[[PATCH RFC 2] 18/63] Y2038: add function __clock_nanosleep64

["Albert ARIBAUD (3ADEV)" <albert dot aribaud at 3adev dot fr>]

---
 include/time.h                            |  3 +++
 sysdeps/unix/sysv/linux/clock_nanosleep.c | 42 ++++++++++++++++++++++++++++++-
 time/Versions                             |  1 +
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/include/time.h b/include/time.h
index 37909fae9a..82932f9afd 100644
--- a/include/time.h
+++ b/include/time.h
@@ -39,6 +39,9 @@ extern int __clock_settime64 (clockid_t __clock_id,
 			       const struct __timespec64 *__tp) __THROW;
 extern int __clock_getres64 (clockid_t __clock_id,
 			      struct __timespec64 *__res) __THROW;
+extern int __clock_nanosleep64 (clockid_t __clock_id, int __flags,
+				const struct __timespec64 *__req,
+				struct __timespec64 *__rem);
 
 /* Now define the internal interfaces.  */
 struct tm;
diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
index 93d5d6ef12..4249ccd3ff 100644
--- a/sysdeps/unix/sysv/linux/clock_nanosleep.c
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -21,7 +21,6 @@
 #include <sysdep-cancel.h>
 #include "kernel-posix-cpu-timers.h"
 
-
 /* We can simply use the syscall.  The CPU clocks are not supported
    with this function.  */
 int
@@ -52,3 +51,44 @@ __clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
 	  ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
 }
 weak_alias (__clock_nanosleep, clock_nanosleep)
+
+/* 64-bit time version */
+
+extern int __y2038_linux_support;
+
+int
+__clock_nanosleep64 (clockid_t clock_id, int flags,
+		   const struct __timespec64 *req,
+                   struct __timespec64 *rem)
+{
+  /* Until Linux provides a 64-bit syscall, use the 32-bit one */
+  INTERNAL_SYSCALL_DECL (err);
+  int r;
+  struct timespec req32, rem32, *rem32p = NULL;
+
+  if (req == NULL)
+    {
+      __set_errno(EFAULT);
+      return -1;
+    }
+
+  if (req->tv_sec > INT32_MAX || req->tv_sec < INT32_MIN)
+    {
+      __set_errno(EOVERFLOW);
+      return -1;
+    }
+
+  req32.tv_sec = req->tv_sec;
+  req32.tv_nsec = req->tv_nsec;
+  if (rem !=NULL) rem32p = &rem32;
+
+  r = clock_nanosleep(clock_id, flags, &req32, rem32p);
+
+  if (r == 0 && rem != NULL)
+    {
+      rem->tv_sec = rem32.tv_sec;
+      rem->tv_nsec = rem32.tv_nsec;
+    }
+
+  return r;
+}
diff --git a/time/Versions b/time/Versions
index 98ac0abfbe..6fe9373913 100644
--- a/time/Versions
+++ b/time/Versions
@@ -77,5 +77,6 @@ libc {
     __y2038_kernel_support;
     __clock_settime64;
     __clock_getres64;
+    __clock_nanosleep64;
   }
 }
-- 
2.14.1