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

[John Crispin]

On 20/06/2015 21:46, Etienne Champetier wrote:
> Hi,
> 
> 2015-06-20 21:35 GMT+02:00 John Crispin <blogic at openwrt.org
> <mailto:blogic at openwrt.org>>:
> 
> 
> 
>     On 20/06/2015 20:53, Rafał Miłecki wrote:
>     > On 20 June 2015 at 13:56, Jo-Philipp Wich <jow at openwrt.org <mailto: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 ... :)
> 
> Aren't you using LD_PRELOAD for procd jailing stuff ?

yes, i do. you simply did not understood what i said. i dont have a
problem with preloading per-se but with the solution for setting the
buffering. however if there really is no saner way then so be it.

> 
> 
> 
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