Y2038: add function __time_t64

These implementations use only 32-bit time kernel syscalls.

Therefore, stime() will always set errno to EOVERFLOW and return -1 for dates beyond Y2038.

4 files changed, 62 insertions, 0 deletions

diff --git a/sysdeps/posix/time.c b/sysdeps/posix/time.c
index 6d0bb4bafc..1a3fd4e666 100644
--- a/sysdeps/posix/time.c
+++ b/sysdeps/posix/time.c
@@ -38,3 +38,29 @@ time (time_t *t)
   return result;
 }
 libc_hidden_def (time)
+
+/* 64-bit time version */
+
+extern int __y2038_linux_support;
+
+__time64_t
+__time_t64 (__time64_t *t)
+{
+  struct timeval tv32;
+  __time64_t result;
+
+  if (__y2038_linux_support)
+  {
+    /* TODO: implement using 64-bit time syscall */
+  }
+
+  if (__gettimeofday (&tv32, (struct timezone *) NULL))
+    result = (__time64_t) -1;
+  else
+    result = (__time64_t) tv32.tv_sec;
+
+  if (t != NULL)
+    *t = result;
+
+  return result;
+}
diff --git a/sysdeps/unix/sysv/linux/time.c b/sysdeps/unix/sysv/linux/time.c
index 69116af059..b68c0b7800 100644
--- a/sysdeps/unix/sysv/linux/time.c
+++ b/sysdeps/unix/sysv/linux/time.c
@@ -34,6 +34,28 @@ time (time_t *t)
 }
 libc_hidden_def (time)
 
+/* 64-BIT TIME VERSION */
+
+extern int __y2038_linux_support;
+
+__time64_t
+__time_t64 (__time64_t *t)
+{
+  INTERNAL_SYSCALL_DECL (err);
+  __time64_t res;
+
+  if (__y2038_linux_support)
+    {
+      /* TODO: implement using 64-bit time syscall */
+    }
+
+  res = INTERNAL_SYSCALL (time, err, 1, NULL);
+  /* There cannot be any error.  */
+  if (t != NULL)
+    *t = res;
+  return res;
+}
+
 #else
 
 # include <sysdeps/posix/time.c>
diff --git a/time/Versions b/time/Versions
index e626dff8ec..e09465b8a1 100644
--- a/time/Versions
+++ b/time/Versions
@@ -84,5 +84,6 @@ libc {
     __sigtimedwait64;
     __futimes64;
     __lutimes64;
+    __time_t64;
   }
 }
diff --git a/time/time.c b/time/time.c
index 4996d26f13..2b296b7471 100644
--- a/time/time.c
+++ b/time/time.c
@@ -31,3 +31,16 @@ time (time_t *timer)
 libc_hidden_def (time)
 
 stub_warning (time)
+
+/* 64-bit time version */
+
+__time64_t
+__time_t64 (__time64_ *timer)
+{
+  __set_errno (ENOSYS);
+
+  if (timer != NULL)
+    *timer = (__time64_t) -1;
+  return (__time64_t) -1;
+}
+libc_hidden_def (__time_t64)