Re: recvfrom and timeout signal

[Christopher Faylor <cygwin at cygwin dot com>]

On Tue, Feb 19, 2002 at 11:51:59PM +0100, Piotr Stepien wrote:
>Christopher,
>
>Hope this working test case is small enough. I removed all unecessary code.
>Please let me know if you need anything else.

I wasn't asking for personal email.  That's precisely why I set the
Reply-To and Mail-Followup-To to go to the cygwin mailing list.

"Someone" does not necessarily mean me.

cgf

>-----Original Message-----
>From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf Of
>Christopher Faylor
>Sent: Tuesday, February 19, 2002 10:42 PM
>To: cygwin@cygwin.com
>Subject: Re: recvfrom and timeout signal
>
>
>On Tue, Feb 19, 2002 at 10:28:02PM +0100, Piotr St?pie? wrote:
>>Hi All,
>>
>>I try to implement timeout for recvfrom:
>>
>>	struct	sigaction action;
>>	action.sa_handler = alarm_signal;
>>	action.sa_flags = 0;
>>	sigemptyset(&(action.sa_mask)); 	/* ignore all known signals */
>>	sigaction(SIGALRM,&action,NULL);  	/* ensures that SA_RESTART is NOT set
>*/
>>
>>	alarm(TIMEOUT);
>>	int st=recvfrom(sockfd,buff,sizeof(buff),0,(sockaddr*)&srv_addr,&sz);
>>	if(st == -1){
>>		if(errno==EINTR){
>>			/* timeout */
>>		}else{
>>			alarm(0); /* reset alarm */
>>		}
>>	}
>>
>>but the process is never woken by SIGALRM when no packet is received.
>>The recvfrom waits forever.
>>
>>Has anybody an idea what can be wrong ?
>
>Nope.  Send an actual small working test case and someone will probably
>investigate it.

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