* 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.

1 files changed, 148 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/fxstatat.c b/sysdeps/unix/sysv/linux/i386/fxstatat.c
new file mode 100644
index 0000000000..2fc89e69c4
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/fxstatat.c
@@ -0,0 +1,148 @@
+/* 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.
+
+   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.  */
+
+/* Ho hum, if fxstatat == fxstatat64 we must get rid of the prototype or gcc
+   will complain since they don't strictly match.  */
+#define __fxstatat64 __fxstatat64_disable
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <kernel_stat.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+#include <bp-checks.h>
+
+#include "kernel-features.h"
+
+#include <xstatconv.h>
+
+#ifdef __NR_stat64
+# if __ASSUME_STAT64_SYSCALL == 0
+/* The variable is shared between all wrappers around *stat64 calls.  */
+extern int __have_no_stat64;
+# endif
+#endif
+
+
+/* Get information about the file NAME relative to FD in ST.  */
+int
+__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
+{
+  if (flag & ~AT_SYMLINK_NOFOLLOW)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  char *buf = NULL;
+
+  if (fd != AT_FDCWD && file[0] != '/')
+    {
+      size_t filelen = strlen (file);
+      static const char procfd[] = "/proc/self/fd/%d/%s";
+      /* Buffer for the path name we are going to use.  It consists of
+	 - the string /proc/self/fd/
+	 - the file descriptor number
+	 - the file name provided.
+	 The final NUL is included in the sizeof.   A bit of overhead
+	 due to the format elements compensates for possible negative
+	 numbers.  */
+      size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
+      buf = alloca (buflen);
+
+      __snprintf (buf, buflen, procfd, fd, file);
+      file = buf;
+    }
+
+#if __ASSUME_STAT64_SYSCALL == 0
+  struct kernel_stat kst;
+#endif
+  int result;
+  INTERNAL_SYSCALL_DECL (err);
+
+  if (vers == _STAT_VER_KERNEL)
+    {
+      if (flag & AT_SYMLINK_NOFOLLOW)
+	result = INTERNAL_SYSCALL (lstat, err, 2, CHECK_STRING (file),
+				   CHECK_1 ((struct kernel_stat *) st));
+      else
+	result = INTERNAL_SYSCALL (stat, err, 2, CHECK_STRING (file),
+				   CHECK_1 ((struct kernel_stat *) st));
+      goto out;
+    }
+
+#if __ASSUME_STAT64_SYSCALL > 0
+  struct stat64 st64;
+
+  if (flag & AT_SYMLINK_NOFOLLOW)
+    result = INTERNAL_SYSCALL (lstat64, err, 2, CHECK_STRING (file),
+			       __ptrvalue (&st64));
+  else
+    result = INTERNAL_SYSCALL (stat64, err, 2, CHECK_STRING (file),
+			       __ptrvalue (&st64));
+  if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
+    return __xstat32_conv (vers, &st64, st);
+#else
+# if defined __NR_stat64
+  /* To support 32 bit UIDs, we have to use stat64.  The normal stat
+     call only returns 16 bit UIDs.  */
+  if (! __have_no_stat64)
+    {
+      struct stat64 st64;
+
+      if (flag & AT_SYMLINK_NOFOLLOW)
+	result = INTERNAL_SYSCALL (lstat64, err, 2, CHECK_STRING (file),
+				   __ptrvalue (&st64));
+      else
+	result = INTERNAL_SYSCALL (stat64, err, 2, CHECK_STRING (file),
+				   __ptrvalue (&st64));
+
+      if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
+	result = __xstat32_conv (vers, &st64, st);
+
+      if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1)
+	  || INTERNAL_SYSCALL_ERRNO (result, err) != ENOSYS)
+	goto out;
+
+      __have_no_stat64 = 1;
+    }
+# endif
+  if (flag & AT_SYMLINK_NOFOLLOW)
+    result = INTERNAL_SYSCALL (lstat, err, 2, CHECK_STRING (file),
+			       __ptrvalue (&kst));
+  else
+    result = INTERNAL_SYSCALL (stat, err, 2, CHECK_STRING (file),
+			       __ptrvalue (&kst));
+  if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
+    return __xstat_conv (vers, &kst, st);
+#endif  /* __ASSUME_STAT64_SYSCALL  */
+
+ out:
+  if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
+    __atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
+
+  return result;
+}
+#ifdef XSTAT_IS_XSTAT64
+# undef __fxstatat64
+strong_alias (__fxstatat, __fxstatat64);
+#endif