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/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#include <fs/types.h>

#include <fs/errno.h>

#include <fs/task.h>

#include <fs/util.h>

#include <fs/maccess.h>

#include "file.h"

#include "dentry.h"

#include "fs.h"

int k_chdir(char *newpath)

{

  declare_buffer(char,pathname,MAXPATHNAME);  

  int createflag=DENTRY_NOCREATE;

  struct dentry *d;

  __pid_t pid;

  int len;

  call_to_fs();

  len=__verify_read_nolen((char*)newpath);

  if ((!len)||(len>MAXPATHNAMELEN)) return_from_fs(-EVERIFY);

  __copy_from_user(pathname,newpath,len+1);

  pid=__get_pid();  

  lock_desctable(pid);

  d=find_dentry_from_ext(cwden_ptr(pid),(char *)pathname,&createflag);

  if (d==NULL) {

    unlock_desctable(pid);

    return_from_fs(-ENOENT);

  }

  unlock_dentry(cwden_ptr(pid));

  /* dovrebbe essere: cwden_ptr(pid)=d; */

  desctable[pid].fd_cwden=d;

  strcpy(cwd_ptr(pid),pathname);

  unlock_desctable(pid);

  return_from_fs(EOK);

}