can someone help me implement $"$fs$\_$setcwd" please i have the mfs$.$h file based on that please implement $"$fs$\_$setcwd". #ifndef $\_$MFS$\_$H

#define $\_$MFS$\_$H

#include

#include

#include

#include $"$b$\_$io$.$h$"$

#include "directoryEntry.h$"$

#include

#define FT$\_$REGFILE DT$\_$REG

#define FT$\_$DIRECTORY DT$\_$DIR

#define FT$\_$LINK DT$\_$LNK

#ifndef uint$64\_$t

typedef u$\_$int$64\_$t uint$64\_$t;

#endif

#ifndef uint$32\_$t

typedef u$\_$int$32\_$t uint$32\_$t;

#endif

$//$ This structure is returned by fs$\_$readdir to provide the caller with information

$//$ about each file as it iterates through a directory

struct fs$\_$diriteminfo

$\{$

unsigned short d$\_$reclen; $/*$ length of this record $*/$

unsigned char fileType;

char d$\_$name$[256]$; $/*$ filename max filename is $255$ characters $*/$

$\}$;

$//$ This is a private structure used only by fs$\_$opendir, fs$\_$readdir, and fs$\_$closedir

$//$ Think of this like a file descriptor but for a directory $-$ one can only read

$//$ from a directory. This structure helps you $($the file system$)$ keep track of

$//$ which directory entry you are currently processing so that everytime the caller

$//$ calls the function readdir, you give the next entry in the directory

typedef struct

$\{$

$/*****$TO DO: Fill in this structure with what your open$/$read directory needs $*****/$

unsigned short d$\_$reclen; $/*$ length of this record $*/$

unsigned short dirEntryPosition; $/*$ which directory entry position, like file pos $*/$

DE $*$ directory; $/*$ Pointer to the loaded directory you want to iterate $*/$

struct fs$\_$diriteminfo $*$ di; $/*$ Pointer to the structure you return from read $*/$

$\}$ fdDir;

$//$ Key directory functions

int fs$\_$mkdir$($const char $*$pathname$,$ mode$\_$t mode$)$;

int fs$\_$rmdir$($const char $*$pathname$)$;

$//$ Directory iteration functions

fdDir $*$ fs$\_$opendir$($const char $*$pathname$)$;

struct fs$\_$diriteminfo $*$fs$\_$readdir$($fdDir $*$dirp$)$;

int fs$\_$closedir$($fdDir $*$dirp$)$;

$//$ Misc directory functions

char $*$ fs$\_$getcwd$($char $*$pathname$,$ size$\_$t size$)$;

int fs$\_$setcwd$($char $*$pathname$)$; $//$linux chdir

int fs$\_$isFile$($char $*$ filename$)$; $//$return $1$ if file, $0$ otherwise

int fs$\_$isDir$($char $*$ pathname$)$; $//$return $1$ if directory, $0$ otherwise

int fs$\_$delete$($char$*$ filename$)$; $//$removes a file

$//$ This is the strucutre that is filled in from a call to fs$\_$stat

struct fs$\_$stat

$\{$

off$\_$t st$\_$size; $/*$ total size, in bytes $*/$

blksize$\_$t st$\_$blksize; $/*$ blocksize for file system I$/$O $*/$

blkcnt$\_$t st$\_$blocks; $/*$ number of $512$B blocks allocated $*/$

time$\_$t st$\_$accesstime; $/*$ time of last access $*/$

time$\_$t st$\_$modtime; $/*$ time of last modification $*/$

time$\_$t st$\_$createtime; $/*$ time of last status change $*/$

$/*$ add additional attributes here for your file system $*/$

$\}$;

int fs$\_$stat$($const char $*$path$,$ struct fs$\_$stat $*$buf$)$;

$//$parses the path given to setcwd, returns tokenized array

char $**$ parsePath$($char longPath$[],$ char $*$ parsed$[])$;

$//$ returns index of an already parsed path

int parsedIndex$($char $**$ parsedPath$)$;

DE $*$ loadDir$($const char $*$ pathname$)$;

#endif