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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 NETBSD

pwd

PWD(1)							    BSD General Commands Manual 						    PWD(1)

NAME

     pwd -- return working directory name

SYNOPSIS

     pwd [-LP]

DESCRIPTION

     pwd writes the absolute pathname of the current working directory to the standard output.

     The following options are available:

     -L      If the PWD environment variable is an absolute pathname that contains neither "/./" nor "/../" and references the current directory,
	     then PWD is assumed to be the name of the current directory.

     -P      Print the physical path to the current working directory, with symbolic links in the path resolved.

     The default for the pwd command is -P.

     pwd is usually provided as a shell builtin (which may have a different default).

EXIT STATUS

     The pwd utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     cd(1), csh(1), ksh(1), sh(1), getcwd(3)

STANDARDS

     The pwd utility is expected to be conforming to IEEE Std 1003.1 (``POSIX.1''), except that the default is -P not -L.

BUGS

     In csh(1) the command dirs is always faster (although it can give a different answer in the rare case that the current directory or a con-
     taining directory was moved after the shell descended into it).

     pwd -L relies on the file system having unique inode numbers.  If this is not true (e.g., on FAT file systems) then pwd -L may fail to detect
     that PWD is incorrect.

BSD
								 October 30, 2003							       BSD