Meh Another Shell

mash.c

//
//  main.c
//  Mash
//
//  Created by Gregory Disney on 10/12/14.
//  Copyright (c) 2014 Gregory Disney. All rights reserved.
//

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <ncurses.h>
/* to compile run gcc mash.c -o mash -Wformat-security -Wint-conversion -Wincompatible-pointer-types -lreadline -lncurses -Wformat-security */
int profile(void)
{
    char *p1 = "PATH";
    char *p2 = "/bin:/usr/bin:/usr/local/bin:/usr/local/sbin:/usr/sbin:/sbin";
    int m;
    setenv(p1, p2, m);
    char *p3 = "PROFILE";
    char *p4 = "source .mashrc";
    setenv(p3, p4, m);
    return (0);
}

int new_profile(char *p3, char *p4)
{
    char *p1 = "PATH";
    char *p2 = "/bin:/usr/bin:/usr/local/bin:/usr/local/sbin:/usr/sbin:/sbin";
    int m;
    setenv(p1, p2, m);
    setenv(p3, p4, m);
    system("source /etc/bashrc");
    return (0);
}
int shell(void)
{
    rl_bind_key('\t', rl_complete);
    using_history();
    profile();
    initscr();
    sleep(0);
    char *f = readline("$ ");
    printw(f);
    if (strcmp(f, "chdir") == 0) {
        char *g = readline("$ chdir: ");
        chdir(g);
        f = "echo > /dev/null";
    }
    if (strcmp(f, "help") == 0) {
        printf("Mash Help: \n chdir => change directory\n exit => exit\n commands => list commands\n root => loads root env\n");
        f = "echo > /dev/null";
    }
    if (strcmp(f, "commands") == 0) {
        printf("Available commands: ");
        f = "ls /usr/bin /bin";
    }
    if (strcmp(f, "root") == 0) {
        seteuid(0);
        printf("Loading root enviorment\n");
        f = "su -l root -c '/bin/mash'; sudo -s;";
        f = "whoami";
    }
    if (strcmp(f, "exit") == 0) {
        printf("Exiting Mash");
        endwin();
        exit(0);
    }
    if (strcmp(f, "history") == 0){
        history_list();
    }
    if (strcmp(f, "alias") == 0){
        char *h = readline("$ alias: ");
        char *i = readline("$ refernce: ");
        new_profile(h, i);
    }
    add_history(f);
    system(f);
    return (0);
}

int main(void)
{
    while(1)
        shell();
    return(0);
}