text: #ifndef SHELL_H
  #define SHELL_H
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  extern char *prompt;
  extern int commandLen;
  
  void initShell();
  void handleArgs(int argc, char **argv);
  void parseCommand(int *count, char ***args, char *command);
  int countArgs(char *command);
  void handleCommand(int argc, char **argv);
  void bExit();
  int pid();
  int ppid();
  void cd(const char *path);
  char *pwd();
  void set(char *env, char *value, int set);
  char *get(char *env);
  void foreground(int argc, char **argv);
  void background(int argc, char **argv);
  
  #endif