tools:iio:iio_event_monitor: save right errno (5fdb8c61) · Commits · 戴 / test

Move up error handling code to preserve the errno coming from ioctl(), before it may be changed by close(). Signed-off-by:

tools/iio/iio_event_monitor.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -275,15 +275,17 @@ int main(int argc, char **argv)
		}

		ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);

		close(fd);

		if (ret == -1 \|\| event_fd == -1) {
		ret = -errno;
		fprintf(stdout, "Failed to retrieve event fd\n");
		if (close(fd) == -1)
		perror("Failed to close character device file");

		goto error_free_chrdev_name;
		}

		close(fd);

		while (true) {
		ret = read(event_fd, &event, sizeof(event));
		if (ret == -1) {