Shared library accessible by root and not by regular user

simopal6 · 10-12-2010, 03:58 AM

Hello!
I'm trying to install Google Chrome on Slackware 13.1 (32 bit) and I have a little problem with shared libraries.
The google-chrome applications looks for nss libraries with file names ending in apparently non-standard ways (for me and my system, at least): for example, it looks for libnns3.so.1d, but I have libnss3.so, so I created a symbolic link libnss3.so.1d -> libnss3.so. The problem now is that if I run google-chrome as my usual regular user I still get the missing library error, but if I run it as root I don't get the error anymore (well, it still complains about other libraries missing for the same naming reason, but anyway it's able to find the one I just renamed).
The permissions seems fine to me:

Code:

/usr/lib# ls -l | grep seamonkey
lrwxrwxrwx   1 root root       15 Jun 16 22:03 seamonkey -> seamonkey-2.0.4
drwxr-xr-x  14 root root     4096 Oct 12 10:47 seamonkey-2.0.4

Code:

/usr/lib/seamonkey# ls -l | grep nss3
-rwxr-xr-x 1 root root  873192 Apr  2  2010 libnss3.so
lrwxrwxrwx 1 root root      10 Oct 12 10:07 libnss3.so.1d -> libnss3.so

Does anybody have an explanation to this? :-)
Thank you!

prayag_pjs · 10-12-2010, 04:40 AM

With user root are you able to, browse ith google chrome successfully,any site?

simopal6 · 10-12-2010, 10:14 AM

I haven't tried yet, I miss the GConf libraries, but since I'm not going to use Chrome as root, I focused on the shared library problem with my unprivileged user.

simopal6 · 10-12-2010, 11:14 AM

Ok, actually, it's not a problem regarding being root or not, but simply it seems that google-chrome cannot find the renamed libraries unless my working directory is the one those libraries are in (that is, /usr/lib/seamonkey). I don't know why this happens, since /usr/lib/seamonkey is in /etc/ld.so.conf. Any idea?
Thanks!

paulsm4 · 10-12-2010, 11:38 AM

Hi -

1. Use "ldd" to see exactly what shared libraries an executable or library depends on, and exactly where it expects to find them.

EXAMPLES: "ldd MYPROG", or "ldd MYLIB.so"

2. Set "$LD_LIBRARY_PATH" if you need to point to another, different directory.

EXAMPLE: "export LD_LIBRARY_PATH=/opt/lib:$LD_LIBRARY_PATH"

'Hope that helps

simopal6 · 10-13-2010, 07:22 AM

It works if I run google-chrome as "LD_LIBRARY_PATH=/usr/lib/seamonkey google-chrome". Then why doesn't putting the "/usr/lib/seamonkey" line in /etc/ld.so.conf work?

paulsm4 · 10-13-2010, 11:31 AM

Quote:

It works if I run google-chrome as "LD_LIBRARY_PATH=/usr/lib/seamonkey google-chrome"

You're welcome

Prego. Glad I could help.

But better syntax would be:

"LD_LIBRARY_PATH=/usr/lib/seamonkey:$LD_LIBRARY_PATH"

PS:
If you change ld.so.conf, then you also need to run "ldconfig" to update the cache.

simopal6 · 10-14-2010, 08:48 AM

Actually, I would like to solve the ld.so.conf problem :-) What are the possible reasons why putting the relevant line there doesn't work and using LD_LIBRARY_PATH works? And yes, I did run ldconfig after changing the file :-)
Thanks again!