samba - Feb 2006 - nobody run "add user script = /usr/sbin/useradd ....."

Greetings!  
        
      I have the following configuration:  
        
      Two PDCs with Fedora Core 4: PDC1 and PDC2.  
        
      PDC1 trusts  PDC2, respectively PDC2 is trusted to PDC1.  
      I join an XP workstation to PDC2. After restart i can see both domains  
in the login screen domain combo box.
    I can logon to PDC2 , but not to PDC1, since the PDC2's /etc/passwd 
lacks the username from PDC1 i am trying to log in with. To correct  this i edit
smb.conf adding this line:
        
        
      add user script = /usr/sbin/useradd %u -g users -s /bin/false -d /dev/null
        
    After another unsuccessful login to PDC1 (with username ivan for  example)
in the PDC2's log (/var/log/samba/winxp.log) can be seen the  following
lines:
        
      useradd: unable to lock password file  
      useradd ....gave 1  
        
        
      When i try to access a share on PDC2 with a PDC1 user (ivan for  
example), useradd is   executed successfully, and user ivan   is added to  
/etc/passwd.
        
    I found out that during login "add user script = /usr/sbin/useradd %u 
......" is executed with user nobody, and this user has no right to 
execute useradd, hence an error occurs.
        
      After that i added user nobody in the /etc/sudoers so he could execute  
sudo on PDC2:
        
      visudo -f sudoers  
      %nobody  ALL=/usr/sbin/useradd  
        
      And edited smb.conf on PDC2 like this:  
        
      add user script = sudo -u root /usr/sbin/useradd %u ......  
        
        
      Now the logging to PDC1 works fine, but this is not normal!  
        
      My question is:  
    Is this a bug in samba, why when mapping a drive useradd runs as root  (as
described in the samba manual), but when logging, it runs as user  nobody who
has no right to execute useradd?
        
      If am wrong - correct me, or point me to another solution.  
          
      Thanks in advance  :-)   
		
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