[vdr] [patch] avoid inheritance of file descriptors

Deti Fliegl deti at fliegl.de
Mon Dec 10 22:30:10 CET 2007


Deti Fliegl wrote:
> 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.
... except on dvr devices, I know.

Deti




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