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Date: Thu, 11 Sep 2008 07:01:09 +0200
From: Dominic Fandrey <kamikaze@bsdforen.de>
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To: John Baldwin <jhb@freebsd.org>
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Cc: freebsd-gnats-submit@freebsd.org, freebsd-amd64@freebsd.org
Subject: Re: amd64/127276: ldd invokes linux yes
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John Baldwin wrote:
> On Wednesday 10 September 2008 01:44:36 pm Dominic Fandrey wrote:
>>> Number:         127276
>>> Category:       amd64
>>> Synopsis:       ldd invokes linux yes
>>> Confidential:   no
>>> Severity:       serious
>>> Priority:       medium
>>> Responsible:    freebsd-amd64
>>> State:          open
>>> Quarter:        
>>> Keywords:       
>>> Date-Required:
>>> Class:          sw-bug
>>> Submitter-Id:   current-users
>>> Arrival-Date:   Wed Sep 10 17:50:01 UTC 2008
>>> Closed-Date:
>>> Last-Modified:
>>> Originator:     Dominic Fandrey
>>> Release:        RELENG_7
>>> Organization:
>> private
>>> Environment:
>> FreeBSD mobileKamikaze.norad 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Fri 
> Aug 29 23:22:22 CEST 2008     
> root@mobileKamikaze.norad:/usr/obj/HP6510b/amd64/usr/src/sys/HP6510b  amd64
>>> Description:
>> When ldd is used on linux yes it invokes it instead of producing the usual 
> output.
>> # pkg_info -W /compat/linux/usr/bin/yes
>> /compat/linux/usr/bin/yes was installed by package linux_base-f8-8_4
>> # sysctl compat.linux.osrelease
>> compat.linux.osrelease: 2.6.16
>>
>> This behaviour breaks pkg_libchk from the sysutils/bsdadminscripts port.
>>> How-To-Repeat:
>> # ldd /compat/linux/usr/bin/yes
> 
> ldd is not going to work for Linux binaries.  The Linux ldd should be used for 
> Linux binaries.
> 

I don't need it to work, I just need it not to invoke linux binaries. I'm
using ldd in a script and by ldd not returning 0 the script should know that
it hasn't encountered a valid binary. Instead ldd opens a linux binary like
yes and the script spills out ys (yes) or waits for input from stdin
(md5sum). I'm pretty certain ldd is in no way meant to invoke programs.