cfag12864b_fd 40 samples/auxdisplay/cfag12864b-example.c int cfag12864b_fd; cfag12864b_fd 53 samples/auxdisplay/cfag12864b-example.c cfag12864b_fd = open(path, O_RDWR); cfag12864b_fd 54 samples/auxdisplay/cfag12864b-example.c if (cfag12864b_fd == -1) cfag12864b_fd 58 samples/auxdisplay/cfag12864b-example.c MAP_SHARED, cfag12864b_fd, 0); cfag12864b_fd 60 samples/auxdisplay/cfag12864b-example.c close(cfag12864b_fd); cfag12864b_fd 73 samples/auxdisplay/cfag12864b-example.c close(cfag12864b_fd);