getpwent and duplicate names in /etc/master.passwd

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

Hi all,
while looking at the code for getpwent, I stumbled across an
inconsistency in the behavior of pwd_mkdb. If /etc/master.passwd
contains a duplicate name (e.g. two lines for root), this is preserved
in spwd.db, but not in /etc/passwd. Is there any reason for such
behavior? Should pwd_mkdb reject installing the password file in first
place?

Joerg