Re: [Exim] Re: Exim 4.33 local_scan() problem

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Autor: Richard.Hall
Data:  
Para: Tom Kistner
CC: Andrew - Supernews, exim-users
Asunto: Re: [Exim] Re: Exim 4.33 local_scan() problem
I think people have mis-remembered things (or I have completely
misunderstood them!)

On Wed, 5 May 2004, Tom Kistner wrote:

> Andrew - Supernews wrote:
>
> > If you close stderr and don't plan on immediately reopening it, then
> > always, always point it at /dev/null instead.
>
> Good plan. I'm not sure what the reasons are for closing the fds
> (getting rid of a terminal!?), but I'll leave that to Philip. The
> problem is big, since a lot of code is now linked into exim that may
> sputter to fds 1/2 under some circumstances ...



BUT BUT BUT ... from ChangeLog-4.21:-

72. When Exim is about to re-exec itself, it ensures that the file descriptors
    0, 1, and 2 exist, because some OS complain for execs without them (see
    ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
    descriptors. However, the code omitted to check that the open succeeded,
    causing mysterious errors if for some reason the permissions on /dev/null
    got screwed. Now Exim writes a message to the main and panic logs, and
    bombs out if it can't open /dev/null.


> regards,
>
> /tom


HTH,
Richard