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From Dean Gaudet <>
Subject Re: Novel way to kill Apache
Date Thu, 06 Feb 1997 20:05:30 GMT
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.


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:
> Freelance Consultant and  Fax:   +44 (181) 994 6472
> Technical Director        URL:
> A.L. Digital Ltd,         Apache Group member (
> London, England.          Apache-SSL author

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