On Wed, Sep 30, 2009 at 11:32:06AM +0200, Guillaume Blairon wrote:
> test_delivery:
> driver = pipe
> command = ${lookup{test}dbmnz{/tmp/test.db}}
>
> As you can see, argv[0] contains "/bin/echo test". I'm not a programming
> expert but according to execve(2), that's bad.
>
> Is this a normal behaviour ? If so, how can I ensure that exim will
> correctly split the command and its args before calling execve() ?
The 4.68 spec says: "The command is split up into separate arguments by Exim,
and each argument is separately expanded, as described in section 29.3". i.e.
the split into argv[0] + arguments happens /before/ expansion, not afterwards.
So yes, this behaviour is as per spec, and therefore normal.
Maybe you'd prefer:
command = sh -c ${lookup{test}dbmnz{/tmp/test.db}}
which is three arguments: "sh", "-c", and then the result of the expansion.
Insert usual security lecture here, which may or may not be appropriate
depending on your application.
Regards,
--
Dave Evans
http://djce.org.uk/
http://djce.org.uk/pgpkey
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