Create a shell in C language
1) Create an argument tokenizer then write a main() functionthat prints a prompt inputed by user, accepts input, and tokenizesthe input.
2) Use the argument vector to an executeCmd() function with intexecuteCmd(char **args);
3) The function should return a -1 if an error, or a zerootherwise. Inputing an “x†in the prompter will exit theprogram.
4) Write an executeCmd() function that can execute any programin the background and redirect the output of any program to a file.Any number of functions can be executed in executeCmd() such aslisting the files in the current directory, listing files in longformat or displaying current working directory (ls, ls -a,pwd).
5) The program should run in the background working on thefunction, but the prompt should be available to take new requests($ cat prog.c &).
6) Function execBackground() should be used to determine when ajob should run in the background. The function will strip the‘&’ character from the argument vector. This function will alsolet the output of a running program to be redirected to a file ($grep if prog.c > foo).
7) The maker should include two source files and one header fileas well as a makefile. The main() function, the executeCmd()function and all supporting functions will be in a fileprogram_exec.c and the function prototype for executeCmd()program_exec.h.
