pg_dumpall in crontab

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Hi all,

I have a stange problem when executing pg_dumpall as a cron job.

The crontab entry looks like:
05 22 *  *  1-5 postgres /usr/bin/pg_dumpall -D >
/disks/postgres/db.pg_dumpall

On stderr I get the message
connected to template1...
/usr/bin/pg_dumpall: 0: Bad file descriptor

The createt dumpfile looks like:
- --
- -- pg_dumpall (7.2)   -D
- --
\connect template1
DELETE FROM pg_shadow WHERE usesysid <> (SELECT datdba FROM pg_database
WHERE datname = 'template0');

CREATE USER "werner" WITH SYSID 100 CREATEDB CREATEUSER;
CREATE USER ....                // more users

DELETE FROM pg_group;

There are no further lines in here.

When calling
# /disks/postgres/db.pg_dumpall -D > /disks/postgres/db.pg_dumpall'
manually as user postgres the dumpfile continues like:

- --
- -- Database alc
- --
\connect template1 werner
CREATE DATABASE "alc" WITH TEMPLATE = template0 ENCODING = 'SQL_ASCII';
etc.
etc.

What is the reason for this strange behaviour?
I'm running PostgreSQL 7.2 on SuSE 7.2

- --
- --------------------------------------------------------------
    ALC Computertechnik GmbH
Kaiserstr. 100, D-52134 Herzogenrath, GERMANY
Fon +49 2407 95810
Fax +49 2407 958139
http://www.alc.de
- --------------------------------------------------------------
Werner Modenbach       modenbach@alc.de
- --------------------------------------------------------------
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