sysdeps/unix/sysv/linux/sparc/sparc64/xstatconv.c

   1 /* Convert between the kernel's `struct stat' format, and libc's.
   2    Copyright (C) 1991-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21 #include <sys/stat.h>
  22 #include <kernel_stat.h>
  23 #include <string.h>
  24
  25 int
  26 __xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
  27 {
  28   switch (vers)
  29     {
  30     case _STAT_VER_KERNEL:
  31       /* Nothing to do.  The struct is in the form the kernel expects.
  32          We should have short-circuted before we got here, but for
  33          completeness... */
  34       *(struct kernel_stat *) ubuf = *kbuf;
  35       break;
  36
  37     case _STAT_VER_LINUX:
  38       {
  39         struct stat *buf = ubuf;
  40
  41         /* Convert to current kernel version of `struct stat'.  */
  42         buf->st_dev = kbuf->st_dev;
  43         buf->__pad1 = 0;
  44         buf->st_ino = kbuf->st_ino;
  45         buf->st_mode = kbuf->st_mode;
  46         buf->st_nlink = kbuf->st_nlink;
  47         buf->st_uid = kbuf->st_uid;
  48         buf->st_gid = kbuf->st_gid;
  49         buf->st_rdev = kbuf->st_rdev;
  50         buf->__pad2 = 0;
  51         buf->st_size = kbuf->st_size;
  52         buf->st_blksize = kbuf->st_blksize;
  53         buf->st_blocks = kbuf->st_blocks;
  54         buf->st_atim.tv_sec = kbuf->st_atime_sec;
  55         buf->st_atim.tv_nsec = 0;
  56         buf->st_mtim.tv_sec = kbuf->st_mtime_sec;
  57         buf->st_mtim.tv_nsec = 0;
  58         buf->st_ctim.tv_sec = kbuf->st_ctime_sec;
  59         buf->st_ctim.tv_nsec = 0;
  60         buf->__glibc_reserved4 = 0;
  61         buf->__glibc_reserved5 = 0;
  62       }
  63       break;
  64
  65     default:
  66       __set_errno (EINVAL);
  67       return -1;
  68     }
  69
  70   return 0;
  71 }
  72
  73 int
  74 __xstat32_conv (int vers, struct stat64 *sbuf, struct stat *buf)
  75 {
  76   struct kernel_stat64 *kbuf;
  77
  78   /* *stat64 syscalls on sparc64 really fill in struct kernel_stat64,
  79      rather than struct stat64.  But it is the same size as
  80      struct kernel_stat64, so use this hack so that we can reuse
  81      i386 {,f,l}xstat{,at}.c routines.  */
  82   __asm ("" : "=r" (kbuf) : "0" (sbuf));
  83   assert (sizeof (struct stat) == sizeof (struct stat64));
  84   assert (sizeof (struct stat64) >= sizeof (struct kernel_stat64));
  85
  86   switch (vers)
  87     {
  88     case _STAT_VER_LINUX:
  89       {
  90         /* Convert current kernel version of `struct stat64' to
  91            `struct stat'.  */
  92         buf->st_dev = kbuf->st_dev;
  93         buf->__pad1 = 0;
  94         buf->st_ino = kbuf->st_ino;
  95         buf->st_mode = kbuf->st_mode;
  96         buf->st_nlink = kbuf->st_nlink;
  97         buf->st_uid = kbuf->st_uid;
  98         buf->st_gid = kbuf->st_gid;
  99         buf->st_rdev = kbuf->st_rdev;
 100         buf->__pad2 = 0;
 101         buf->st_size = kbuf->st_size;
 102         buf->st_blksize = kbuf->st_blksize;
 103         buf->st_blocks = kbuf->st_blocks;
 104         buf->st_atim.tv_sec = kbuf->st_atime_sec;
 105         buf->st_atim.tv_nsec = kbuf->st_atime_nsec;
 106         buf->st_mtim.tv_sec = kbuf->st_mtime_sec;
 107         buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec;
 108         buf->st_ctim.tv_sec = kbuf->st_ctime_sec;
 109         buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec;
 110         buf->__glibc_reserved4 = 0;
 111         buf->__glibc_reserved5 = 0;
 112       }
 113       break;
 114
 115       /* If struct stat64 is different from struct stat then
 116          _STAT_VER_KERNEL does not make sense.  */
 117     case _STAT_VER_KERNEL:
 118     default:
 119       __set_errno (EINVAL);
 120       return -1;
 121     }
 122
 123   return 0;
 124 }