samba - Oct 1999 - Samba - Unix password sync

Hi,

in the last weeks I've unsuccessfully tried to get Samba (2.0.5a) -
Unix (Suse 6.2) password sync working. Maybe somebody can give me a
hint, what's wrong. Enclosed you'll find additional information.

Thank you for helping,

	Johannes


--------
smb.conf:

passwd chat = *password* %n\n *password* %n\n *Password*

--------
password chat (manually):

homer:~ # /bin/passwd web
New password:
New password (again):
Password changed

--------
log.smb (at level 100)

[1999/10/20 17:46:24, 7] passdb/smbpass.c:endsmbfilepwent(81)
  endsmbfilepwent: closed password file.
[1999/10/20 17:46:24, 3] smbd/chgpasswd.c:chgpasswd(394)
  Password change for user: web
[1999/10/20 17:46:24, 10] smbd/chgpasswd.c:findpty(77)
  findpty: Allocated slave pty /dev/pts/1
[1999/10/20 17:46:24, 3] smbd/chgpasswd.c:chat_with_program(369)
  Dochild for user web (uid=0,gid=0)
[1999/10/20 17:46:24, 10] smbd/chgpasswd.c:dochild(189)
  Invoking '/bin/passwd web' as password change program.
[1999/10/20 17:46:25, 100] smbd/chgpasswd.c:talktochild(263)
  talktochild: chatbuf=[*password*] responsebuf=[New password: ]
[1999/10/20 17:46:25, 100] smbd/chgpasswd.c:talktochild(276)
  talktochild: sendbuf=[fisch
  ]
[1999/10/20 17:46:25, 100] smbd/chgpasswd.c:talktochild(263)
  talktochild: chatbuf=[*password*] responsebuf=[
  New password (again): ]
[1999/10/20 17:46:25, 100] smbd/chgpasswd.c:talktochild(276)
  talktochild: sendbuf=[fisch
  ]
[1999/10/20 17:46:29, 10] lib/util_sock.c:read_with_timeout(386)
  read_with_timeout: timeout read. select timed out.
[1999/10/20 17:46:29, 100] smbd/chgpasswd.c:talktochild(263)
  talktochild: chatbuf=[*Password*] responsebuf=[]
[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:talktochild(266)
  response 3 incorrect
[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:chat_with_program(316)
  Child failed to change password: web
[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:chat_with_program(347)
  The process exited while we were waiting
--------
----------------------------------------------------------------------------
Johannes Weberhofer >>> IT-Technologies
Austria

email: Johannes.Weberhofer@ibm.net
tel: +43 (0)3178 - 3679
tel: +43 (0)1 - 204 28 65
----------------------------------------------------------------------------

On Thu, 21 Oct 1999 02:32:29 +1000, hai scritto:
>[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:talktochild(266)
>  response 3 incorrect
>[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:chat_with_program(316)
>  Child failed to change password: web
>[1999/10/20 17:46:29, 3] smbd/chgpasswd.c:chat_with_program(347)
>   
This is the same problem that I have (rh60).
I can change the password 1 out of 5 times on average, the other times I
get "The process exited while we were waiting".
I posted about this to samba-technical in response to the announce of
samba-2.0.6pre2.

-- 
giulioo@tiscalinet.it

"Johannes Weberhofer" <Johannes.Weberhofer@ibm.net>
wrote:
>in the last weeks I've unsuccessfully tried to get Samba (2.0.5a) -
>Unix (Suse 6.2) password sync working. Maybe somebody can give me a
>hint, what's wrong. Enclosed you'll find additional information.
>[1999/10/20 17:46:25, 100] smbd/chgpasswd.c:talktochild(276)
>  talktochild: sendbuf=[fisch
>  ]
>[1999/10/20 17:46:29, 10] lib/util_sock.c:read_with_timeout(386)
>  read_with_timeout: timeout read. select timed out.
Deadlock and timeout occured.

The passwd(1) command uses getpass(3) function that calls
tcsetattr(3) function with NOECHO termios and TCSAFLUSH action
to prevent from echoing password.

If smbd sends a string of `passwd chat' parameter before passwd
calls getpass(3), that string is discarded! Then smbd and passwd
are waiting for each other while timed out by smbd.

AFAIK there is same problem in Solaris 2.x, some Linux distributions
(redhat and so on), FreeBSD.
>From tcsetattr(3) on Solaris 2.6:
	*** snip ***

     int tcsetattr(int fildes, int optional_actions,
          const struct termios *termios_p);

	*** snip ***

     o If optional_actions is TCSAFLUSH, the  change  will  occur
       after all output written to fildes is transmitted, and all
       input so far received  but  not  read  will  be  discarded
       before the change is made.

-- >8 -- signature -- >8 --
SATOH Fumiyasu
fumiya@cij.co.jp,   http://www.bento.ad.jp/~fumiya/
fumiya@samba.gr.jp, http://www.samba.gr.jp/