tools:iio:iio_event_monitor: add error handling

Add error handling to calls which can indicate a major problem by
returning an error code.

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index 1374374208ee2df0deab116c5ef625d194f8ee2a..1316527f3c3c8fc799ef400ee116bbbbf5894f00 100644 (file)
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -286,7 +286,10 @@ int main(int argc, char **argv)
                goto error_free_chrdev_name;
        }
 
-       close(fd);
+       if (close(fd) == -1)  {
+               ret = -errno;
+               goto error_free_chrdev_name;
+       }
 
        while (true) {
                ret = read(event_fd, &event, sizeof(event));
@@ -304,7 +307,9 @@ int main(int argc, char **argv)
                print_event(&event);
        }
 
-       close(event_fd);
+       if (close(event_fd) == -1)
+               perror("Failed to close event file");
+
 error_free_chrdev_name:
        free(chrdev_name);
 error_ret: