[vdr] [patch] avoid inheritance of file descriptors

Deti Fliegl deti at fliegl.de
Mon Dec 10 22:23:02 CET 2007


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.

Deti




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