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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:
http://avida.cs.wright.edu/courses/C...Winter.tar.bz2


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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LEARN ABOUT SUNOS

pwd

pwd(1)								   User Commands							    pwd(1)

NAME

       pwd - return working directory name

SYNOPSIS

       /usr/bin/pwd

DESCRIPTION

       The pwd utility writes an absolute path name of the current working directory to standard output.

       Both the Bourne shell, sh(1), and the Korn shell, ksh(1), also have a built-in pwd command.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions  of the following environment variables that affect the execution of pwd: LANG, LC_ALL, LC_MESSAGES, and
       NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

       If an error is detected, output will not be written to standard output, a diagnostic message will be written to	standard  error,  and  the
       exit status will not be	0.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cd(1), ksh(1), sh(1), shell_builtins(1), attributes(5), environ(5), standards(5)

DIAGNOSTICS

       ``Cannot open ..'' and ``Read error in ..'' indicate possible file system trouble and should be referred to a UNIX system administrator.

NOTES

       If  you move the current directory or one above it,  pwd may not give the correct response. Use the  cd(1) command with a full path name to
       correct this situation.

SunOS 5.10							    28 Mar 1995 							    pwd(1)