implementing mkdir, chdir, mv, pwd inside a shell !

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Homework and Emergencies Homework & Coursework Questions implementing mkdir, chdir, mv, pwd inside a shell !
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Old 11-03-2009
CPU & Memory implementing mkdir, chdir, mv, pwd inside a shell !

1. The problem statement, all variables and given/known data:

need to implement mkdir, chdir, mv, pwd

given a shell.cpp directory.cpp and some other files

this shell missing these commands, and i need to implement them inside the shell

2. Relevant commands, code, scripts, algorithms:

shell included in this file:

3. The attempts at a solution (include all code and scripts):

the mkdir is not working from inside the shell. neither chdir , mv or pwd.

i successfuly implemented piping ,redirection, execution in the background in earlie assigment, but this assigment is not working out

4. School (University) and Course Number:

CEG433/CEG633 - Operating Systems
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pwd(1)							      General Commands Manual							    pwd(1)

pwd - Displays the pathname of the current working directory SYNOPSIS
Interfaces documented on this reference page conform to industry standards as follows: pwd: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
The pwd command writes to standard output the full pathname of your current working directory. All directories are separated by a / (slash). The first / represents the root directory and the last directory named is your current working directory. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. ENVIRONMENT VARIABLES
The following environment variables affect the execution of pwd: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the format and contents of diagnostic mes- sages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: cd(1), csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: stat(2), getcwd(3) Standards: standards(5) pwd(1)