sysdeps/unix/sysv/linux/fxstatat.c

   1 /* fxstatat used on fstatat, Linux implementation.
   2    Copyright (C) 2005-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/stat.h>
  20 #include <fcntl.h>
  21 #include <kernel_stat.h>
  22 #include <sysdep.h>
  23
  24 #if !XSTAT_IS_XSTAT64
  25 # include <xstatconv.h>
  26 # include <xstatover.h>
  27 # include <shlib-compat.h>
  28
  29 # if LIB_COMPAT(libc, GLIBC_2_4, GLIBC_2_33)
  30
  31 /* Get information about the file FD in BUF.  */
  32 int
  33 __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
  34 {
  35 #if STAT_IS_KERNEL_STAT
  36   /* New kABIs which uses generic pre 64-bit time Linux ABI, e.g.
  37      csky, nios2  */
  38   if (vers == _STAT_VER_KERNEL)
  39     {
  40       int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);
  41       return r ?: stat_overflow (st);
  42     }
  43   return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  44 #else
  45   /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k, mips32,
  46      microblaze, s390, sh, powerpc32, and sparc32.  */
  47   struct stat64 st64;
  48   int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
  49   return r ?: __xstat32_conv (vers, &st64, st);
  50 #endif
  51 }
  52
  53 # endif /* LIB_COMPAT  */
  54
  55 #endif /* XSTAT_IS_XSTAT64  */