ast_comparator/test/student_data/handout/shlab-handout/cases/reference_21_tsh.c
/* 
 * builtin_cmd - If the user has typed a built-in command then execute
 *    it immediately.  
 */
If the user has typed a built-in command then execute
it immediately.
If the user has typed a built - in command then execute it immediately .
int builtin_cmd(char **argv)
{
    if (strcmp(argv[0], "quit")==0)
    {
        exit(0);
    }
    else if (strcmp("jobs", argv[0])==0)
    {
        listjobs(jobs);
        return 1;
    }
    else if (strcmp("bg", argv[0])==0)
    {
        do_bgfg(argv);
        return 1;
    }
    else if (strcmp("fg", argv[0])==0)
    {
        do_bgfg(argv);
        return 1;
    }
    return 0;
}
int builtin_cmd ( char * * argv ) { if ( strcmp ( argv [ 0 ] , " " ) == 0 ) { exit ( 0 ) ; } else if ( strcmp ( " " , argv [ 0 ] ) == 0 ) { listjobs ( jobs ) ; return 1 ; } else if ( strcmp ( " " , argv [ 0 ] ) == 0 ) { do_bgfg ( argv ) ; return 1 ; } else if ( strcmp ( " " , argv [ 0 ] ) == 0 ) { do_bgfg ( argv ) ; return 1 ; } return 0 ; }
builtin_cmd - If the user has typed a built-in command then execute
    it immediately.
builtin_cmd - If the user has typed a built - in command then execute it immediately .
// quit command // List all the jobs for job command // Running do_fgbg funcion for bf comkmand // Running do_fgbg function for fg comkmand //If it is not a builtin command