sysdeps/unix/sysv/linux/fstat64.c

   1 /* Get file status.  Linux version.
   2    Copyright (C) 2020-2024 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 __fstat __redirect___fstat
  20 #define fstat   __redirect_fstat
  21 #include <sys/stat.h>
  22 #undef __fstat
  23 #undef fstat
  24 #include <fcntl.h>
  25 #include <internal-stat.h>
  26 #include <errno.h>
  27
  28 int
  29 __fstat64_time64 (int fd, struct __stat64_t64 *buf)
  30 {
  31 #if !FSTATAT_USE_STATX
  32 # if XSTAT_IS_XSTAT64
  33 #  ifdef __NR_fstat
  34   /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
  35      x86_64.  */
  36   return INLINE_SYSCALL_CALL (fstat, fd, buf);
  37 #  elif defined __NR_fstat64
  38 #   if STAT64_IS_KERNEL_STAT64
  39   /* 64-bit kABI outlier, e.g. alpha  */
  40   return INLINE_SYSCALL_CALL (fstat64, fd, buf);
  41 #   else
  42   /* 64-bit kABI outlier, e.g. sparc64.  */
  43   struct kernel_stat64 kst64;
  44   int r = INLINE_SYSCALL_CALL (fstat64, fd, &kst64);
  45   if (r == 0)
  46     __cp_stat64_kstat64 (buf, &kst64);
  47   return r;
  48 #   endif /* STAT64_IS_KERNEL_STAT64 */
  49 #  endif
  50 # else /* XSTAT_IS_XSTAT64 */
  51   /* 64-bit kabi outlier, e.g. mips64 and mips64-n32.  */
  52   struct kernel_stat kst;
  53   int r = INLINE_SYSCALL_CALL (fstat, fd, &kst);
  54   if (r == 0)
  55     __cp_kstat_stat64_t64 (&kst, buf);
  56   return r;
  57 # endif
  58 #else /* !FSTATAT_USE_STATX  */
  59   /* All kABIs with non-LFS support and with old 32-bit time_t support
  60      e.g. arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32,
  61      and sparc32.  */
  62   if (fd < 0)
  63     {
  64       __set_errno (EBADF);
  65       return -1;
  66     }
  67   return __fstatat64_time64 (fd, "", buf, AT_EMPTY_PATH);
  68 #endif
  69 }
  70 #if __TIMESIZE != 64
  71 hidden_def (__fstat64_time64)
  72
  73 int
  74 __fstat64 (int fd, struct stat64 *buf)
  75 {
  76   if (fd < 0)
  77     {
  78       __set_errno (EBADF);
  79       return -1;
  80     }
  81
  82   struct __stat64_t64 st_t64;
  83   return __fstat64_time64 (fd, &st_t64)
  84          ?: __cp_stat64_t64_stat64 (&st_t64, buf);
  85 }
  86 #endif
  87
  88 #undef __fstat
  89 #undef fstat
  90
  91 hidden_def (__fstat64)
  92 weak_alias (__fstat64, fstat64)
  93
  94 #if XSTAT_IS_XSTAT64
  95 strong_alias (__fstat64, __fstat)
  96 weak_alias (__fstat64, fstat)
  97 #endif