[gentoo-user] Acroread DRM Bug?

[gentoo-user] Acroread DRM Bug?

[Michael Volland]

Hi,

our public library uses Adobe Digital Rights Management.
That means you download a paper/book and open it with acroread.

It used to work fine with gentoo ~amd64 but not with ~x86 and x86.
(I assume it works with amd64 as well, can't just test it)

Acroread always crashed, when I tried to open a drm-protected document
on x84-installations.

The reason is, that acroread (acroread-9.4.2) is installed as binary,
but dynamically linked and when you open a drm-protected document, it
tries to load the non-existing library /usr/lib32/libidn.so.11.

To reproduce:
in xterm:
$ export ACRODEBUG=1
$ acroread

now open drm-protected document

dlopen: libidn.so.11: cannot open shared object file: No such file or
directory

This library is part of app-emulation/emul-linux-x86-baselibs-20110928
which is usually installed with non-x86 installations.

So I installed emul-linux-x86-baselibs and did set a softlink from
/usr/lib32/libidn.so.11 to /usr/lib. It works fine.

But lately I ran into problems after upgrading gcc. I couldn't emerge
qt-gui
anymore. Actually I had to remove the link, rename /usr/lib32 and
reemerge gcc. Then it was possible to emerge qt-gui.

Any suggestions?
Could there be a library on x86 installation, that one could use?
Could I hide the library from ebuilds other than acroread?
Should I file a gentoo-bug-report?

Greetings
Michael

Re: [gentoo-user] Acroread DRM Bug?

[Florian Philipp]

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Am 25.12.2011 19:56, schrieb Michael Volland:
> Hi,
> 
> our public library uses Adobe Digital Rights Management.
> That means you download a paper/book and open it with acroread.
> 
> It used to work fine with gentoo ~amd64 but not with ~x86 and x86.
> (I assume it works with amd64 as well, can't just test it)
> 
> Acroread always crashed, when I tried to open a drm-protected document
> on x84-installations.
> 
> The reason is, that acroread (acroread-9.4.2) is installed as binary,
> but dynamically linked and when you open a drm-protected document, it
> tries to load the non-existing library /usr/lib32/libidn.so.11.
> 
> To reproduce:
> in xterm:
> $ export ACRODEBUG=1
> $ acroread
> 
> now open drm-protected document
> 
> dlopen: libidn.so.11: cannot open shared object file: No such file or
> directory
> 
> This library is part of app-emulation/emul-linux-x86-baselibs-20110928
> which is usually installed with non-x86 installations.
> 
> So I installed emul-linux-x86-baselibs and did set a softlink from
> /usr/lib32/libidn.so.11 to /usr/lib. It works fine.
> 
> But lately I ran into problems after upgrading gcc. I couldn't emerge
> qt-gui
> anymore. Actually I had to remove the link, rename /usr/lib32 and
> reemerge gcc. Then it was possible to emerge qt-gui.
> 
> Any suggestions?
> Could there be a library on x86 installation, that one could use?
> Could I hide the library from ebuilds other than acroread?
> Should I file a gentoo-bug-report?
> 
> Greetings
> Michael
> 
> 

Solution: File a bug on b.g.o. Maybe the acroread dev can bundle a
libidn.so.11 with acroread.

Workaround: Symlink libidn.so.11 on some location outside the usual lib
directory structure (I suggest /usr/local/acroread/lib). Create a shell
script wrapper around acroread which calls
`LD_LIBRARY_PATH=/usr/local/acroread/lib acroread`

That way, only acroread will "see" this lib.

Hope this helps,
Florian Philipp


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Re: [gentoo-user] Acroread DRM Bug?

[Sebastian Beßler]

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On 26.12.2011 13:42, Florian Philipp wrote:

> Solution: File a bug on b.g.o. Maybe the acroread dev can bundle a
> libidn.so.11 with acroread.

The better solution is to emerge net-dns/libidn.

$ equery b libidn.so.11
 * Searching for libidn.so.11 ...
app-emulation/emul-linux-x86-baselibs-20110928 (/usr/lib32/libidn.so.11
-> libidn.so.11.6.5)
net-dns/libidn-1.23 (/usr/lib64/libidn.so.11 -> libidn.so.11.6.6)

See also https://bugs.gentoo.org/show_bug.cgi?id=396079 opend by the
original poster after solving the problem in the german list.



Greetings

Sebastian Beßler


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