Changing passwords on both UNIX & SAMBA

[Aaron Rainwater/CADC Co-op]

Here's the parts of my smb.conf that I believe are pertinent:

-----------------------------------------
null passwords = true
security = user
unix password sync = True
encrypt passwords = yes
passwd program = /usr/bin/passwd
passwd chat = "*Enter login(NIS) password*" %o\n "*New password*" %n\n
"*Re-enter new password*" %n\n "*NIS passwd/attributes changed on*"
passwd chat debug = Yes
-----------------------------------------

I get this error when I run "testparm".  Is there a
'passwd chat' script that will allow me to use encrypted
passwords?

-----------------------------------------
ERROR: the 'passwd chat' script [*Enter login(NIS) password*" %o\n "*New
password*" %n\n "*Re-enter new password*" %n\n "*NIS passwd/attributes
changed on*] expects to use the old plaintext password via the %o
substitution. With encrypted passwords this is not possible.
-----------------------------------------

I suspect this is the problem for when I try to use smbpasswd to change
both the SMB password and the UNIX password.  Here's the output from my
smbpasswd session:

-----------------------------------------
>> smbpasswd -U $USER -r $SMB_SERVER -D 4
Old SMB password:
New SMB password:
Retype new SMB password:
resolve_name: Attempting lmhosts lookup for name cadc_smb1<0x20>
startlmhosts: Can't open lmhosts file /usr/local/samba/lib/lmhosts.
Error was No such file or directory
resolve_name: Attempting host lookup for name cadc_smb1<0x20>
Connecting to 157.95.15.60 at port 139
machine cadc_smb1 rejected the password change: Error was : The
specified password is invalid.
Failed to change password for aar
-----------------------------------------

The SMB password is changed successfully when I comment out
the following settings:

#unix password sync = True
#passwd program = /usr/bin/passwd
#passwd chat = "*Enter login(NIS) password*" %o\n "*New password*" %n\n
"*Re-enter new #password*" %n\n "*NIS passwd/attributes changed on*"
#passwd chat debug = Yes

I thought that I might be able to write a script that will change both
the UNIX and SMB passwords at the same time, but I don't know how to get
the UNIX "passwd" program to accept arguments from a script, which
"smbpasswd"
is supposed to be able to do.

-- 
Aaron Rainwater
CADC Co-op