samba - Nov 2003 - samba passwd program not running as root on OpenBSD

This has been posted on misc@openbsd as well.

Hi,
I'm setting up samba, no PDC or anything else complex and having a lot of
trouble with the passwd chat. It appears to be a bug? somewhere, but its not
clear to me. Can anyone shed any light? See below for relevant info.
Thanks

running smbpasswd:
/home/paul $ smbpasswd
Old SMB password:
New SMB password:
Retype new SMB password:
machine 127.0.0.1 rejected the password change: Error was : RAP86: The
specified password is invalid.
Failed to change password for paul

relevant smb.conf lines:
encrypt passwords = Yes
min passwd length = 5
map to guest = Bad User
null passwords = No
pam password change = No
passwd program = /usr/bin/passwd %u
passwd chat = *New*password* %n\n *Retype*new*passwordn* %n\n
passwd chat debug = Yes
unix password sync = Yesin my samba logs:[2003/11/25 17:27:47, 10]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:dochild(211)
Invoking '/usr/bin/passwd paul' as password change program.[2003/11/25
17:27:47, 100]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:expect(265)
expect: expected [*New*password*] received [passwd: who are you ??  ] match
no[2003/11/25 17:27:47, 100]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:expect(265)
expect: expected [*New*password*] received [] match no[2003/11/25 17:27:47,
10]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:expect(276)
expect: returning False[2003/11/25 17:27:47, 3]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:talktochild(
302)  Response 1 incorrect[2003/11/25 17:27:47, 3]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:chat_with_pr
ogram(363)  Child failed to change password: paul[2003/11/25 17:27:47, 3]
/usr/obj/i386/samba-2.2.8a/samba-2.2.8a/source/smbd/chgpasswd.c:chat_with_pr
ogram(408)  The status of the process exiting was 256
looking at passwd.c this appears to be the relevant section:
username = getlogin();
if (username == NULL) {
fprintf(stderr, "passwd: who are you ??\n");
exit(1);
}