stat.c

上一个上传的有问题,这个是好的。visopsys包括系统内核和GUI的全部SOURCE code ,还包括一些基本的docs文档。里面src子目录对应所有SOURCE code.对于想研究操作系统的朋

// 
//  Visopsys
//  Copyright (C) 1998-2007 J. Andrew McLaughlin
//  
//  This library is free software; you can redistribute it and/or modify it
//  under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation; either version 2.1 of the License, or (at
//  your option) any later version.
//
//  This library is distributed in the hope that it will be useful, but
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
//  General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public License
//  along with this library; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
//  stat.c
//

// This is the standard "stat" function, as found in standard C libraries

#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/api.h>


int stat(const char *fileName, struct stat *buf)
{
  // Returns information about the specified file

  int status = 0;
  file theFile;
  disk theDisk;

  if (visopsys_in_kernel)
    return (errno = ERR_BUG);

  // Try to find the file
  bzero(&theFile, sizeof(file));
  status = fileFind(fileName, &theFile);
  if (status < 0)
    {
      errno = status;
      return (-1);
    }

  // Get the disk
  bzero(&theDisk, sizeof(disk));
  status = fileGetDisk(fileName, &theDisk);
  if (status < 0)
    {
      errno = status;
      return (-1);
    }

  buf->st_dev = theDisk.deviceNumber;
  buf->st_ino = 1;      // bogus
  buf->st_mode = 0;     // bogus
  buf->st_nlink = 1;    // bogus
  buf->st_uid = 1;      // bogus
  buf->st_gid = 1;      // bogus
  buf->st_rdev = 0;     // bogus
  buf->st_size = theFile.size;
  buf->st_blksize = theFile.blockSize;
  buf->st_blocks = theFile.blocks;
  buf->st_atime = theFile.accessedDate;
  buf->st_mtime = theFile.modifiedDate;
  buf->st_ctime = theFile.creationDate;

  return (0);
}