Y2038: add function __stime64

These implementations use only 32-bit time kernel syscalls.

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

5 files changed, 114 insertions, 1 deletions

diff --git a/sysdeps/unix/sysv/linux/stime.c b/sysdeps/unix/sysv/linux/stime.c
new file mode 100644
index 0000000000..5a40626ef3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/stime.c
@@ -0,0 +1,41 @@
+/* Set the system clock on a Linux kernel 
+
+   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 <errno.h>
+#include <stddef.h>		/* For NULL.  */
+#include <sys/time.h>
+#include <time.h>
+
+/* Set the system clock to *WHEN.  */
+
+int
+stime (const time_t *when)
+{
+  struct timeval tv;
+
+  if (when == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  tv.tv_sec = *when;
+  tv.tv_usec = 0;
+  return __settimeofday (&tv, (struct timezone *) 0);
+}
diff --git a/sysdeps/unix/sysv/linux/stime64.c b/sysdeps/unix/sysv/linux/stime64.c
new file mode 100644
index 0000000000..94605d2da9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/stime64.c
@@ -0,0 +1,54 @@
+/* Set the system clock on a Linux kernel 
+
+   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 <errno.h>
+#include <stddef.h>		/* For NULL.  */
+#include <sys/time.h>
+#include <time.h>
+
+/* Set the system clock to *WHEN.  */
+
+extern int __y2038_linux_support;
+
+int
+__stime64 (const __time64_t *when)
+{
+  struct timeval tv32;
+
+  if (when == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  if (__y2038_linux_support)
+  {
+    /* TODO: implement 64-bit-time syscall case */
+  }
+
+  if (*when > INT_MAX)
+    {
+      __set_errno (EOVERFLOW);
+      return -1;
+    }
+
+  tv32.tv_sec = *when;
+  tv32.tv_usec = 0;
+  return __settimeofday (&tv32, (struct timezone *) 0);
+}
diff --git a/time/Makefile b/time/Makefile
index 172e8438f2..2d57b7a7e0 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -31,7 +31,7 @@ headers := time.h sys/time.h sys/timeb.h bits/time.h			\
 
 routines := offtime asctime clock ctime ctime_r difftime \
 	    gmtime localtime mktime time		 \
-	    time64					 \
+	    time64 stime64				 \
 	    gettimeofday settimeofday adjtime tzset	 \
 	    tzfile getitimer setitimer			 \
 	    stime dysize timegm ftime			 \
diff --git a/time/Versions b/time/Versions
index 503a4f46cc..2685126271 100644
--- a/time/Versions
+++ b/time/Versions
@@ -85,5 +85,6 @@ libc {
     __futimes64;
     __lutimes64;
     __time64;
+    __stime64;
   }
 }
diff --git a/time/stime.c b/time/stime.c
index 0378e23888..5d22aaae61 100644
--- a/time/stime.c
+++ b/time/stime.c
@@ -35,3 +35,20 @@ stime (const time_t *when)
 }
 
 stub_warning (stime)
+
+/* 64-bit time version */
+
+int
+__stime64 (const __time64_t *when)
+{
+  if (when == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+stub_warning (__stime64)