This makes the event monitor bail out with a helpful error
message if a device does not support events, as a related
fix to iio core now makes it return -ENODEV properly.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
tools/iio/iio_event_monitor.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index cd3fd41b481d..d51eb04202e9 100644
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -284,7 +284,11 @@ int main(int argc, char **argv)
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");
--
2.4.3
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