[libvirt] PATCH: Block & reset signals when fork/exec'ing children

[Daniel P. Berrange]

On Tue, Aug 12, 2008 at 01:27:03PM +0100, Daniel P. Berrange wrote:
> The process using libvirt can have setup arbitrary signal handlers. In
> the libvirtd case we have one attached to SIGCHILD, and the handler writes
> to a pipe which is then processeed in the main loop. When you fork() signal
> handlers are preserved in the child process, but you may well not want the
> signal handlers to be run in the children - for example in LXC we closed
> the FD associated the pipe after fork(), and that FD is now asociated 
> with a socket we use to talk to the container. So if the original signal
> handler is run bad stuff will happen in the child. 

Actually ignore this version of the patch for now - it mixes in some
code re-arrangement to fix some error reporting, but there's some more
troublesome error reporting problems still broken. So I'll do a patch
to fix error reporting first, and then re-post this.

Daniel
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