[[PATCH RFC 2] 29/63] Y2038: add function __timerfd_gettime64

["Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr>]

For Linux this uses the 32-bit time syscall so it converts the
syscall output from 32-bit time to 64-bit time.
---
 rt/Makefile                                        |  3 +-
 rt/Versions                                        |  1 +
 rt/timerfd_gettime64.c                             | 29 +++++++++++++++
 sysdeps/unix/sysv/linux/arm/librt.abilist          |  1 +
 .../sysv/linux/powerpc/powerpc32/librt.abilist     |  1 +
 sysdeps/unix/sysv/linux/timerfd_gettime64.c        | 43 ++++++++++++++++++++++
 6 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 rt/timerfd_gettime64.c
 create mode 100644 sysdeps/unix/sysv/linux/timerfd_gettime64.c

diff --git a/rt/Makefile b/rt/Makefile
index 6d6b896ee9..c0aad5d8e2 100644
--- a/rt/Makefile
+++ b/rt/Makefile
@@ -32,7 +32,8 @@ clock-routines := get_clockfreq clock_getcpuclockid			\
 		  clock_getres clock_gettime clock_settime		\
 		  clock_nanosleep
 timer-routines := timer_create timer_delete timer_getoverr		\
-		  timer_gettime timer_settime
+		  timer_gettime timer_settime                           \
+		  timerfd_gettime64
 shm-routines   := shm_open shm_unlink
 mq-routines    := mq_open mq_close mq_unlink mq_getattr mq_setattr	\
 		  mq_notify mq_send mq_receive mq_timedsend		\
diff --git a/rt/Versions b/rt/Versions
index 181e5e16ad..ad1e50748a 100644
--- a/rt/Versions
+++ b/rt/Versions
@@ -40,5 +40,6 @@ librt {
   GLIBC_2.27 {
    __timer_gettime64;
    __timer_settime64;
+   __timerfd_gettime64;
   }
 }
diff --git a/rt/timerfd_gettime64.c b/rt/timerfd_gettime64.c
new file mode 100644
index 0000000000..72d0b68a4a
--- /dev/null
+++ b/rt/timerfd_gettime64.c
@@ -0,0 +1,29 @@
+/* Get current value of timer TIMERID and store it in VALUE.
+
+   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 <time.h>
+
+int
+__timerfd_gettime64 (int fd, struct itimerspec *value)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (__timerfd_gettime64)
diff --git a/sysdeps/unix/sysv/linux/arm/librt.abilist b/sysdeps/unix/sysv/linux/arm/librt.abilist
index d76ec99c0a..a329b25661 100644
--- a/sysdeps/unix/sysv/linux/arm/librt.abilist
+++ b/sysdeps/unix/sysv/linux/arm/librt.abilist
@@ -1,6 +1,7 @@
 GLIBC_2.27 GLIBC_2.27 A
 GLIBC_2.27 __timer_gettime64 F
 GLIBC_2.27 __timer_settime64 F
+GLIBC_2.27 __timerfd_gettime64 F
 GLIBC_2.4 GLIBC_2.4 A
 GLIBC_2.4 aio_cancel F
 GLIBC_2.4 aio_cancel64 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/librt.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/librt.abilist
index cd7b5f1b97..ec80f749ae 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/librt.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/librt.abilist
@@ -32,6 +32,7 @@ GLIBC_2.2 timer_settime F
 GLIBC_2.27 GLIBC_2.27 A
 GLIBC_2.27 __timer_gettime64 F
 GLIBC_2.27 __timer_settime64 F
+GLIBC_2.27 __timerfd_gettime64 F
 GLIBC_2.3.4 GLIBC_2.3.4 A
 GLIBC_2.3.4 mq_close F
 GLIBC_2.3.4 mq_getattr F
diff --git a/sysdeps/unix/sysv/linux/timerfd_gettime64.c b/sysdeps/unix/sysv/linux/timerfd_gettime64.c
new file mode 100644
index 0000000000..0c79ba41f1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/timerfd_gettime64.c
@@ -0,0 +1,43 @@
+/* Get current value of timer TIMERID and store it in VALUE.
+
+   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; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sysdep.h>
+#include "kernel-posix-timers.h"
+
+int
+__timerfd_gettime64 (int fd, struct __itimerspec64 *value)
+{
+  int res;
+  struct itimerspec value32;
+
+  res = INLINE_SYSCALL (timerfd_gettime, 2, fd, &value32);
+
+  if (res == 0)
+    {
+      value->it_value.tv_sec = value32.it_value.tv_sec;
+      value->it_value.tv_nsec = value32.it_value.tv_nsec;
+      value->it_interval.tv_sec = value32.it_interval.tv_sec;
+      value->it_interval.tv_nsec = value32.it_interval.tv_nsec;
+    }
+
+  return res;
+}
-- 
2.14.1