Re: "DSO load failed" when using mod_authn_dbm for Berkeley DB

[Luca Toscano <toscano.luca@xxxxxxxxx>]

2016-05-12 7:09 GMT+02:00 Tianyin Xu <tixu@xxxxxxxxxxx>:

Sorry Luca, I misspelled your name in my last email. :-(

No problem at all :)

 

On Wed, May 11, 2016 at 9:55 PM, Tianyin Xu <tixu@xxxxxxxxxxx> wrote:

Thanks, Loca!

Yes, I did set AuthDBMUserFile (the whole point for this module is to use a DBM file to do the authn control, isn't it?)

Thanks for the new info!

 

I generate the file called dbm-auth-file using dbmmanger 

$ file dbm-auth-file
dbm-auth-file: Berkeley DB (Hash, version 9, native byte-order)

and then I loaded the module and configured it in a <Directory> as follows,

    AuthType Basic

    AuthName Documents

    AuthBasicProvider dbm

    AuthDBMType DB

    AuthDBMUserFile "/home/tixu/httpd-2.4.20-bin/dbm-auth-file" 

and then I got the "DSO load failed" message:

[Thu May 05 18:12:29.915467 2016] [authn_dbm:error] [pid 9107:tid 140031532377856] (20019)DSO load failed: [client 127.0.0.1:54442] AH01754: could not open dbm (type DB) auth file: /home/tixu/httpd-2.4.20-bin/dbm-auth-file

I changed the AuthBasicProvider to be "default" and used "htdbm" to create the DBM files (in which can it generates a .dir and .pag file). And the module goes correctly. 

Thus, I'm sure there it the problem of the "AuthDBMType". But I'm not sure if this is a bug in the implementation of mod_authn_dbm or a problem of some native libs in my system or some incompatibility caused by the dbmmanger? 

mod_authn_dbm calls APR to open the DBM file, definitely supporting Berkeley DB but with the note "not all may be available at run time":

https://apr.apache.org/docs/apr/2.0/group___a_p_r___util___d_b_m.html#gaf7295ba8157f487b78319e168e1344b4

From what I can see, the error comes all the way from the function dbm_open_type or  in APR (apr_dbm.c).

It might be a problem of the httpd/apr version that you are using and/or related configure flags needed. Could you please give us more details? After this issue is resolved I'll update the documentation with more details!

Luca