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Re: Problem editing file

From: Ben Pfaff
Subject: Re: Problem editing file
Date: Thu, 19 Mar 2009 21:16:12 -0700
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)

John Darrington <address@hidden> writes:

> On Fri, Mar 20, 2009 at 12:26:25AM -0300, Michel Boaventura wrote:
>      > I'm also trying to use one windows function to do it (MoveFileEx). Let
>      > see if it works.
>      Well, it works. I can save a file just clicking on the "SAVE" button.
>      What I did was change the "rename" to:
>      ok = MoveFileEx(rf->tmp_name, rf->file_name, MOVEFILE_REPLACE_EXISTING) 
> != 0;
>      and insert an "#include <windows.h>" on the top of the file.
>      I need to use "!= 0" because it only returns zero if a error happens.
>      Now I guess that if you or john put a precompiler option to change it
>      if we are compiling to linux or windows we could solve this issue.
> I don't think it's really pspp's role to fix buggy mingw behaviour.
> It should be done by the the Mingw, libc or gnulib people.  (at this
> stage, I'm not sure which).  If none of the maintainers of those
> libraries will do it, then we could look at fixing it in pspp, but I
> think that should be a last resort.

I guess that this is a Mingw issue.  C99 says the following about

    If a file named by the string pointed to by new exists prior
    to the call to the rename function, the behavior is

POSIX defines this behavior as (see

    If the directory named by the new argument exists, it shall
    be removed and old renamed to new.

Whereas Windows has a contradictory specification (see

    The new name must not be the name of an existing file or

I guess that we should follow up to a mingw mailing list.
Aim to please, shoot to kill.

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