systemy-operacyjne-2018-rozwiazania/microshell/microshell.c

//Skrypt wykonany za pomoca poradnika  https://www.youtube.com/watch?v=O5YVGg81Gdo  https://www.youtube.com/watch?v=5Qim9wufNP0 oraz kursów i instrukcji ogólno dostępnych w internecie
//Kopiowanie oraz korzytsanie z kodu do własnych potrzeb zabronione 
    #include <stdio.h>
    #include <unistd.h>
    #include <stdlib.h>
    #include <pwd.h>
    #include <string.h>
    #include <wait.h>
    #include <time.h>
    #define space " \n"
    #define max_c 500
    #define BRIGHT 1
    #define GREEN 32
    #define BLUE 34
    #define PINK 35
    #define CYAN 36
    void help() {
        printf(" Robert Stachecki \n Obslugiwane polecenia: \n exit \n cd \n pwd \n date \n help \n exit \n date \n");
    }
    void clear(){
    printf("\033[H\033[J");
    } 
    const char *getUserName()
    {
      uid_t uid = geteuid();
      struct passwd *pw = getpwuid(uid);
      return pw->pw_name;
    }
    void date(){
    time_t t = time(NULL);
    struct tm *tm = localtime(&t);
    char s[64];
    strftime(s, sizeof(s), "%c", tm);
    printf("%s\n", s);
    }
    int main()
    {
        char cwd[512], hostName[128], *pwd[1000];
        register struct passwd *pw;
        register uid_t uid;
        uid = geteuid ();
        pw = getpwuid (uid);
        char line[max_c], lend[max_c], * commands[max_c], ** command;
        while (1) {
        gethostname(hostName, 128);
        getcwd(cwd, 512);
        printf("%c[%dm%s",0x1B, GREEN, pw->pw_name);
        printf("%c[%dm",0x1B,0);
        printf("@");
        printf("%c[%dm%s ",0x1B, PINK, hostName);
        printf("%c[%dm%s",0x1B, CYAN, cwd);
        printf("%c[%dm $ ",0x1B, GREEN);
        printf("%c[%dm",0x1B,0);
        fflush(stdout);
        if (fgets(line, max_c, stdin )) {
            command = commands;
            *command++ = strtok(line,space);
            while ((*command++ = strtok(NULL,space)));
        if (strcmp(commands[0], "help")==0) help();

        else if (strcmp(commands[0], "exit")==0) {
             printf ("Zakończono działanie\n");
             exit(0);
        }
        else if (strcmp(commands[0], "cd")==0) {
            if (commands[1]==0) printf("Wymagany argument\n");
            int ret;
            ret = chdir(commands[1]);
            strcpy(lend, "pwd");
        }
        else if (strcmp(commands[0], "date") == 0){  date();  }
        else if (strcmp(commands[0], "clear") == 0){  clear();  }
        else if (strcmp(commands[0], "pwd")==0) printf ("%s\n", cwd);
            }
        }

        return 0;
    }