glibc/sysdeps/unix/sysv/linux/lxstat64.c

/* lxstat64 using Linux lstat64 system call.
   Copyright (C) 1991-2020 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
   <https://www.gnu.org/licenses/>.  */

#define __lxstat __redirect___lxstat
#include <sys/stat.h>
#undef __lxstat
#include <fcntl.h>
#include <kernel_stat.h>
#include <sysdep.h>
#include <xstatconv.h>
#include <statx_cp.h>

/* Get information about the file NAME in BUF.  */

int
___lxstat64 (int vers, const char *name, struct stat64 *buf)
{
#if XSTAT_IS_XSTAT64
# ifdef __NR_lstat64
  /* 64-bit kABI outlier, e.g. sparc64.  */
  if (vers == _STAT_VER_KERNEL)
    return INLINE_SYSCALL_CALL (lstat, name, buf);
  else
    {
      struct stat64 st64;
      int r = INLINE_SYSCALL_CALL (lstat64, name, &st64);
      return r ?: __xstat32_conv (vers, &st64, (struct stat *) buf);
    }
# elif defined __NR_lstat
  /* Old 64-bit kABI, e.g. ia64, powerpc64*, s390x, and x86_64.  */
  if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)
    return INLINE_SYSCALL_CALL (lstat, name, buf);
# elif defined __NR_newfstatat
  /* New kABIs which uses generic 64-bit Linux ABI, e.g. aarch64, riscv64.  */
  if (vers == _STAT_VER_KERNEL)
    return INLINE_SYSCALL_CALL (newfstatat, AT_FDCWD, name, buf,
				AT_SYMLINK_NOFOLLOW);
# else
  /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc, riscv32.  */
  if (vers == _STAT_VER_KERNEL)
    {
      struct statx tmp;
      int r = INLINE_SYSCALL_CALL (statx, AT_FDCWD, name,
				   AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
				   STATX_BASIC_STATS, &tmp);
      if (r == 0)
	__cp_stat64_statx (buf, &tmp);
      return r;
     }
# endif
#else
# if STAT_IS_KERNEL_STAT
  /* New kABIs which uses generic pre 64-bit time Linux ABI,
     e.g. csky, nios2  */
  if (vers == _STAT_VER_KERNEL)
    return INLINE_SYSCALL_CALL (fstatat64, AT_FDCWD, name, buf,
				AT_SYMLINK_NOFOLLOW);
# else
  /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k,
     microblaze, s390, sh, mips32, powerpc32, and sparc32.  */
  return INLINE_SYSCALL_CALL (lstat64, name, buf);
# endif /* STAT_IS_KERNEL_STAT  */
#endif /* XSTAT_IS_XSTAT64  */

  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
}

#if XSTAT_IS_XSTAT64
weak_alias (___lxstat64, __lxstat);
weak_alias (___lxstat64, __GI___lxstat);
#endif

#include <shlib-compat.h>

#if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
versioned_symbol (libc, ___lxstat64, __lxstat64, GLIBC_2_2);
strong_alias (___lxstat64, __old__lxstat64)
compat_symbol (libc, __old__lxstat64, __lxstat64, GLIBC_2_1);
hidden_ver (___lxstat64, __lxstat64)
#else
strong_alias (___lxstat64, __lxstat64);
hidden_def (__lxstat64)
#endif