[vdr] [patch] avoid inheritance of file descriptors

[Darren Salt]

I demand that Deti Fliegl may or may not have written...

> Anssi Hannula wrote:
>> Deti Fliegl wrote:
>>> Klaus Schmidinger wrote:
>>>> Doesn't SystemExec() (see tools.c) take care of this?
>>> Yes you are right - it takes care internally but not for plugins like 
>>> dvdswitch etc. In order to fix this problem you could patch every single 
>>> plugin or just set the right file descriptor flag once. I think the 
>>> latter does not cause any interference and should solves some issues.
>> For the record, the latter creates a small race condition: an external
>> program could be launched before FD_CLOEXEC is set on an fd.

> In VDR all file descriptors seem to be allocated at startup. IMHO it is 
> not very likely that a race condition could happen.