sysdeps/unix/sysv/linux/lxstat64.c

   1 /* lxstat64 using Linux lstat64 system call.
   2    Copyright (C) 1991-2024 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 __lxstat __redirect___lxstat
  20 #include <sys/stat.h>
  21 #undef __lxstat
  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_1, GLIBC_2_33)
  30
  31 /* Get information about the file NAME in BUF.  */
  32
  33 int
  34 ___lxstat64 (int vers, const char *name, struct stat64 *buf)
  35 {
  36 #if XSTAT_IS_XSTAT64
  37 # ifdef __NR_lstat64
  38   /* 64-bit kABI outlier, e.g. sparc64.  */
  39   if (vers == _STAT_VER_KERNEL)
  40     return INLINE_SYSCALL_CALL (lstat, name, buf);
  41   else
  42     {
  43       struct stat64 st64;
  44       int r = INLINE_SYSCALL_CALL (lstat64, name, &st64);
  45       return r ?: __xstat32_conv (vers, &st64, (struct stat *) buf);
  46     }
  47 # elif defined __NR_lstat
  48   /* Old 64-bit kABI, e.g. powerpc64*, s390x, and x86_64.  */
  49   if (vers == _STAT_VER_KERNEL || vers == _STAT_VER_LINUX)
  50     return INLINE_SYSCALL_CALL (lstat, name, buf);
  51 # elif defined __NR_newfstatat
  52   /* New kABIs which uses generic 64-bit Linux ABI, e.g. aarch64, riscv64.  */
  53   if (vers == _STAT_VER_KERNEL)
  54     return INLINE_SYSCALL_CALL (newfstatat, AT_FDCWD, name, buf,
  55                                 AT_SYMLINK_NOFOLLOW);
  56 # else
  57   /* New 32-bit kABIs with only 64-bit time_t support, e.g. arc, riscv32.  */
  58   if (vers == _STAT_VER_KERNEL)
  59     {
  60       struct statx tmp;
  61       int r = INLINE_SYSCALL_CALL (statx, AT_FDCWD, name,
  62                                    AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
  63                                    STATX_BASIC_STATS, &tmp);
  64       if (r == 0)
  65         __cp_stat64_statx (buf, &tmp);
  66       return r;
  67      }
  68 # endif
  69 #else
  70 # if STAT_IS_KERNEL_STAT
  71   /* New kABIs which uses generic pre 64-bit time Linux ABI,
  72      e.g. csky, nios2  */
  73   if (vers == _STAT_VER_KERNEL)
  74     return INLINE_SYSCALL_CALL (fstatat64, AT_FDCWD, name, buf,
  75                                 AT_SYMLINK_NOFOLLOW);
  76 # else
  77   /* Old kABIs with old non-LFS support, e.g. arm, i386, hppa, m68k,
  78      microblaze, s390, sh, mips32, powerpc32, and sparc32.  */
  79   return INLINE_SYSCALL_CALL (lstat64, name, buf);
  80 # endif /* STAT_IS_KERNEL_STAT  */
  81 #endif /* XSTAT_IS_XSTAT64  */
  82
  83   return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  84 }
  85
  86 #if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
  87 versioned_symbol (libc, ___lxstat64, __lxstat64, GLIBC_2_2);
  88 strong_alias (___lxstat64, __old__lxstat64)
  89 compat_symbol (libc, __old__lxstat64, __lxstat64, GLIBC_2_1);
  90 #else
  91 strong_alias (___lxstat64, __lxstat64);
  92 #endif
  93
  94 #if XSTAT_IS_XSTAT64
  95 strong_alias (___lxstat64,__lxstat)
  96 #endif
  97
  98 #endif /* LIB_COMPAT  */