSCALL
+#include <sysdep-vdso.h>
+#endif
+
+/* Get the current time of day and timezone information,
+   putting it into *tv and *tz.  If tz is null, *tz is not filled.
+   Returns 0 on success, -1 on errors.  */
+
+int
+__gettimeofday64 (struct __timeval64 *tv, struct timezone *tz)
+{
+  struct timeval tv32;
+  int result;
+
+#ifdef __vdso_gettimeofday
+  result = INLINE_VSYSCALL (gettimeofday, 2, &tv32, tz);
+#else
+  result = INLINE_SYSCALL (gettimeofday, 2, &tv32, tz);
+#endif
+
+  if (result == 0)
+    {
+      tv->tv_sec = tv32.tv_sec;
+      tv->tv_usec = tv32.tv_usec;
+    }
+
+  return result;
+}