[libcamera-devel] libcamera: test: Fixed the compilation issue

Message ID 1591130194-5161-1-git-send-email-madhavan.krishnan@linaro.org
State Accepted
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Series
  • [libcamera-devel] libcamera: test: Fixed the compilation issue
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Commit Message

Madhavan Krishnan June 2, 2020, 8:36 p.m. UTC
The return value of write() function is ignored, causing the following
compiler error|warning with gcc version 5.4

error: ignoring return value of 'ssize_t write(int, const void*, size_t)'

Fix this by storing the return value of write() and return a test error in
case of failure.

Reported-by: Coverity CID=284605

Signed-off-by: Madhavan Krishnan <madhavan.krishnan@linaro.org>
---
 test/file.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Comments

Laurent Pinchart June 2, 2020, 8:41 p.m. UTC | #1
Hi Madhavan,

Thank you for the patch.

No need to prefix the subject line with 'libcamera:' for the tests.

On Tue, Jun 02, 2020 at 10:36:34PM +0200, Madhavan Krishnan wrote:
> The return value of write() function is ignored, causing the following
> compiler error|warning with gcc version 5.4
> 
> error: ignoring return value of 'ssize_t write(int, const void*, size_t)'
> 
> Fix this by storing the return value of write() and return a test error in
> case of failure.
> 
> Reported-by: Coverity CID=284605
> 
> Signed-off-by: Madhavan Krishnan <madhavan.krishnan@linaro.org>
> ---
>  test/file.cpp | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/test/file.cpp b/test/file.cpp
> index 6262a6f..e328c01 100644
> --- a/test/file.cpp
> +++ b/test/file.cpp
> @@ -27,13 +27,16 @@ protected:
>  	{
>  		fileName_ = "/tmp/libcamera.test.XXXXXX";
>  		int fd = mkstemp(&fileName_.front());
> +		ssize_t ret;
> +
>  		if (fd == -1)
>  			return TestFail;
>  
> -		write(fd, "libcamera", 9);
> +		ret = write(fd, "libcamera", 9);

You can declare the ret variable on the same line.

> +
>  		close(fd);
>  
> -		return TestPass;
> +		return ret == 9? TestPass : TestFail;

Missing space after 9. I'll fix when applying,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

>  	}
>  
>  	int run()

Patch

diff --git a/test/file.cpp b/test/file.cpp
index 6262a6f..e328c01 100644
--- a/test/file.cpp
+++ b/test/file.cpp
@@ -27,13 +27,16 @@  protected:
 	{
 		fileName_ = "/tmp/libcamera.test.XXXXXX";
 		int fd = mkstemp(&fileName_.front());
+		ssize_t ret;
+
 		if (fd == -1)
 			return TestFail;
 
-		write(fd, "libcamera", 9);
+		ret = write(fd, "libcamera", 9);
+
 		close(fd);
 
-		return TestPass;
+		return ret == 9? TestPass : TestFail;
 	}
 
 	int run()