sysdeps/unix/sysv/linux/fxstat64.c

   1 /* fxstat64 using Linux fstat64/statx system call.
   2    Copyright (C) 1997-2024 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 __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, 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  */