ast_comparator/test/student_data/handout/shlab-handout/cases/prev_13_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);
	}
	if(strcmp(argv[0], "jobs") == 0){ 
		listjobs(jobs);
		return 1;
	}
	else if((strcmp(argv[0], "fg") == 0) || (strcmp(argv[0], "bg") == 0)){ 
		do_bgfg(argv);
		return 1;
	}
	else if(strcmp(argv[0], "&") == 0){ 
		return 1;
	}
  return 0;     
}
int builtin_cmd ( char * * argv ) { if ( strcmp ( argv [ 0 ] , " " ) == 0 ) { exit ( 0 ) ; } if ( strcmp ( argv [ 0 ] , " " ) == 0 ) { listjobs ( jobs ) ; return 1 ; } else if ( ( strcmp ( argv [ 0 ] , " " ) == 0 ) || ( strcmp ( argv [ 0 ] , " " ) == 0 ) ) { do_bgfg ( argv ) ; return 1 ; } else if ( strcmp ( argv [ 0 ] , " " ) == 0 ) { 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 .
/* return 1 when it is builtin_cmd */ /* do not just use "==". It causes bugs. */ /* show jobs. */ /* It is do_bgfg's turn. */ /* It is same as just enter. */ /* not a builtin command */