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| author | Linus Walleij <linus.walleij@linaro.org> | 2015-08-11 14:34:38 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-08-16 10:51:25 +0100 |
| commit | 672f93b6047cc724f002cf50a84f4e8155b86f12 (patch) | |
| tree | e470cebf7514dacc03c8344dab1d610e699ea4ec /tools/iio | |
| parent | a0175b9c76f59c1f5706f986d690e27ba06363dd (diff) | |
| download | lwn-672f93b6047cc724f002cf50a84f4e8155b86f12.tar.gz lwn-672f93b6047cc724f002cf50a84f4e8155b86f12.zip | |
iio: event_monitor: report unsupported events
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@linaro.org>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'tools/iio')
| -rw-r--r-- | tools/iio/iio_event_monitor.c | 6 |
1 files changed, 5 insertions, 1 deletions
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"); |