* sysdeps/unix/sysv/linux/powerpc/bits/stat.h: Define UTIME_NOW and

	UTIME_OMIT.
	* sysdeps/unix/sysv/linux/x86_64/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_UTIMENSAT.
	* io/sys/stat.h: Declare utimensat, futimens.
	* io/utimensat.c: New file.
	* io/futimens.c: New file.
	* sysdeps/unix/sysv/linux/utimensat.c: New file.
	* sysdeps/unix/sysv/linux/futimens.c: New file.
	* io/Makefile (routines): Add utimensat, futimens.
	* io/Versions: Add utimensat, futimens to GLIBC_2.6.
	* sysdeps/unix/sysv/linux/lutimes.c: New file.
	* sysdeps/unix/sysv/linux/futimes.c: Use utimensat syscall if
	available.

	* include/sys/cdefs.h: Redefine __nonnull so that test for
	incorrect parameters in the libc code itself are not omitted.

18 files changed, 367 insertions, 15 deletions

diff --git a/ChangeLog b/ChangeLog
index 4a6d5a2..aa65ec6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,28 @@
+2007-05-10  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/unix/sysv/linux/powerpc/bits/stat.h: Define UTIME_NOW and
+	UTIME_OMIT.
+	* sysdeps/unix/sysv/linux/x86_64/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/sparc/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/ia64/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/s390/bits/stat.h: Likewise.
+	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_UTIMENSAT.
+	* io/sys/stat.h: Declare utimensat, futimens.
+	* io/utimensat.c: New file.
+	* io/futimens.c: New file.
+	* sysdeps/unix/sysv/linux/utimensat.c: New file.
+	* sysdeps/unix/sysv/linux/futimens.c: New file.
+	* io/Makefile (routines): Add utimensat, futimens.
+	* io/Versions: Add utimensat, futimens to GLIBC_2.6.
+	* sysdeps/unix/sysv/linux/lutimes.c: New file.
+	* sysdeps/unix/sysv/linux/futimes.c: Use utimensat syscall if
+	available.
+
+	* include/sys/cdefs.h: Redefine __nonnull so that test for
+	incorrect parameters in the libc code itself are not omitted.
+
 2007-05-09  Jakub Jelinek  <jakub@redhat.com>
 
 	* sysdeps/ia64/fpu/fraiseexcpt.c (feraiseexcept): Don't raise overflow
diff --git a/io/Makefile b/io/Makefile
index 206435d..81078ae 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -51,7 +51,8 @@ routines :=								\
 	ftw ftw64 fts poll ppoll					\
 	posix_fadvise posix_fadvise64					\
 	posix_fallocate posix_fallocate64				\
-	sendfile sendfile64
+	sendfile sendfile64 \
+	utimensat futimens
 
 # These routines will be omitted from the libc shared object.
 # Instead the static object files will be included in a special archive
diff --git a/io/Versions b/io/Versions
index bc9c9d2..9cc5157 100644
--- a/io/Versions
+++ b/io/Versions
@@ -113,4 +113,7 @@ libc {
 
     ppoll;
   }
+  GLIBC_2.6 {
+    utimensat; futimens;
+  }
 }
diff --git a/io/futimens.c b/io/futimens.c
new file mode 100644
index 0000000..1d0fafe
--- /dev/null
+++ b/io/futimens.c
@@ -0,0 +1,36 @@
+/* Change access and modification times of open file.  Linux version.
+   Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <sysdep.h>
+
+
+/* Change the access time of the file associated with FD to TSP[0] and
+   the modification time of FILE to TSP[1].  */
+int
+futimens (int fd, const struct timespec tsp[2])
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (futimens)
+#include <stub-tag.h>
diff --git a/io/sys/stat.h b/io/sys/stat.h
index d1f4484..2ffa4fc 100644
--- a/io/sys/stat.h
+++ b/io/sys/stat.h
@@ -28,7 +28,7 @@
 
 #include <bits/types.h>		/* For __mode_t and __dev_t.  */
 
-#if defined __USE_XOPEN || defined __USE_MISC
+#if defined __USE_XOPEN || defined __USE_XOPEN2K || defined __USE_MISC
 # if defined __USE_XOPEN || defined __USE_XOPEN2K
 #  define __need_time_t
 # endif
@@ -354,6 +354,21 @@ extern int mkfifoat (int __fd, __const char *__path, __mode_t __mode)
      __THROW __nonnull ((2));
 #endif
 
+#ifdef __USE_ATFILE
+/* Set file access and modification times relative to directory file
+   descriptor.  */
+extern int utimensat (int __fd, __const char *__path,
+		      __const struct timespec __times[2],
+		      int __flags)
+     __THROW __nonnull ((2));
+#endif
+
+#ifdef __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+/* Set file access and modification times of the file associated with FD.  */
+extern int futimens (int __fd, __const struct timespec __times[2]) __THROW;
+#endif
+
 /* To allow the `struct stat' structure and the file type `mode_t'
    bits to vary without changing shared library major version number,
    the `stat' family of functions and `mknod' are in fact inline
diff --git a/io/utimensat.c b/io/utimensat.c
new file mode 100644
index 0000000..3b9e7ef
--- /dev/null
+++ b/io/utimensat.c
@@ -0,0 +1,34 @@
+/* Change access and modification times of open file.  Stub version.
+   Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sys/stat.h>
+
+
+/* Change the access time of FILE to TSP[0] and
+   the modification time of FILE to TSP[1].  */
+int
+utimensat (int fd, const char *file, const struct timespec tsp[2],
+	   int flags)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (utimensat)
+#include <stub-tag.h>
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/stat.h b/sysdeps/unix/sysv/linux/alpha/bits/stat.h
index 40b6853..42748be 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/stat.h
@@ -149,3 +149,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/bits/stat.h b/sysdeps/unix/sysv/linux/bits/stat.h
index e08899c..cc665f3 100644
--- a/sysdeps/unix/sysv/linux/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/bits/stat.h
@@ -161,3 +161,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/futimens.c b/sysdeps/unix/sysv/linux/futimens.c
new file mode 100644
index 0000000..67f2588
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/futimens.c
@@ -0,0 +1,45 @@
+/* Change access and modification times of open file.  Linux version.
+   Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <sysdep.h>
+
+
+/* Change the access time of the file associated with FD to TSP[0] and
+   the modification time of FILE to TSP[1].
+
+   Starting with 2.6.22 the Linux kernel has the utimensat syscall which
+   can be used to implement futimens.  */
+int
+futimens (int fd, const struct timespec tsp[2])
+{
+#ifdef __NR_utimensat
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, tsp, 0);
+#else
+  __set_errno (ENOSYS);
+  return -1;
+#endif
+}
+#ifndef __NR_utimensat
+stub_warning (futimens)
+# include <stub-tag.h>
+#endif
diff --git a/sysdeps/unix/sysv/linux/futimes.c b/sysdeps/unix/sysv/linux/futimes.c
index b307c3f..610f1de 100644
--- a/sysdeps/unix/sysv/linux/futimes.c
+++ b/sysdeps/unix/sysv/linux/futimes.c
@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <sysdep.h>
 #include <string.h>
+#include <time.h>
 #include <utime.h>
 #include <sys/time.h>
 #include <stdio-common/_itoa.h>
@@ -27,32 +28,67 @@
 
 #include <kernel-features.h>
 
-/* Change the access time of FILE to TVP[0] and
-   the modification time of FILE to TVP[1], but do not follow symlinks.
 
-   The Linux kernel has no futimes() syscall so we use the /proc
-   filesystem.  */
+#ifndef __ASSUME_UTIMENSAT
+static int miss_utimensat;
+#endif
+
+/* Change the access time of the file associated with FD to TVP[0] and
+   the modification time of FILE to TVP[1].
+
+   Starting with 2.6.22 the Linux kernel has the utimensat syscall which
+   can be used to implement futimes.  Earlier kernels have no futimes()
+   syscall so we use the /proc filesystem.  */
 int
 __futimes (int fd, const struct timeval tvp[2])
 {
+  /* The utimensat system call expects timespec not timeval.  */
+  struct timespec ts[2];
+  if (tvp != NULL)
+    {
+      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
+      TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
+    }
+
+#ifdef __ASSUME_UTIMENSAT
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
+#else
+  int result;
+# ifdef __NR_utimensat
+  if (!__builtin_expect (miss_utimensat, 0))
+    {
+      result = INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
+      if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)
+	return result;
+
+      miss_utimensat = 1;
+    }
+# endif
+
   static const char selffd[] = "/proc/self/fd/";
   char fname[sizeof (selffd) + 3 * sizeof (int)];
   fname[sizeof (fname) - 1] = '\0';
   char *cp = _itoa_word ((unsigned int) fd, fname + sizeof (fname) - 1, 10, 0);
   cp = memcpy (cp - sizeof (selffd) + 1, selffd, sizeof (selffd) - 1);
 
-  int result;
-#ifdef __NR_utimes
+# ifdef __NR_utimes
   result = INLINE_SYSCALL (utimes, 2, cp, tvp);
-# ifndef __ASSUME_UTIMES
+#  ifndef __ASSUME_UTIMES
   if (result == -1 && errno == ENOSYS)
+#  endif
 # endif
-#endif
     {
       /* The utimes() syscall does not exist or is not available in the
 	 used kernel.  Use utime().  For this we have to convert to the
 	 data format utime() expects.  */
-#ifndef __ASSUME_UTIMES
+# ifndef __ASSUME_UTIMES
       struct utimbuf buf;
       struct utimbuf *times;
 
@@ -66,7 +102,7 @@ __futimes (int fd, const struct timeval tvp[2])
 	times = NULL;
 
       result = INLINE_SYSCALL (utime, 2, cp, times);
-#endif
+# endif
     }
 
   if (result == -1)
@@ -88,14 +124,15 @@ __futimes (int fd, const struct timeval tvp[2])
       case ENOENT:
 	/* Validate the file descriptor by letting fcntl set errno to
 	   EBADF if it's bogus.  Otherwise it's a /proc issue.  */
-#if !defined __NR_fcntl && defined __NR_fcntl64
-# define __NR_fcntl __NR_fcntl64
-#endif
+# if !defined __NR_fcntl && defined __NR_fcntl64
+#  define __NR_fcntl __NR_fcntl64
+# endif
 	if (INLINE_SYSCALL (fcntl, 3, fd, F_GETFD, 0) != -1)
 	  __set_errno (ENOSYS);
 	break;
       }
 
   return result;
+#endif
 }
 weak_alias (__futimes, futimes)
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/stat.h b/sysdeps/unix/sysv/linux/ia64/bits/stat.h
index f6b6671..1988c49 100644
--- a/sysdeps/unix/sysv/linux/ia64/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/ia64/bits/stat.h
@@ -138,3 +138,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index e54f675..ed32001 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -458,3 +458,8 @@
 #if __LINUX_KERNEL_VERSION >= 0x020612
 # define __ASSUME_FUTEX_LOCK_PI	1
 #endif
+
+/* Support for utimensat syscall was added in 2.6.22.  */
+#if __LINUX_KERNEL_VERSION >= 0x020616
+# define __ASSUME_UTIMENSAT	1
+#endif
diff --git a/sysdeps/unix/sysv/linux/lutimes.c b/sysdeps/unix/sysv/linux/lutimes.c
new file mode 100644
index 0000000..7ea91c3
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/lutimes.c
@@ -0,0 +1,59 @@
+/* Change access and/or modification date of file.  Do not follow symbolic
+   links.
+   Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+
+
+int
+lutimes (const char *file, const struct timeval tvp[2])
+{
+#ifdef __NR_utimensat
+  /* The system call espects timespec, not timeval.  */
+  struct timespec ts[2];
+  if (tvp != NULL)
+    {
+      if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+          || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
+      TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
+    }
+
+  return INLINE_SYSCALL (utimensat, 4, AT_FDCWD, file, tvp ? ts : NULL,
+  			 AT_SYMLINK_NOFOLLOW);
+#else
+  __set_errno (ENOSYS);
+  return -1;
+#endif
+}
+
+#ifndef __NR_utimensat
+stub_warning (lutimes)
+# include <stub-tag.h>
+#endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/stat.h b/sysdeps/unix/sysv/linux/powerpc/bits/stat.h
index b020504..53457ef 100644
--- a/sysdeps/unix/sysv/linux/powerpc/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/stat.h
@@ -265,3 +265,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/s390/bits/stat.h b/sysdeps/unix/sysv/linux/s390/bits/stat.h
index c8ff532..00fcf07 100644
--- a/sysdeps/unix/sysv/linux/s390/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/s390/bits/stat.h
@@ -254,3 +254,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/stat.h b/sysdeps/unix/sysv/linux/sparc/bits/stat.h
index 2fccb14..17c912a 100644
--- a/sysdeps/unix/sysv/linux/sparc/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/sparc/bits/stat.h
@@ -163,3 +163,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif
diff --git a/sysdeps/unix/sysv/linux/utimensat.c b/sysdeps/unix/sysv/linux/utimensat.c
new file mode 100644
index 0000000..f9b60a0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/utimensat.c
@@ -0,0 +1,50 @@
+/* Change access and modification times of open file.  Linux version.
+   Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sys/stat.h>
+#include <sysdep.h>
+
+#include <kernel-features.h>
+
+
+/* Change the access time of FILE to TSP[0] and
+   the modification time of FILE to TSP[1].
+
+   Starting with 2.6.22 the Linux kernel has the utimensat syscall.  */
+int
+utimensat (int fd, const char *file, const struct timespec tsp[2],
+	   int flags)
+{
+  if (file == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+#ifdef __NR_utimensat
+  return INLINE_SYSCALL (utimensat, 4, fd, file, tsp, flags);
+#else
+  __set_errno (ENOSYS);
+  return -1;
+#endif
+}
+#ifndef __NR_utimensat
+stub_warning (utimensat)
+# include <stub-tag.h>
+#endif
diff --git a/sysdeps/unix/sysv/linux/x86_64/bits/stat.h b/sysdeps/unix/sysv/linux/x86_64/bits/stat.h
index e756d7e..add2c8e 100644
--- a/sysdeps/unix/sysv/linux/x86_64/bits/stat.h
+++ b/sysdeps/unix/sysv/linux/x86_64/bits/stat.h
@@ -201,3 +201,9 @@ struct stat64
 #define	__S_IREAD	0400	/* Read by owner.  */
 #define	__S_IWRITE	0200	/* Write by owner.  */
 #define	__S_IEXEC	0100	/* Execute by owner.  */
+
+#if defined __USE_ATFILE || defined __USE_GNU
+/* XXX This will change to the macro for the next 2008 POSIX revision.  */
+# define UTIME_NOW	((1l << 30) - 1l)
+# define UTIME_OMIT	((1l << 30) - 2l)
+#endif