[Alpine-info] ldap-servers and $USER possible?

[Liam Gretton]

On 17/04/2009 14:49, Eduardo Chappa wrote:

> On Fri, 17 Apr 2009, Liam Gretton wrote:

> 

> :) Every means of quoting and escaping I've tried has failed. Here's what 

> :) I have ldap-servers set to currently:

> :) 

> :) ldap-servers=host.com:port "/base=dc=host,dc=com/binddn=${USER}"

> 

> You need to recompile Alpine to make this work.


[snip]


>   I did not try this, but it should work.


It does indeed, thanks.

Unfortunately my example above isn't the whole story, so I still have a 
problem. The username actually ahs to be prefixed with an AD domain name 
  (e.g. dom\user). Introducing the backslash prevents the expansion of 
the environment variable though, no matter how I try to escape the slash 
itself. Having looked at the expand_variables() function in pith/conf.c 
I can see there are two means of escaping using \\$ or $$, but the 
closest I get is by using:

ldap-servers=host.com:port "/base=dc=host,dc=com/binddn=dom\$${USER}"

which becomes dom\$user instead of dom\user.

I wonder if there's a bug in expand_variables() where \\$ is expanded 
here are lines 4758 and 4759 of pith/conf.c:

#if !(defined(DOS) || defined(OS2))
         if(*src == '\\' && *(src+1) == '$'){

I think that second line be

         if(*src == '\\' && *(src+2) == '$'){

When it is, I can use

ldap-servers=host.com:port "/base=dc=host,dc=com/binddn=dom\\\${USER}"

and get the correct expansion.

-- 
Liam Gretton                                    liam.gretton at le.ac.uk
HPC Architect                                http://www.le.ac.uk/its/
IT Services                                   Tel: +44 (0)116 2522254
University Of Leicester, University Road
Leicestershire LE1 7RH, United Kingdom