Re: [Chicken-users] Question about forks, pipes and sigchld handling

[Peter Bex]

On Wed, Oct 03, 2012 at 06:21:45PM +0200, Peter Bex wrote:
> Hi all,
> 
> I'm trying to figure out the behavior of process-fork and the
> handling of signal/chld (SIGCHLD).  Here's a simple program
> which simply sets up a pipe and forks.  The parent process reads
> from the pipe, the child writes to it.

[program elided]

> This program works just fine and prints ("hello, world").
> If I uncomment the signal handler code (which should just be a no-op),
> it hangs.  I don't understand the reason for this.  Could anyone
> enlighten me as to what's happening here?

Turns out this was a bug in Chicken core's handling of EINTR in getc()
calls: 
http://lists.nongnu.org/archive/html/chicken-hackers/2012-10/msg00010.html

Cheers,
Peter
-- 
http://sjamaan.ath.cx
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