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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/maccess.h>

#include <fs/fcntl.h>

#include "file.h"

#include "inode.h"

#include "dentry.h"

#include "super.h"

#include "fileop.h"

#include "dentryop.h"

#include "inodeop.h"

#include "fsconst.h"

#include "fs.h"

#include "debug.h"

int k_unlink(char *upathname)

{

  declare_buffer(char,pathname,MAXPATHNAME);

  struct dentry *d;

  int createflag;

  __pid_t pid;

  int len,res;

  call_to_fs();

  printkd("k_unlink: START");

  pid=__get_pid();

  len=__verify_read_nolen((char*)upathname);

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

  __copy_from_user(pathname,upathname,len+1);

  printkd("k_unlink: pathname copied");

  createflag=DENTRY_NOCREATE;

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

  printkd("k_unlink: dentry found");

  if (d==NULL) return_from_fs(-ENOENT);

  if (__S_ISDIR(d->d_inode->i_st.st_mode)) return_from_fs(-EPERM);

  if (!(d->d_sb->sb_mopts.flags&MOUNT_FLAG_RW)) return_from_fs(-EROFS);

  printkd("k_unlink: dentry is ok");

  res=unlink_dentry(d);

  printkd("k_unlink: dentry unlinked");

  printkd("k_unlink: END");

  return_from_fs(res);

}