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From: Chong Yidong <cyd@stupidchicken.com>
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Subject: Re: Please try Pmail
Date: Sun, 18 Jan 2009 20:41:40 -0500
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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Stefan Monnier <monnier@iro.umontreal.ca> writes:

> It uses `make-temp-file' whose main purpose is to encpasulate the code
> needed to create a temp file safely.  If make-temp-file is not safe,
> then we should fix it.

I just double-checked, and actually the situation looks OK:
make-temp-file makes the temp-file with restrictive permissions (400),
and assures that the created file is new.