slack_pseudocode_CIS3207_lab02_shell_program.txt

#includes stdio, stdlib, unistd, iostream, errno.h, string.h
extern char *environ[];
extern int errno;

char* builtins = {"cd", "clr", "dir", "environ", "echo", "help", "pause", "quit"}

const char delim[4] = " /t/n";

launch command( char** argv )

main()
{
  int arg_c = 0;
  char* argv[100]
  
  while (shell operates){

   print("$")
   
   char *input_command = NULL;
   size_t len = 0;
   ssize_t read;

  read = getline(input_command, stdin);
  
  

  char *token = strtok(input command string, " ")
  while(token)
  {
    argv[arg_c] = token
    arg_c++
    token = strtok(NULL, delim);
  }

  argv[argc] = NULL


  //launch command()

  }
}

{}

launch command( char** argv ){

  if (fork() == 0) //CHILD
  {
    execvp( argv[0], argv );
  }

  else
  {
    int status = 0;
    wait(&status);
  }
}


//BUILTINS
void clr(){
  printf(“\e[1;1H\e[2J”);
}

void pause(){

}