* io/Makefile (routines): Add fstatat, fstatat64, fxstatat, fxstatat64,

	fchownat, and unlinkat.
	(static-only-routines): Add fstatat and fstatat64.
	(tests): Add tst-unlinkat, tst-fstatat, tst-futimesat, tst-renameat,
	and tst-fchownat.
	* io/Versions [GLIBC_2.4]: Add fchownat, __fxstatat, __fxstatat64,
	and unlinkat.
	* io/fcntl.h: Define AT_FDCWD, AT_SYMLINK_NOFOLLOW, and AT_REMOVEDIR.
	* io/fstatat.c: New file.
	* io/fstatat64.c: New file.
	* io/sys/stat.h: Declare fstatat, fstatat64, __fxstatat, __fxstatat64
	and define fstatat and fstatat64 inline functions.
	* libio/stdio.h: Declare renameat.
	* misc/Makefile (routines): Add futimesat.
	* misc/Versions [GLIBC_2.4]: Add futimesat.
	* posix/unistd.h: Declare fchownat and unlinkat.
	* stdio-common/Makefile (routines): Add renameat.
	* stdio-common/Versions [GLIBC_2.4]: Add renameat.
	* sysdeps/generic/fchownat.c: New file.
	* sysdeps/generic/futimesat.c: New file.
	* sysdeps/generic/fxstatat.c: New file.
	* sysdeps/generic/fxstatat64.c: New file.
	* sysdeps/generic/renameat.c: New file.
	* sysdeps/generic/unlinkat.c: New file.
	* sysdeps/unix/sysv/linux/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/futimesat.c: New file.
	* sysdeps/unix/sysv/linux/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/fxstatat64.c: New file.
	* sysdeps/unix/sysv/linux/renameat.c: New file.
	* sysdeps/unix/sysv/linux/unlinkat.c: New file.
	* sysdeps/unix/sysv/linux/alpha/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/i386/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/i386/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/m68k/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/m68k/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/s390/s390-32/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/sh/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/sh/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc32/fchownat.c: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc32/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: New file.
	* sysdeps/unix/sysv/linux/wordsize-64/fxstatat64.c: New file.
	* time/sys/time.h: Declare futimesat.
	* include/fcntl.h: Declare __atfct_seterrno.
	* sysdeps/unix/sysv/linux/openat.c (__atfct_seterrno): New function.
	Split out from openat code and called.
	(do_test): Allow openat to fail with ENOSYS.  Handle AT_FDCWD.
	* sysdeps/generic/openat.c: Handle AT_FDCWD.
	* sysdeps/generic/openat64.c: Likewise.
	* io/tst-unlinkat.c: New file.
	* io/tst-fstatat.c: New file.
	* io/tst-futimesat.c: New file.
	* io/tst-renameat.c: New file.
	* io/tst-fchownat.c: New file.
	* io/tst-openat.c: Don't fail if openat is not implemented.

	* sysdeps/unix/sysv/linux/powerpc/chown.c: Don't provide backward
	compatibility code if new kernel is guaranteed.

	* time/sys/time.h: Add a few nonnull attributes.

12 files changed, 969 insertions, 25 deletions

diff --git a/io/Makefile b/io/Makefile
index b1ca468..9339ffe 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -26,40 +26,43 @@ headers := sys/stat.h bits/stat.h sys/statfs.h bits/statfs.h sys/vfs.h \
 	   poll.h sys/poll.h bits/poll.h \
 	   utime.h ftw.h fts.h sys/sendfile.h
 
-routines :=							      \
-	utime							      \
-	mkfifo							      \
-	stat fstat lstat mknod stat64 fstat64 lstat64		      \
-	xstat fxstat lxstat xmknod xstat64 fxstat64 lxstat64	      \
-	statfs fstatfs statfs64 fstatfs64			      \
-	statvfs fstatvfs statvfs64 fstatvfs64			      \
-	umask chmod fchmod lchmod mkdir				      \
-	open open64 openat openat64 close			      \
-	read write lseek lseek64 access euidaccess		      \
-	fcntl flock lockf lockf64				      \
-	dup dup2 pipe						      \
-	creat creat64						      \
-	chdir fchdir						      \
-	getcwd getwd getdirname					      \
-	chown fchown lchown					      \
-	ttyname ttyname_r isatty				      \
-	link symlink readlink					      \
-	unlink rmdir						      \
-	ftw ftw64 fts poll					      \
-	posix_fadvise posix_fadvise64				      \
-	posix_fallocate posix_fallocate64			      \
+routines :=								\
+	utime								\
+	mkfifo								\
+	stat fstat lstat mknod stat64 fstat64 lstat64 fstatat fstatat64	\
+	xstat fxstat lxstat xmknod xstat64 fxstat64 lxstat64		\
+	fxstatat fxstatat64						\
+	statfs fstatfs statfs64 fstatfs64				\
+	statvfs fstatvfs statvfs64 fstatvfs64				\
+	umask chmod fchmod lchmod mkdir					\
+	open open64 openat openat64 close				\
+	read write lseek lseek64 access euidaccess			\
+	fcntl flock lockf lockf64					\
+	dup dup2 pipe							\
+	creat creat64							\
+	chdir fchdir							\
+	getcwd getwd getdirname						\
+	chown fchown lchown fchownat					\
+	ttyname ttyname_r isatty					\
+	link symlink readlink						\
+	unlink unlinkat rmdir						\
+	ftw ftw64 fts poll						\
+	posix_fadvise posix_fadvise64					\
+	posix_fallocate posix_fallocate64				\
 	sendfile sendfile64
 
 # These routines will be omitted from the libc shared object.
 # Instead the static object files will be included in a special archive
 # linked against when the shared library will be used.
-static-only-routines = stat fstat lstat mknod stat64 fstat64 lstat64
+static-only-routines = stat fstat lstat mknod stat64 fstat64 lstat64	\
+		       fstatat fstatat64
 
 others		:= pwd
 test-srcs	:= ftwtest
 tests		:= test-utime test-stat test-stat2 test-lfs tst-getcwd \
 		   tst-fcntl bug-ftw1 bug-ftw2 bug-ftw3 bug-ftw4 tst-statvfs \
-		   tst-openat
+		   tst-openat tst-unlinkat tst-fstatat tst-futimesat \
+		   tst-renameat tst-fchownat
 
 distribute	:= ftwtest-sh
 
diff --git a/io/Versions b/io/Versions
index f5cd8d5..65ee771 100644
--- a/io/Versions
+++ b/io/Versions
@@ -98,6 +98,9 @@ libc {
     nftw; nftw64;
   }
   GLIBC_2.4 {
+    fchownat;
+    __fxstatat; __fxstatat64;
     openat; openat64;
+    unlinkat;
   }
 }
diff --git a/io/fcntl.h b/io/fcntl.h
index 044a988..8e13d33 100644
--- a/io/fcntl.h
+++ b/io/fcntl.h
@@ -56,6 +56,15 @@ __BEGIN_DECLS
 # define SEEK_END	2	/* Seek from end of file.  */
 #endif	/* XPG */
 
+#ifdef __USE_GNU
+# define AT_FDCWD		-100	/* Special value used to indicate
+					   openat should use the current
+					   working directory. */
+# define AT_SYMLINK_NOFOLLOW	0x100	/* Do not follow symbolic links.  */
+# define AT_REMOVEDIR		0x200	/* Remove directory instead of
+					   unlinking file.  */
+#endif
+
 /* Do the file control operation described by CMD on FD.
    The remaining arguments are interpreted depending on CMD.
 
diff --git a/io/fstatat.c b/io/fstatat.c
new file mode 100644
index 0000000..1ac8059
--- /dev/null
+++ b/io/fstatat.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2005 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.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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 <sys/stat.h>
+
+/* This definition is only used if inlining fails for this function; see
+   the last page of <sys/stat.h>.  The real work is done by the `x'
+   function which is passed a version number argument.  We arrange in the
+   makefile that when not inlined this function is always statically
+   linked; that way a dynamically-linked executable always encodes the
+   version number corresponding to the data structures it uses, so the `x'
+   functions in the shared library can adapt without needing to recompile
+   all callers.  */
+
+#undef fstatat
+int
+fstatat (int fd, const char *file, struct stat *buf, int flag)
+{
+  return __fxstatat (_STAT_VER, fd, file, buf, flag);
+}
+
+/* Hide the symbol so that no definition but the one locally in the
+   executable or DSO is used.  */
+#ifdef HAVE_DOT_HIDDEN
+asm (".hidden\tfstatat");
+#endif
diff --git a/io/fstatat64.c b/io/fstatat64.c
new file mode 100644
index 0000000..a14b42d
--- /dev/null
+++ b/io/fstatat64.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 2005 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.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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 <sys/stat.h>
+
+/* This definition is only used if inlining fails for this function; see
+   the last page of <sys/stat.h>.  The real work is done by the `x'
+   function which is passed a version number argument.  We arrange in the
+   makefile that when not inlined this function is always statically
+   linked; that way a dynamically-linked executable always encodes the
+   version number corresponding to the data structures it uses, so the `x'
+   functions in the shared library can adapt without needing to recompile
+   all callers.  */
+
+#undef fstatat64
+int
+fstatat64 (int fd, const char *file, struct stat64 *buf, int flag)
+{
+  return __fxstatat64 (_STAT_VER, fd, file, buf, flag);
+}
+
+/* Hide the symbol so that no definition but the one locally in the
+   executable or DSO is used.  */
+#ifdef HAVE_DOT_HIDDEN
+asm (".hidden\tfstatat64");
+#endif
diff --git a/io/sys/stat.h b/io/sys/stat.h
index 7075003..0a82ef3 100644
--- a/io/sys/stat.h
+++ b/io/sys/stat.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,1992,1995-2002,2003,2004 Free Software Foundation, Inc.
+/* Copyright (C) 1991,1992,1995-2004,2005 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
@@ -228,6 +228,23 @@ extern int stat64 (__const char *__restrict __file,
 extern int fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2));
 #endif
 
+#ifdef __USE_GNU
+/* Similar to stat, get the attributes for FILE and put them in BUF.
+   Relative path names are interpreted relative to FD unless FD is
+   AT_FDCWD.  */
+# ifndef __USE_FILE_OFFSET64
+extern int fstatat (int __fd, const char *__file, struct stat *__buf,
+		    int __flag) __THROW __nonnull ((2, 3));
+# else
+extern int __REDIRECT_NTH (fstatat, (int __fd, const char *__file,
+				     struct stat *__buf, int __flag),
+			   fstatat64) __THROW __nonnull ((2, 3));
+# endif
+
+extern int fstatat64 (int __fd, const char *__file, struct stat64 *__buf,
+		      int __flag) __THROW __nonnull ((2, 3));
+#endif
+
 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 # ifndef __USE_FILE_OFFSET64
 /* Get file attributes about FILE and put them in BUF.
@@ -327,6 +344,9 @@ extern int __xstat (int __ver, __const char *__filename,
 		    struct stat *__stat_buf) __THROW __nonnull ((2, 3));
 extern int __lxstat (int __ver, __const char *__filename,
 		     struct stat *__stat_buf) __THROW __nonnull ((2, 3));
+extern int __fxstatat (int __ver, int __fildes, __const char *__filename,
+		       struct stat *__stat_buf, int __flag)
+     __THROW __nonnull ((3, 4));
 #else
 # ifdef __REDIRECT_NTH
 extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
@@ -338,6 +358,10 @@ extern int __REDIRECT_NTH (__xstat, (int __ver, __const char *__filename,
 extern int __REDIRECT_NTH (__lxstat, (int __ver, __const char *__filename,
 				      struct stat *__stat_buf), __lxstat64)
      __nonnull ((2, 3));
+extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
+					__const char *__filename,
+					struct stat *__stat_buf, int __flag),
+			   __fxstatat64) __nonnull ((3, 4));
 
 # else
 #  define __fxstat __fxstat64
@@ -353,6 +377,9 @@ extern int __xstat64 (int __ver, __const char *__filename,
 		      struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
 extern int __lxstat64 (int __ver, __const char *__filename,
 		       struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
+extern int __fxstatat64 (int __ver, int __fildes, __const char *__filename,
+			 struct stat64 *__stat_buf, int __flag)
+     __THROW __nonnull ((3, 4));
 #endif
 extern int __xmknod (int __ver, __const char *__path, __mode_t __mode,
 		     __dev_t *__dev) __THROW __nonnull ((2, 4));
@@ -380,6 +407,15 @@ __NTH (fstat (int __fd, struct stat *__statbuf))
   return __fxstat (_STAT_VER, __fd, __statbuf);
 }
 
+# ifdef __USE_GNU
+extern __inline__ int
+__NTH (fstatat (int __fd, __const char *__filename, struct stat *__statbuf,
+		int __flag))
+{
+  return __fxstatat (_STAT_VER, __fd, __filename, __statbuf, __flag);
+}
+# endif
+
 # if defined __USE_MISC || defined __USE_BSD
 extern __inline__ int
 __NTH (mknod (__const char *__path, __mode_t __mode, __dev_t __dev))
@@ -412,6 +448,15 @@ __NTH (fstat64 (int __fd, struct stat64 *__statbuf))
 }
 # endif
 
+# ifdef __USE_GNU
+extern __inline__ int
+__NTH (fstatat64 (int __fd, __const char *__filename, struct stat64 *__statbuf,
+		  int __flag))
+{
+  return __fxstatat64 (_STAT_VER, __fd, __filename, __statbuf, __flag);
+}
+# endif
+
 #endif
 
 __END_DECLS
diff --git a/io/tst-fchownat.c b/io/tst-fchownat.c
new file mode 100644
index 0000000..0cbf78b
--- /dev/null
+++ b/io/tst-fchownat.c
@@ -0,0 +1,145 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+static int dir_fd;
+
+static void
+prepare (void)
+{
+#if _POSIX_CHOWN_RESTRICTED > 0
+  uid_t uid = getuid ();
+  if (uid != 0)
+    {
+      puts ("need root privileges");
+      exit (0);
+    }
+#endif
+
+  size_t test_dir_len = strlen (test_dir);
+  static const char dir_name[] = "/tst-fchownat.XXXXXX";
+
+  size_t dirbuflen = test_dir_len + sizeof (dir_name);
+  char *dirbuf = malloc (dirbuflen);
+  if (dirbuf == NULL)
+    {
+      puts ("out of memory");
+      exit (1);
+    }
+
+  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+  if (mkdtemp (dirbuf) == NULL)
+    {
+      puts ("cannot create temporary directory");
+      exit (1);
+    }
+
+  add_temp_file (dirbuf);
+
+  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
+  if (dir_fd == -1)
+    {
+      puts ("cannot open directory");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  /* fdopendir takes over the descriptor, make a copy.  */
+  int dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("1st lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  DIR *dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("fdopendir failed");
+      return 1;
+    }
+  struct dirent64 *d;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	printf ("temp directory contains file \"%s\"\n", d->d_name);
+	return 1;
+      }
+  closedir (dir);
+
+  /* Try to create a file.  */
+  int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
+      puts ("file creation failed");
+      return 1;
+    }
+  write (fd, "hello", 5);
+  puts ("file created");
+
+  struct stat64 st1;
+  if (fstat64 (fd, &st1) != 0)
+    {
+      puts ("fstat64 failed");
+      return 1;
+    }
+
+  close (fd);
+
+  if (fchownat (dir_fd, "some-file", st1.st_uid + 1, st1.st_gid + 1, 0) != 0)
+    {
+      puts ("fchownat failed");
+      return 1;
+    }
+
+  struct stat64 st2;
+  if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
+    {
+      puts ("fstatat64 failed");
+      return 1;
+    }
+
+  if (st1.st_uid + 1 != st2.st_uid || st1.st_gid + 1 != st2.st_gid)
+    {
+      puts ("owner change failed");
+      return 1;
+    }
+
+  if (unlinkat (dir_fd, "some-file", 0) != 0)
+    {
+      puts ("unlinkat failed");
+      return 1;
+    }
+
+  close (dir_fd);
+
+  return 0;
+}
diff --git a/io/tst-fstatat.c b/io/tst-fstatat.c
new file mode 100644
index 0000000..6ddf30d
--- /dev/null
+++ b/io/tst-fstatat.c
@@ -0,0 +1,143 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+static int dir_fd;
+
+static void
+prepare (void)
+{
+  size_t test_dir_len = strlen (test_dir);
+  static const char dir_name[] = "/tst-fstatat.XXXXXX";
+
+  size_t dirbuflen = test_dir_len + sizeof (dir_name);
+  char *dirbuf = malloc (dirbuflen);
+  if (dirbuf == NULL)
+    {
+      puts ("out of memory");
+      exit (1);
+    }
+
+  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+  if (mkdtemp (dirbuf) == NULL)
+    {
+      puts ("cannot create temporary directory");
+      exit (1);
+    }
+
+  add_temp_file (dirbuf);
+
+  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
+  if (dir_fd == -1)
+    {
+      puts ("cannot open directory");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  /* fdopendir takes over the descriptor, make a copy.  */
+  int dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("1st lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  DIR *dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("fdopendir failed");
+      return 1;
+    }
+  struct dirent64 *d;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	printf ("temp directory contains file \"%s\"\n", d->d_name);
+	return 1;
+      }
+  closedir (dir);
+
+  /* Try to create a file.  */
+  int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
+      puts ("file creation failed");
+      return 1;
+    }
+  write (fd, "hello", 5);
+  puts ("file created");
+
+  struct stat64 st1;
+  if (fstat64 (fd, &st1) != 0)
+    {
+      puts ("fstat64 failed");
+      return 1;
+    }
+
+  close (fd);
+
+  struct stat64 st2;
+  if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
+    {
+      puts ("fstatat64 failed");
+      return 1;
+    }
+
+  if (st1.st_dev != st2.st_dev
+      || st1.st_ino != st2.st_ino
+      || st1.st_size != st2.st_size)
+    {
+      puts ("stat results do not match");
+      return 1;
+    }
+
+  if (unlinkat (dir_fd, "some-file", 0) != 0)
+    {
+      puts ("unlinkat failed");
+      return 1;
+    }
+
+  if (fstatat64 (dir_fd, "some-file", &st2, 0) == 0)
+    {
+      puts ("second fstatat64 succeeded");
+      return 1;
+    }
+  if (errno != ENOENT)
+    {
+      puts ("second fstatat64 did not fail with ENOENT");
+      return 1;
+    }
+
+  close (dir_fd);
+
+  return 0;
+}
diff --git a/io/tst-futimesat.c b/io/tst-futimesat.c
new file mode 100644
index 0000000..c1e8d93
--- /dev/null
+++ b/io/tst-futimesat.c
@@ -0,0 +1,147 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+static int dir_fd;
+
+static void
+prepare (void)
+{
+  size_t test_dir_len = strlen (test_dir);
+  static const char dir_name[] = "/tst-futimesat.XXXXXX";
+
+  size_t dirbuflen = test_dir_len + sizeof (dir_name);
+  char *dirbuf = malloc (dirbuflen);
+  if (dirbuf == NULL)
+    {
+      puts ("out of memory");
+      exit (1);
+    }
+
+  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+  if (mkdtemp (dirbuf) == NULL)
+    {
+      puts ("cannot create temporary directory");
+      exit (1);
+    }
+
+  add_temp_file (dirbuf);
+
+  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
+  if (dir_fd == -1)
+    {
+      puts ("cannot open directory");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  /* fdopendir takes over the descriptor, make a copy.  */
+  int dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("1st lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  DIR *dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("fdopendir failed");
+      return 1;
+    }
+  struct dirent64 *d;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	printf ("temp directory contains file \"%s\"\n", d->d_name);
+	return 1;
+      }
+  closedir (dir);
+
+  /* Try to create a file.  */
+  int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
+      puts ("file creation failed");
+      return 1;
+    }
+  write (fd, "hello", 5);
+  puts ("file created");
+
+  struct stat64 st1;
+  if (fstat64 (fd, &st1) != 0)
+    {
+      puts ("fstat64 failed");
+      return 1;
+    }
+
+  close (fd);
+
+  struct timeval tv[2];
+  tv[0].tv_sec = st1.st_atime + 1;
+  tv[0].tv_usec = 0;
+  tv[1].tv_sec = st1.st_mtime + 1;
+  tv[1].tv_usec = 0;
+  if (futimesat (dir_fd, "some-file", tv) != 0)
+    {
+      puts ("futimesat failed");
+      return 1;
+    }
+
+  struct stat64 st2;
+  if (fstatat64 (dir_fd, "some-file", &st2, 0) != 0)
+    {
+      puts ("fstatat64 failed");
+      return 1;
+    }
+
+  if (st2.st_mtime != tv[1].tv_sec
+#ifdef _STATBUF_ST_NSEC
+      || st2.st_mtim.tv_nsec != 0
+#endif
+      )
+    {
+      puts ("stat shows different mtime");
+      return 1;
+    }
+
+
+  if (unlinkat (dir_fd, "some-file", 0) != 0)
+    {
+      puts ("unlinkat failed");
+      return 1;
+    }
+
+  close (dir_fd);
+
+  return 0;
+}
diff --git a/io/tst-openat.c b/io/tst-openat.c
index c20c95a..d10b654 100644
--- a/io/tst-openat.c
+++ b/io/tst-openat.c
@@ -84,6 +84,12 @@ do_test (void)
   int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
   if (fd == -1)
     {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
       puts ("file creation failed");
       return 1;
     }
diff --git a/io/tst-renameat.c b/io/tst-renameat.c
new file mode 100644
index 0000000..fb49459
--- /dev/null
+++ b/io/tst-renameat.c
@@ -0,0 +1,149 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+static int dir_fd;
+
+static void
+prepare (void)
+{
+  size_t test_dir_len = strlen (test_dir);
+  static const char dir_name[] = "/tst-renameat.XXXXXX";
+
+  size_t dirbuflen = test_dir_len + sizeof (dir_name);
+  char *dirbuf = malloc (dirbuflen);
+  if (dirbuf == NULL)
+    {
+      puts ("out of memory");
+      exit (1);
+    }
+
+  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+  if (mkdtemp (dirbuf) == NULL)
+    {
+      puts ("cannot create temporary directory");
+      exit (1);
+    }
+
+  add_temp_file (dirbuf);
+
+  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
+  if (dir_fd == -1)
+    {
+      puts ("cannot open directory");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  /* fdopendir takes over the descriptor, make a copy.  */
+  int dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("1st lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  DIR *dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("fdopendir failed");
+      return 1;
+    }
+  struct dirent64 *d;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	printf ("temp directory contains file \"%s\"\n", d->d_name);
+	return 1;
+      }
+  closedir (dir);
+
+  /* Try to create a file.  */
+  int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
+      puts ("file creation failed");
+      return 1;
+    }
+  write (fd, "hello", 5);
+  puts ("file created");
+
+  struct stat64 st1;
+  if (fstat64 (fd, &st1) != 0)
+    {
+      puts ("fstat64 failed");
+      return 1;
+    }
+
+  close (fd);
+
+  if (renameat (dir_fd, "some-file", dir_fd, "another-file") != 0)
+    {
+      puts ("renameat failed");
+      return 1;
+    }
+
+  struct stat64 st2;
+  if (fstatat64 (dir_fd, "some-file", &st2, 0) == 0)
+    {
+      puts ("fstatat64 succeeded");
+      return 1;
+    }
+  if (errno != ENOENT)
+    {
+      puts ("fstatat64 did not fail with ENOENT");
+      return 1;
+    }
+
+  if (fstatat64 (dir_fd, "another-file", &st2, 0) != 0)
+    {
+      puts ("2nd fstatat64 failed");
+      return 1;
+    }
+
+  if (st1.st_dev != st2.st_dev
+      || st1.st_ino != st2.st_ino
+      || st1.st_size != st2.st_size)
+    {
+      puts ("stat results do not match");
+      return 1;
+    }
+
+  if (unlinkat (dir_fd, "another-file", 0) != 0)
+    {
+      puts ("unlinkat failed");
+      return 1;
+    }
+
+  close (dir_fd);
+
+  return 0;
+}
diff --git a/io/tst-unlinkat.c b/io/tst-unlinkat.c
new file mode 100644
index 0000000..c25443c
--- /dev/null
+++ b/io/tst-unlinkat.c
@@ -0,0 +1,178 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+
+#include "../test-skeleton.c"
+
+static int dir_fd;
+
+static void
+prepare (void)
+{
+  size_t test_dir_len = strlen (test_dir);
+  static const char dir_name[] = "/tst-unlinkat.XXXXXX";
+
+  size_t dirbuflen = test_dir_len + sizeof (dir_name);
+  char *dirbuf = malloc (dirbuflen);
+  if (dirbuf == NULL)
+    {
+      puts ("out of memory");
+      exit (1);
+    }
+
+  snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
+  if (mkdtemp (dirbuf) == NULL)
+    {
+      puts ("cannot create temporary directory");
+      exit (1);
+    }
+
+  add_temp_file (dirbuf);
+
+  dir_fd = open (dirbuf, O_RDONLY | O_DIRECTORY);
+  if (dir_fd == -1)
+    {
+      puts ("cannot open directory");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  /* fdopendir takes over the descriptor, make a copy.  */
+  int dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("1st lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  DIR *dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("fdopendir failed");
+      return 1;
+    }
+  struct dirent64 *d;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	printf ("temp directory contains file \"%s\"\n", d->d_name);
+	return 1;
+      }
+  closedir (dir);
+
+  /* Try to create a file.  */
+  int fd = openat (dir_fd, "some-file", O_CREAT|O_RDWR|O_EXCL, 0666);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  puts ("*at functions not supported");
+	  return 0;
+	}
+
+      puts ("file creation failed");
+      return 1;
+    }
+  write (fd, "hello", 5);
+  close (fd);
+  puts ("file created");
+
+  /* fdopendir takes over the descriptor, make a copy.  */
+  dupfd = dup (dir_fd);
+  if (dupfd == -1)
+    {
+      puts ("2nd dup failed");
+      return 1;
+    }
+  if (lseek (dupfd, 0, SEEK_SET) != 0)
+    {
+      puts ("2nd lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  dir = fdopendir (dupfd);
+  if (dir == NULL)
+    {
+      puts ("2nd fdopendir failed");
+      return 1;
+    }
+  bool seen_file = false;
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	if (strcmp (d->d_name, "some-file") != 0)
+	  {
+	    printf ("temp directory contains file \"%s\"\n", d->d_name);
+	    return 1;
+	  }
+
+	seen_file = true;
+      }
+  closedir (dir);
+
+  if (!seen_file)
+    {
+      puts ("file not created in correct directory");
+      return 1;
+    }
+
+  /* Remove the file now.  */
+  if (unlinkat (dir_fd, "some-file", 0) != 0)
+    {
+      puts ("unlinkat failed");
+      return 1;
+    }
+
+  /* We won't need dir_fd anymore after this, so use it.  */
+  if (lseek (dir_fd, 0, SEEK_SET) != 0)
+    {
+      puts ("3rd lseek failed");
+      return 1;
+    }
+
+  /* The directory should be empty safe the . and .. files.  */
+  dir = fdopendir (dir_fd);
+  if (dir == NULL)
+    {
+      puts ("3rd fdopendir failed");
+      return 1;
+    }
+  while ((d = readdir64 (dir)) != NULL)
+    if (strcmp (d->d_name, ".") != 0 && strcmp (d->d_name, "..") != 0)
+      {
+	if (strcmp (d->d_name, "some-file") == 0)
+	  {
+	    puts ("some-file not removed");
+	    return 1;
+	  }
+	else
+	  {
+	    printf ("temp directory contains file \"%s\"\n", d->d_name);
+	    return 1;
+	  }
+      }
+  closedir (dir);
+
+  return 0;
+}