sysdeps/unix/sysv/linux/fxstatat64.c

   1 /* fxstatat64 used on fstatat64, 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 #define __fxstatat __redirect___fxstatat
  20 #include <sys/stat.h>
  21 #undef __fxstatat
  22 #include <fcntl.h>
  23 #include <kernel_stat.h>
  24 #include <sysdep.h>
  25 #include <xstatconv.h>
  26 #include <statx_cp.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
  33 int
  34 __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
  35 {
  36 #if XSTAT_IS_XSTAT64
  37 # ifdef __NR_newfstatat
  38   /* 64-bit kABI, e.g. aarch64, powerpc64*, s390x, riscv64, and
  39      x86_64.  */
  40   if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)
  41     return INLINE_SYSCALL_CALL (newfstatat, fd, file, st, flag);
  42 # elif defined __NR_fstatat64
  43   /* 64-bit kABI outlier, e.g. sparc64.  */
  44   struct stat64 st64;
  45   int r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
  46   return r ?: __xstat32_conv (vers, &st64, (struct stat *) st);
  47 # else
  48   /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc, riscv32.  */
  49   if (vers == _STAT_VER_KERNEL)
  50     {
  51       struct statx tmp;
  52       int r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
  53                                    STATX_BASIC_STATS, &tmp);
  54       if (r == 0)
  55         __cp_stat64_statx (st, &tmp);
  56       return r;
  57     }
  58 # endif
  59 #else
  60   /* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa, m68k,
  61      microblaze, mips32, nios2, sh, powerpc32, and sparc32.  */
  62   if (vers == _STAT_VER_LINUX)
  63     return INLINE_SYSCALL_CALL (fstatat64, fd, file, st, flag);
  64 #endif
  65   return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  66 }
  67
  68 #if XSTAT_IS_XSTAT64
  69 strong_alias (__fxstatat64, __fxstatat)
  70 #endif
  71
  72 #endif /* LIB_COMPAT(libc, GLIBC_2_4, GLIBC_2_33)  */