From: Hartmut Knaack <knaack.h@gmx.de>
Date: Sun, 31 May 2015 12:39:59 +0000 (+0200)
Subject: tools:iio:iio_utils: check amount of matches
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=dc8b5d6e633f8e54f70594d0be87aaf401ea0559;p=openwrt%2Fstaging%2Fblogic.git

tools:iio:iio_utils: check amount of matches

fscanf() usually returns the number of input items successfully matched
and assigned, which can be fewer than provided (or even zero).
Add a check in iioutils_get_type() to make sure all items are matched.

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

diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index f12bc2e81c80..c5b4136e648a 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -144,6 +144,10 @@ int iioutils_get_type(unsigned *is_signed,
 				ret = -errno;
 				printf("failed to pass scan type description\n");
 				goto error_close_sysfsfp;
+			} else if (ret != 5) {
+				ret = -EIO;
+				printf("scan type description didn't match\n");
+				goto error_close_sysfsfp;
 			}
 			*be = (endianchar == 'b');
 			*bytes = padint / 8;