SO far Tests Failed: Test running command with & $,$ Test history $,$ Test invalid command, Test UNIX pipe, Test redirection of input Test redirection of out $>$

prog.cpp file

#include

#include

#include

#include

#include

#include

#include

#define MAX$\_$LINE $80$

int main$($void$)\{$

char $*$args$[$MAX$\_$LINE$/2+1]$;

int should$\_$run $=1$;

char history$[$MAX$\_$LINE$]$;

while $($should$\_$run$)\{$

printf$("$osh$>")$;

fflush$($stdout$)$;

char input$[$MAX$\_$LINE$]$;

fgets$($input$,$ MAX$\_$LINE, stdin$)$;

$//$ Check for history command

if $($strcmp$($input$,"!!$

$")==0)\{$

if $($strlen$($history$)==0)\{$

printf$("$No commands in history

$")$;

continue;

$\}$ else $\{$

strcpy$($input$,$ history$)$; $//$ Use the last command

printf$("\%$s

$",$ history$)$; $//$ Echo the history command

$\}$

$\}$ else $\{$

strcpy$($history$,$ input$)$; $//$ Save command to history

$\}$

$//$ Tokenize the input

char $*$token $=$ strtok$($input$,"$

$")$;

int i $=0$;

int background $=0$;

while $($token $!=$ NULL$)\{$

args$[$i$++]=$ token;

token $=$ strtok$($NULL$,"$

$")$;

$\}$

args$[$i$]=$ NULL;

if $($i $>0$ && strcmp$($args$[$i $-1],"$&$")==0)\{$

background $=1$;

args$[$i $-1]=$ NULL;

$\}$

$//$ Exit command

if $($strcmp$($args$[0],$ "exit"$)==0)\{$

should$\_$run $=0$;

continue;

$\}$

pid$\_$t pid $=$ fork$()$;

if $($pid $<mtext></mtext><mn>0</mn><mi>)</mi><mtext></mtext><mi>\{</mi>$

perror$("$Fork failed"$)$;

exit$(1)$;

$\}$ else if $($pid $==0)\{$

$//$ Child process

execvp$($args$[0],$ args$)$;

perror$("$exec failed"$)$;

exit$(1)$;

$\}$ else $\{$

$//$ Parent process

if $(!$background$)\{$

wait$($NULL$)$;

$\}$

$\}$

$\}$

return $0$;

$\}$

Include commands got deleted so i included photo