1  /* fxstat64 using Linux fstat64/statx system call.
       2     Copyright (C) 1997-2023 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 __fxstat __redirect___fxstat
      20  #include <sys/stat.h>
      21  #undef __fxstat
      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_0, GLIBC_2_33)
      30  
      31  /* Get information about the file FD in BUF.  */
      32  
      33  int
      34  ___fxstat64 (int vers, int fd, struct stat64 *buf)
      35  {
      36  #if XSTAT_IS_XSTAT64
      37  # ifdef __NR_fstat64
      38    /* 64-bit kABI outlier, e.g. sparc64.  */
      39    if (vers == _STAT_VER_KERNEL)
      40      return INLINE_SYSCALL_CALL (fstat, fd, buf);
      41    else
      42      {
      43        struct stat64 st64;
      44        int r = INLINE_SYSCALL_CALL (fstat64, fd, &st64);
      45        return r ?: __xstat32_conv (vers, &st64, (struct stat *) buf);
      46      }
      47  # elif defined __NR_fstat
      48    /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64,
      49       and x86_64.  */
      50    if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)
      51      return INLINE_SYSCALL_CALL (fstat, fd, buf);
      52    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
      53  # else
      54    /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc, riscv32.  */
      55    struct statx tmp;
      56    int r = INLINE_SYSCALL_CALL (statx, fd, "", AT_EMPTY_PATH,
      57  			       STATX_BASIC_STATS, &tmp);
      58    if (r == 0)
      59      __cp_stat64_statx (buf, &tmp);
      60    return r;
      61  # endif
      62  #else
      63    /* All kABIs with non-LFS support, e.g. arm, csky, i386, hppa, m68k,
      64       microblaze, mips32, nios2, sh, powerpc32, and sparc32.  */
      65    return INLINE_SYSCALL_CALL (fstat64, fd, buf);
      66  #endif /* XSTAT_IS_XSTAT64  */
      67  }
      68  
      69  #if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
      70  versioned_symbol (libc, ___fxstat64, __fxstat64, GLIBC_2_2);
      71  strong_alias (___fxstat64, __old__fxstat64)
      72  compat_symbol (libc, __old__fxstat64, __fxstat64, GLIBC_2_1);
      73  #else
      74  strong_alias (___fxstat64, __fxstat64)
      75  #endif
      76  
      77  #if XSTAT_IS_XSTAT64
      78  strong_alias (___fxstat64, __fxstat)
      79  #endif
      80  
      81  #endif /* LIB_COMPAT  */