Date: Thu, 10 Aug 1995 19:49:19 -0700 (PDT) From: Mike Pritchard <mpp> To: jkh@time.cdrom.com (Jordan K. Hubbard) Cc: graichen@sirius.physik.fu-berlin.de, hackers@freebsd.org Subject: Re: /etc/magic hacker needed ! Message-ID: <199508110249.TAA28940@freefall.FreeBSD.org> In-Reply-To: <27028.807608437@time.cdrom.com> from "Jordan K. Hubbard" at Aug 5, 95 00:40:37 am
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Jordan K. Hubbard wrote:
>
> > is'nt there anybody out there who could /etc/magic hack that way file will
> > result in correct results for FreeBSD core's and objext-files:
>
> Huh. This sounds familiar.. :-)
>
> To: Thomas Graichen <graichen@sirius.physik.fu-berlin.de>
> cc: hackers@freebsd.org
> Subject: Re: bugs & problems in 2.0.5
> In-reply-to: Your message of "Tue, 11 Jul 1995 11:04:23 +0200."
> <9507110904.AA21396@sirius.physik.fu-berlin.de>
> Date: Wed, 12 Jul 1995 01:33:59 -0700
> Message-ID: <24918.805538039@time.cdrom.com>
> From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
> >...
> > graichen@mordillo:~> cat test.c
> > void main(void){}
> > graichen@mordillo:~> gcc -c test.c
> > graichen@mordillo:~> file test.o
> > test.o: NetBSD/i386 object file not stripped
>
> I tried this and I have to agree that this looks rather embarassing,
> espcially having our .o's identified as "NetBSD/i386 object files"; it
> makes it look to the casual user like we're running their stuff in
> some sort of emulation mode or something :-)
>
> It would also be nice to have identification of core files. If you
> look at the NetBSD/i386 core file entry, it even appears to ferret the
> name of the executable out of the core file and display it. Nice!
>
> I fooled around with od and /etc/magic a little bit but was unable to
> get core recognition to work in the short 2 minutes I had to devote to
> the problem.. :-)
>
> Anyone out there game for a little puzzle? The mission: To see how
> many types of files you can get recognised by /etc/magic! :-)
>
> Jordan
>
> Clearly, no one out there was game for a little puzzle back in
> the middle of July, anyway.. :-)
Actually, I did get a little curious back then and did some poking
around. As to the core files, NetBSD actually writes out a little
header with a core-file magic number, so file(1) has no problem
finding their core files. FreeBSD doesn't do this, so there isn't
an easy way to recognize our core files.
I didn't look at the .o format yet, and I don't have access to a
NetBSD machine, so this one is somewhat tough to deal with.
Anyone care to send me/make available some NetBSD and BSDI .o files?
I did, however, go ftp the latest version of file from somewhere,
and it looks like the latest version has a lot of updated magic
files we could use. I think I'll wait until all of the cvs import
issues are sorted out before I do anything with it.
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