Re: Library support for two-phase daemonization

[Alan Barrett <apb%cequrux.com@localhost>]

On Tue, 28 Jan 2014, Andreas Gustafsson wrote:
> I propose to do this by adding the two functions daemon2_fork() and
> daemon2_detach() to libc.  A patch containing my proposed changes is
> at:
>
>   http://www.gson.org/netbsd/patches/daemon2-v9.patch

Please could you show how to implement daemon() in terms of daemon2_*.

Could the args be passed to daemon2_fork() instead of to
daemon2_detach(), to make it easier to convert code from using daemon()
to daemon2_*()?

If we are redesigning this interface, then perhaps we should go 
further, and provide a richer list of things to do in between 
the fork and the detach.  Some possible things one might want to 
do are:  setuid, chroot, chdir(somewhere other than "/"), 
anything that posix_spawn() can do.

--apb (Alan Barrett)