From: Brendan Le Foll <brendan.le.foll@intel.com>
Date: Mon, 21 Dec 2015 15:48:28 +0000 (+0000)
Subject: iio.c: Check return of fd before using ioctl
X-Git-Tag: v0.9.0~2
X-Git-Url: http://review.tizen.org/git/?p=contrib%2Fmraa.git;a=commitdiff_plain;h=e98bd8653a1d8d7500ae751b8c6f4ca455f4e48a

iio.c: Check return of fd before using ioctl

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
---

diff --git a/src/iio/iio.c b/src/iio/iio.c
index 1d02983..26dba06 100644
--- a/src/iio/iio.c
+++ b/src/iio/iio.c
@@ -443,8 +443,12 @@ mraa_iio_event_poll(mraa_iio_context dev, struct iio_event_data* data)
 
     snprintf(bu, MAX_SIZE, IIO_SLASH_DEV "%d", dev->num);
     fd = open(bu, 0);
-    ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
-    close(fd);
+    if (fd != -1) {
+        ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
+        close(fd);
+    } else {
+        return MRAA_ERROR_UNSPECIFIED;
+    }
 
     if (ret == -1 || event_fd == -1)
         return MRAA_ERROR_UNSPECIFIED;