01-15-2013
The user accounting in AIX is a bit more complicated than you seem to assume: there is not only "/etc/passwd" but also "/etc/security/passwd", similar for groups. In addition some information might be stored in the ODM. You have to change these files and make sure their contents match somehow, otherwise inconsistencies can be expected.
Without complete information i am left to guesses, but first i would check this and make sure the user database is consistent with itself.
The problem about "only root can do that" is probably caused by sloppy programming: usually the system uses numeric UIDs and these are only translated to names via consulting "/etc/passwd" for human convenience (quite like IP addresses are translated via "/etc/passwd"). Some utility might, instead of sticking to this convention, use user names instead of IDs though.
I hope this helps.
bakunin
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LEARN ABOUT NETBSD
slapd-passwd
SLAPD-PASSWD(5) File Formats Manual SLAPD-PASSWD(5)
NAME
slapd-passwd - /etc/passwd backend to slapd
SYNOPSIS
/etc/ldap/slapd.conf
DESCRIPTION
The PASSWD backend to slapd(8) serves up the user account information listed in the system passwd(5) file. This backend is provided for
demonstration purposes only. The DN of each entry is "uid=<username>,<suffix>". Note that non-base searches scan the the entire passwd
file, and are best suited for hosts with small passwd files.
CONFIGURATION
This slapd.conf option applies to the PASSWD backend database. That is, it must follow a "database passwd" line and come before any subse-
quent "backend" or "database" lines. Other database options are described in the slapd.conf(5) manual page.
file <filename>
Specifies an alternate passwd file to use. The default is /etc/passwd.
ACCESS CONTROL
The passwd backend does not honor any of the access control semantics described in slapd.access(5). Only read (=r) access to the entry
pseudo-attribute and to the other attribute values of the entries returned by the search operation is honored, which is performed by the
frontend.
FILES
/etc/ldap/slapd.conf
default slapd configuration file
/etc/passwd
user account information
SEE ALSO
slapd.conf(5), slapd(8), passwd(5).
OpenLDAP 2012/04/23 SLAPD-PASSWD(5)