[OpenWrt-Devel] [PATCH procd] service: start apps with LD_PRELOAD & lib disabling buffering

John Crispin blogic at openwrt.org
Sat Jun 20 15:35:48 EDT 2015



On 20/06/2015 20:53, Rafał Miłecki wrote:
> On 20 June 2015 at 13:56, Jo-Philipp Wich <jow at openwrt.org> wrote:
>>> i dont like this idea at all. calling ld-preload on every started app
>>> just seems wrong
>>
>> I was the one suggesting the idea since we needed a solution which does
>> not require modification of downstream programs. We could restrict the
>> preloading to programs which requested stdio relaying support from procd
>> and not preload for the rest.
> 
> AFAIK there are 3 solutions to this:
> 1) Modifying every app we want to support with procd + logging
> 2) Using PTY which I tried in https://patchwork.ozlabs.org/patch/486670/
> 3) Using LD_PRELOAD
> 
> The PTY was pointed as not the best choice, so that's why I continued
> with LD_PRELOAD. As Jo-Philipp pointed, it's the same solution
> "stdbuf" uses. I'm afraid there isn't any better alternative :(
> 

oh well, i still dont like it but that is not really relevant i guess ... :)
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