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#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);
}