shell.h

/* 
    Name : UdayKumar Upputuri
    Date : 10/06/2026
    Project Name : Minishell
    Description: Implementing a minimalistic shell, mini-shell(msh) as part of the Linux Internal module.
*/

#ifndef HEADER_H
#define HEADER_H

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdio_ext.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
 

#define BUILTIN		1
#define EXTERNAL	2
#define NO_COMMAND  3

#define RED     "\x1b[31m"
#define GREEN   "\x1b[32m"
#define YELLOW  "\x1b[33m"
#define BLUE    "\x1b[34m"
#define MAGENTA "\x1b[35m"
#define CYAN    "\x1b[36m"
#define RESET   "\x1b[0m"

//sturcture to store the stopped processes
typedef struct list{
    int pid;
    char cmd[30];
    struct list *link;
}list;

int insert_first();
int delete_first();
int print_list();

void scan_input(char *prompt, char *input_string);
char *get_command(char *input_string);

//void copy_change(char *prompt, char *input_string);        //logic written in scan.c itself only

int check_command_type(char *command);
void echo(char *input_string, int status);
void execute_internal_commands(char *input_string);
void execute_external_commands(char *input_string);
void signal_handler(int sig_num);
void extract_external_commands(char **external_commands);   //extracts external commands from file and storing it in 2D array

#endif