here I confirm that the problem is only present for cron.d/amavisd-new as
it is run by the amavis user and so there is no "su -c" involved.
It's easy to reproduce with a script like this:
------------test.sh-------------
#!/bin/sh
CMD="/bin/echo foo >/dev/null"
exec ${CMD}
--------------------------------
$ ./test.sh
foo >/dev/null
$
I made different tests with different commands using ">/dev/null"
outside of quotes in the amavisd-new-cronjob script and cannot see any
side effect, it properly redirect STDOUT to /dev/null and keep STDERR if
any:
-do_amavis_cmd "/usr/bin/sa-learn --sync >/dev/null"
+do_amavis_cmd "/usr/bin/sa-learn --sync" >/dev/null
But you can also just move the >/dev/null in the if/then/else part as
this is common to both commands.
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