ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
if (ret == -1 || event_fd == -1) {
ret = -errno;
- fprintf(stderr, "Failed to retrieve event fd\n");
+ if (ret == -ENODEV)
+ fprintf(stderr,
+ "This device does not support events\n");
+ else
+ fprintf(stderr, "Failed to retrieve event fd\n");
if (close(fd) == -1)
perror("Failed to close character device file");