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Date: Wed, 20 Feb 2002 14:45:39 +0100
From: Corinna Vinschen <cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: recvfrom and timeout signal
Message-ID: <20020220144539.W23094@cygbert.vinschen.de>
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References: <LPBBKFLLCCLABNJIKJOGKELLGOAA DOT pstepien AT aspco DOT com DOT pl>
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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 ?

Are you using an old version of Cygwin?  Your test application
works well on Cygwin 1.3.9.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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