Re: Is there a way to use "pack" in pl/perl without resorting to pl/perlu?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Herouth Maoz <herouth(at)unicell(dot)co(dot)il>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Is there a way to use "pack" in pl/perl without resorting to pl/perlu?
Date: 2012-09-12 14:47:03
Message-ID: 25348.1347461223@sss.pgh.pa.us
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Herouth Maoz <herouth(at)unicell(dot)co(dot)il> writes:
> I created a function that does some heavy string manipulation, so I needed to use pl/perl rather than pl/pgsql.
> I'm not experienced in perl, but the function works well when used as an independent perl subroutine - it depends only on its arguments. I use the Encode package (in postgresql configuration).

> But my use of the "pack" function causes a Safe error. Apparently "pack" and "unpack" are in the operator mask.

> Is there any way to remove them from that mask?

My recollection is that they're intentionally excluded because they
would otherwise be security holes --- there are some format codes that
allow direct access to memory, or something like that.

regards, tom lane

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