Re: Advice Required - for avoiding conflict betwen qmail-smtpd, rblsmtpd loaded as shared objects in tcpserver

Manvendra Bhangui <[email protected]> wrote:
> In recent past I worked on an idea that I had to eliminate the frequent
> fork() / exec() calls made by tcpserver for incoming emails

Er, why?

tcpserver does this by design.  Part of the reason for that is separation of
privelege; no child process, which handles a single connection, can interfere
with the operation of any other connection, even if the exec'd program is a
buggy mess of security holes.  In other words, it's a security feature.

It's also extremely efficient; the process is tiny and a fork/exec is cheap on
reasonable operating systems and even vaguely-modern hardware.  Do you
actually have data showing that this minimal overhead is a bottleneck in your
situation?  If not, why are you trying to eliminate it?

Charles
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