Date: Mon, 29 May 2006 03:59:55 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Ruslan Ermilov <ru@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.bin/file magic.5 Message-ID: <20060529105954.GX49081@funkthat.com> In-Reply-To: <20060529102126.GD44223@ip.net.ua> References: <200605280715.k4S7Fa1E083206@repoman.freebsd.org> <20060529102126.GD44223@ip.net.ua>
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Ruslan Ermilov wrote this message on Mon, May 29, 2006 at 13:21 +0300:
> On Sun, May 28, 2006 at 07:15:36AM +0000, John-Mark Gurney wrote:
> > jmg 2006-05-28 07:15:36 UTC
> >
> > FreeBSD src repository
> >
> > Modified files:
> > usr.bin/file magic.5
> > Log:
> [...]
> > compiling mgc on a big endian system (specificly tested sparc64) breaks,
> > using one from a little endian system works
> >
> > Revision Changes Path
> > 1.24 +18 -0 src/usr.bin/file/magic.5
> >
> I have another experience from cross-build research. Namely,
> only a native endianness format of *.mgc file works. Just
> confirmed this on a freshly installed 6.1-RELEASE:
>
> : Script started on Mon May 29 13:01:57 2006
> : sun# uname -sm
> : FreeBSD sparc64
> : sun# file magic.mgc*
> : magic.mgc: magic binary file for file(1) cmd (version 2) (big endian)
> : magic.mgc_: magic binary file for file(1) cmd (version 2) (little endian)
> : sun# file /bin/sh
> : /bin/sh: ELF 64-bit MSB executable, SPARC V9, version 1 (FreeBSD), dynamically linked (uses shared libs), stripped
> : sun# mv magic.mgc magic.mgc~
> : sun# mv magic.mgc_ magic.mgc
> : sun# file /bin/sh
> : /bin/sh: data, dynamically linked (uses shared libs), stripped
> : sun# file magic.mgc*
> : magic.mgc: magic binary file for file(1) cmd (version 33554432) (big endian)
> : magic.mgc~: JPEG 2000 image
> : sun# exit
> : exit
> :
> : Script done on Mon May 29 13:02:49 2006
>
> I.e., using a LE magic.mgc gives bullshit on a BE system. Can you
> please re-check?
This was w/ a -current system...
Hmm. this is wierd:
# cd /usr/share/misc
# uname -a
FreeBSD carbon.funkthat.com 7.0-CURRENT FreeBSD 7.0-CURRENT #27: Mon Apr 17 19:02:25 PDT 2006 jmg@carbon.funkthat.com:/usr/home/jmg/p4/world/src/sys/i386/compile/carbon i386
# file -C -m magic
# file magic
magic: magic text file for file(1) cmd
# file /tmp/*.CRW
Segmentation fault (core dumped)
That last part was the wierd part... and if I copied the magic.mgc
from my 5.4-R box, it worked fine w/ the same line to match the CRW...
(See below before you point out that above isn't a sparc64 box)
And the magic line is:
# tail -n 1 magic
0 string II\x1a\x00 Canon RAW
If I remove that line, the compile works, and file returns data:
# file /tmp/*.CRW
/tmp/CRW_0171.CRW: data
Wow, I must of really been tired when I made that commit, now that I
think about it, I was testing i386 to i386.. so I'll drop the big
endian bit, but it is a bit worry some that -current's file is broken..
# ident magic
magic:
$Id: Localstuff,v 1.4 2003/03/23 04:17:27 christos Exp $
Add the above magic line to that file, and I get a seg fault...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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