Commend Line Interpreter

I need a short c++ code which do the following things in linux commend line.

DO NOT use system() or execl(), execvp() except run comment

**whereami** Display current working directory.

**listall** Display a complete list of files and directories in current directory.

**filelist** Display regular files in current directory.

**dirlist** Display directories in current directory.

**xlist** Display executable files in current directory.

**run** Execute an external program such as ls, echo, firefox, etc.

**chdir** Change the working directory of your program.

**info** Display information such as name, type, size, permissions of a given file.

**show** Display contents of a given file.

**mode** Change permissions of a given file.

Softwarearchitektur

Projekt-ID: #2668152

Über das Projekt