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Re: read-file

From: Simon Josefsson
Subject: Re: read-file
Date: Fri, 16 Jun 2006 21:45:10 +0200
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.50 (gnu/linux)

address@hidden (Larry Jones) writes:

> Aaron Stone writes:
>> If I were using a function like this, I'd expect NULL on error (and
>> errno set according to fopen), and an empty string if the file is empty.
> Note that the C Standard doesn't require fopen to set errno and
> traditional implementations didn't, at least in some cases.

The docstring intentionally avoids saying that errno is set to
something useful:

   *LENGTH.  On errors, *LENGTH is undefined, errno preserves the
   values set by system functions (if any), and NULL is returned. */

I guess it could explicitly set errno, but I'm not sure that is such a
good style either...

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