[PATCH 3/3] tools: hv: Check return value of poll call

KY Srinivasan kys at microsoft.com
Thu Jun 27 12:32:56 UTC 2013



> -----Original Message-----
> From: Tomas Hozza [mailto:thozza at redhat.com]
> Sent: Thursday, June 27, 2013 7:53 AM
> To: gregkh at linuxfoundation.org
> Cc: jasowang at redhat.com; devel at linuxdriverproject.org; KY Srinivasan; Haiyang
> Zhang; Tomas Hozza
> Subject: [PATCH 3/3] tools: hv: Check return value of poll call
> 
> Check return value of poll call and if it fails print error to the
> system log. If errno is EINVAL then exit with non-zero value otherwise
> continue the while loop and call poll again.
> 
> Signed-off-by: Tomas Hozza <thozza at redhat.com>
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
> ---
>  tools/hv/hv_vss_daemon.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c
> index 6c4d2f1..826d499 100644
> --- a/tools/hv/hv_vss_daemon.c
> +++ b/tools/hv/hv_vss_daemon.c
> @@ -204,7 +204,16 @@ int main(void)
>  		socklen_t addr_l = sizeof(addr);
>  		pfd.events = POLLIN;
>  		pfd.revents = 0;
> -		poll(&pfd, 1, -1);
> +
> +		if (poll(&pfd, 1, -1) < 0) {
> +			syslog(LOG_ERR, "poll failed; error:%d %s", errno,
> strerror(errno));
> +			if (errno == EINVAL) {
> +				close(fd);
> +				exit(EXIT_FAILURE);
> +			}
> +			else
> +				continue;
> +		}
> 
>  		len = recvfrom(fd, vss_recv_buffer, sizeof(vss_recv_buffer), 0,
>  				addr_p, &addr_l);
> --
> 1.8.1.4
> 
> 




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