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>

1 files changed, 7 insertions, 2 deletions

diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index 1374374208ee..1316527f3c3c 100644
--- 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: