Message-Id: <199702062307.RAA23060@sierra.zyzzyva.com>
To: new-httpd@hyperreal.com
Subject: Re: Novel way to kill Apache 
In-reply-to: dgaudet's message of Thu, 06 Feb 1997 12:05:30 -0800.
         <Pine.LNX.3.95dg2.970206120216.31753L-100000@twinlark.arctic.org>
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Date: Thu, 06 Feb 1997 17:07:22 -0600
From: Randy Terbush <randy@zyzzyva.com>
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Reply-To: new-httpd@hyperreal.com


HPUX is also known to do this.

> It can happen on a lot of unixes in my experience.  In fact, all the ones
> that let you scribble into a running executable (i.e. they don't lock the
> executables).  That includes BSD*, linux, solaris, and IRIX.  But some of
> them probably ship with ld that unlink the old executable and create a new
> inode for the new one, (or gnu ld does this, I don't remember). 
> 
> Dynix/ptx won't let you rm a running executable, you have to rename it. 
> That's the only oddball I've ever worked with though.
> 
> Dean
> 
> On Thu, 6 Feb 1997, Ben Laurie wrote:
> 
> > If you build a program under Irix while it is running, it changes the code of
> > the running program, usually resulting in a crash! This comes as a big surprise
> > to me, since a) no other system I use does it, and b) its clearly trivial to
> > avoid. However, my contacts at SGI insist that this is expected and in no way
> > a bug. So, I wonder two things: does any other Unix do this (they claim they
> > do)? And should we have a note somewhere about it, or even change the Makefile
> > to do something like "mv httpd httpd-" (or "rm httpd") before linking?
> > 
> > Cheers,
> > 
> > Ben.
> > 
> > -- 
> > Ben Laurie                Phone: +44 (181) 994 6435  Email: ben@algroup.co.uk
> > Freelance Consultant and  Fax:   +44 (181) 994 6472
> > Technical Director        URL: http://www.algroup.co.uk/Apache-SSL
> > A.L. Digital Ltd,         Apache Group member (http://www.apache.org)
> > London, England.          Apache-SSL author
> >