proc = new Private_Execute();
proc.setCommand(command);
proc.setPWD(pwd);
proc.popen();
External_File eofile = new External_File();
eofile.setInputStream(proc.getStdOut());
stdout=create_File_adp(eofile);
External_File eefile = new External_File();
eefile.setInputStream(proc.getStdErr());
stderr=create_File_adp(eefile);
External_File eifile = new External_File();
eifile.setOutputStream(proc.getStdIn());
stdin=create_File_adp(eifile);
return null;
}