From 42ad18e4d639f17f3e57ba4ed330cd555605b178 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 24 Jan 2012 13:43:21 +0200
Subject: warn if written size is different to original one
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This patch also eliminates compiler warning:
yavta.c: In function ‘video_save_image’:
yavta.c:974:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[Print different messages depending on whether the return value is
negative or positive]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
yavta.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/yavta.c b/yavta.c
index b5b4487..2636577 100644
--- a/yavta.c
+++ b/yavta.c
@@ -1006,6 +1006,12 @@ static void video_save_image(struct device *dev, struct v4l2_buffer *buf,
ret = write(fd, dev->buffers[buf->index].mem, buf->bytesused);
close(fd);
+
+ if (ret < 0)
+ printf("write error: %s (%d)\n", strerror(errno), errno);
+ else if (ret != (int)buf->bytesused)
+ printf("write error: only %d bytes written instead of %u\n",
+ ret, buf->bytesused);
}
static int video_do_capture(struct device *dev, unsigned int nframes,
--
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