PREUN

/bin/sh

[ $1 = 0 ] && update-alternatives --remove mount.cifs /bin/mount.cifs3 ||:

POSTIN

/bin/sh

update-alternatives --install /bin/mount.cifs mount.cifs \
/bin/mount.cifs3 10 \
--slave /sbin/mount.cifs smount.cifs /sbin/mount.cifs3 \
--slave /bin/umount.cifs umount.cifs /bin/umount.cifs3 \
--slave /sbin/umount.cifs sumount.cifs /sbin/umount.cifs3 \
--slave /sbin/cifs.upcall cifs.upcall /sbin/cifs.upcall3 \
--slave /usr/share/man/man8/mount.cifs.8.xz mount.cifs.8 /usr/share/man/man8/mount.cifs3.8.xz \
--slave /usr/share/man/man8/umount.cifs.8.xz umount.cifs.8 /usr/share/man/man8/umount.cifs3.8.xz \
--slave /usr/share/man/man8/cifs.upcall.8.xz cifs.upcall.8 /usr/share/man/man8/cifs.upcall3.8.xz \
|| update-alternatives --auto mount.cifs

Triggers

samba-client < 3.0.11-1mdk

/bin/sh

update-alternatives --auto mount.cifs