Compiling posix-winsync Plugin for 389 Directory Server on Linux

https://github.com/cgrzemba/Posix-Winsync-Plugin-for-389-directory-server is a plugin for the 389 directory server that enables the syncing of posix attributes between 389 and Active Directory. It was written for Solaris and I was unable to produce a working linux binary of it using the supplied files. I was able to compile and link it by hand in RHEL 6.2. To do this you will need the binary and devel packages for 389 and nspr. The pkgconfig files (.pc) for both of those should help you if my gcc flags or ld flags don't work on your system. Once you have those in place, the following commands in the directory for the project should produce a shared object file that can be copied to where your 389 directory server plugins are (for me, /usr/lib64/dirsrv/plugins).

• gcc -fPIC -I/usr/include/nspr4 -DUSE_OPENLDAP -I/usr/include/dirsrv -I /usr/include/ -c posix-winsync.c
• gcc -fPIC -I/usr/include/nspr4 -DUSE_OPENLDAP -I/usr/include/dirsrv -I /usr/include/ -c posix-winsync-config.c
• gcc -fPIC -I/usr/include/nspr4 -DUSE_OPENLDAP -I/usr/include/dirsrv -I /usr/include/ -c posix-group-func.c
• ld -shared -L/usr/lib64 -lplds4 -lplc4 -lnspr4 -lpthread -ldl -L/usr/lib64/dirsrv -lslapd posix-group-func.o posix-winsync-config.o posix-winsync.o -o libposix-winsync.so

At this point you should run

ldd libposix-winsync.so

to make sure all the libraries required by that file can be found. I had to create a new entry in /etc/ld.so.conf.d to point to /usr/lib64/dirsrv and run ldconfig for it to find libslapd.so.0. I'm not sure how the other 389 plugins worked without setting that.

Then you need to import import the ldif file that comes with the plugin in to your 389 server. The way the plugin seems to work is when you set up a windows sync agreement it will also sync posix attributes. If it cannot find a required attribute, it will not sync that user/group.

It would be nice to create an RPM of this and extend the plugin so the list of attributes it syncs can be dynamic/optional, but for now it gets the job done.