void add_arg(char *arg)
static void add_arg(char *arg)
void add_arg(char *arg){	if (strlen(command_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) {		printf("add_arg: Too many command line arguments!\n");		exit(1);	}	if(strlen(command_line) > 0)		strcat(command_line, " ");	strcat(command_line, arg);}