static SftpATTRS getATTR(Buffer buf){
    SftpATTRS attr=new SftpATTRS();	
    attr.flags=buf.getInt();
    if((attr.flags&SSH_FILEXFER_ATTR_SIZE)!=0){ attr.size=buf.getLong(); }
    if((attr.flags&SSH_FILEXFER_ATTR_UIDGID)!=0){
      attr.uid=buf.getInt(); attr.gid=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_PERMISSIONS)!=0){ 
      attr.permissions=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ 
      attr.atime=buf.getInt();
    }
    if((attr.flags&SSH_FILEXFER_ATTR_ACMODTIME)!=0){ 
      attr.mtime=buf.getInt(); 
    }
    if((attr.flags&SSH_FILEXFER_ATTR_EXTENDED)!=0){
      int count=buf.getInt();
      if(count>0){
	attr.extended=new String[count*2];
	for(int i=0; i<count; i++){
	  attr.extended[i*2]=Util.byte2str(buf.getString());
	  attr.extended[i*2+1]=Util.byte2str(buf.getString());
	}
      }
    }
    return attr;
  }