failure to connect to postgres DB via pg.el

[Martin Steffen]

Hi,

I recently stumbled over the following problem, recently because the setup
worked fine for some years, only that when I changed recently to a new
linux distribution (from Suse 10 to the latest Fedora core), things broke.

The set-up is as follows:


I got a postgres data base running on a linux machine (the data base works
ok, it seems, as I can connect to it using the psql ``user interface'' to
interact with it).

I want to connect, however, via emacs, in particular, I used
to use the package 

             pg.el (Version: 0.10, 2002, it seems)

for it. Now, part of the proper use of it is establishing the
connection with the data base, which is done by:

(setq myconnection (pg:connect "data-base-name" "user-name") )

Now: this connection does no longer work, i.e., I'm refused
access, giving back the following verdict appended below the end of
the article.

Does anybody know how to repair that?  

I'm not sure where the problem lies (as said, the set-up worked with the same
version of pg.el and basically the same emacs version before). There seem two 
possible
sources:

  - either emacs/pg does no longer transmit my name properly (I 
      remember I had problems with encodings some time ago)

  - or postgres applies tougher access restrictions on 
     the new linux distribution, and therefore rejects me


     What is strange, however, is that I can access the
     running data base as "user-name" using the command-line
     tool psql just fine, without being rejected.



Thanks, Martin




  signal(error ("Backend error: FATAL:  Ident authentication failed for user 
\"user-name\"\n"))
  error("Backend error: %s" "FATAL:  Ident authentication failed for user 
\"msteffen\"\n")

  byte-code("..... process connection pg:SM_USER pg:SM_OPTIONS pg:SM_UNUSED 
generate-new-buffer " *PostgreSQL*" nil open-network-stream "postgres" fboundp 
set-buffer-process-coding-system binary set-buffer-multibyte vector 
cl-struct-pgcon 1 pg:send-int 4 2 pg:send accept-process-output 0 error 
"pgcon-process accessing a non-pgcon" pg:read-char 69 "Backend error: %s" 
pg:read-string 4096 82 pg:read-net-int pg:initialize-parsers pg:exec "SET 
datestyle = 'ISO'" throw --cl-block-pg:connect-- 5 "Crypt authentication not 
supported" "Kerberos4 authentication not supported" "Kerberos5 authentication 
not supported" "Can't do that type of authentication: %s" "Problem connecting: 
expected an authentication response" pg:SM_TTY user-packet-length host port 
pg:StartupPacketSize pg:PG_PROTOCOL_63_MAJOR ...] 7)