sysdeps/unix/sysv/linux/fxstat.c

   1 /* fxstat using old-style Unix fstat system call.
   2    Copyright (C) 1991-2021 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 SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_33)
  30
  31 /* Get information about the file FD in BUF.  */
  32 int
  33 __fxstat (int vers, int fd, struct stat *buf)
  34 {
  35   switch (vers)
  36     {
  37     case _STAT_VER_KERNEL:
  38       {
  39 # if STAT_IS_KERNEL_STAT
  40         /* New kABIs which uses generic pre 64-bit time Linux ABI,
  41            e.g. csky, nios2  */
  42         int r = INLINE_SYSCALL_CALL (fstat64, fd, buf);
  43         return r ?: stat_overflow (buf);
  44 # else
  45         /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k,
  46            microblaze, s390, sh, powerpc, and sparc.  */
  47         return INLINE_SYSCALL_CALL (fstat, fd, buf);
  48 # endif
  49       }
  50
  51     default:
  52       {
  53 # if STAT_IS_KERNEL_STAT
  54         return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  55 # else
  56         struct stat64 buf64;
  57         int r = INLINE_SYSCALL_CALL (fstat64, fd, &buf64);
  58         return r ?: __xstat32_conv (vers, &buf64, buf);
  59 #endif
  60       }
  61     }
  62 }
  63
  64 # endif /* SHLIB_COMPAT  */
  65
  66 #endif /* XSTAT_IS_XSTAT64  */